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Ascension Island, Saint Helena, Ascension and Tristan da Cunhai
Regional Level Types
Ascension IslandIsland
Saint Helena， Ascension and Tristan da CunhaOverseas Territory

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PhotosMapsSearch
03243150014950667959329.jpg
Hematite

Ascension Island, Saint Helena， Ascension and Tristan da Cunha
07197660015148404289766.jpg
Hematite

Ascension Island, Saint Helena， Ascension and Tristan da Cunha
03243150014950667959329.jpg
Hematite

Ascension Island, Saint Helena， Ascension and Tristan da Cunha
09206550015148371289711.jpg
Hematite

Ascension Island, Saint Helena， Ascension and Tristan da Cunha
03243150014950667959329.jpg
Hematite

Ascension Island, Saint Helena， Ascension and Tristan da Cunha
07197660015148404289766.jpg
Hematite

Ascension Island, Saint Helena， Ascension and Tristan da Cunha
Area:
88 km2
Type:
Island
Age:
1.094 to 0.038 Ma
Geologic Time:
Pleistocene
Dating method:
Ar/Ar
Reference for age:
Jicha, B. R., Singer, B. S., & Valentine, M. J. (2013). 40Ar/39Ar geochronology of subaerial Ascension Island and a re-evaluation of the temporal progression of basaltic to rhyolitic volcanism. Journal of Petrology, 54(12), 2581-2596. doi.org/10.1093/petrology/egt058
Largest Settlements:
PlacePopulation
Georgetown538 (2016)
Mindat Locality ID:
57
Long-form identifier:
mindat:1:2:57:7
GUID (UUID V4):
57159c70-917a-4985-a495-b8b80a58eb02
Other Languages:
View 82 more...
French:
île de l'Ascension, Sainte-Hélène
German:
Ascension, St. Helena
Italian:
Isola di Ascensione, Sant'Elena
Russian:
Остров Вознесения, Остров Святой Елены
Simplified Chinese:
阿森松岛, 圣赫勒拿
Spanish:
Isla Ascensión, Isla Santa Elena
Afrikaans:
Ascension, Sint Helena
Alemannic:
Ascension
Arabic:
جزيرة أسينشين, سانت هيلينا
Aragonese:
Isla Ascensión
Armenian:
Համբարձման կղզի, Սուրբ Հեղինեի կղզի
Asturian:
Islla Ascensión, Islla Santa Elena
Azeri:
Askenson adası, Müqəddəs Yelena adası
Bashkir:
Олғашыу Утрауы
Basque:
Ascension, Santa Helena
Belarusian:
Востраў Ушэсця, Востраў Святой Алены
Belarusian (Tarashkevitsa):
Востраў Ушэсьця, Востраў Сьвятая Гэлена
Bengali:
আসেনশন দ্বীপ, সেন্ট হেলেনা
Bosnian:
Ascension, Sveta Helena
Breton:
Ascension, Saint Helena
Bulgarian:
Възнесение, Света Елена
Catalan:
Illa de l'Ascensió, Santa Helena
Cebuano:
Ascension Island
Chechen:
Айъадаларан гӀайре, Езачу Еленин а
Croatian:
Otok Ascension, Sveta Helena
Czech:
Ascension, Svatá Helena
Danish:
Ascension, Sankt Helena
Dutch:
Ascension, Sint-Helena
Egyptian Arabic:
جزيرة اسينشين
Esperanto:
Ascension, Sankta Heleno
Estonian:
Ascension, Saint Helena
Farsi/Persian:
اسنشن, سنت هلن
Finnish:
Ascension, Saint Helena
Gagauz:
Ascension
Galician:
Illa de Ascensión, Santa Helena
Georgian:
ამაღლების კუნძული, წმინდა ელენეს კუნძული
Greek:
Νήσος Αναλήψεως, Νήσος Αγίας Ελένης
Gujarati:
એસેન્શન આઇલેન્ડ, સેન્ટ હેલેના
Hebrew:
אסנשן, סנט הלנה
Hindi:
असेन्शियन द्वीप, सन्त हेलेना
Hungarian:
Ascension-sziget, Szent Ilona
Igbo:
Ascension Island, Saint Helena
Indonesian:
Ascension, Saint Helena
Irish Gaelic:
Oileán na Deascabhála
Japanese:
アセンション島, セントヘレナ
Javanese:
Pulo Ascension
Kannada:
ಅಸೆನ್ಶನ್ ದ್ವೀಪ, ಸೇಂಟ್ ಹೆಲೆನಾ
Kazakh (Cyrillic Script):
Әскенжін Аралы, Сент-Хелена
Korean:
어센션섬, 세인트헬레나
Kurdish (Latin Script):
Girava Asensiyonê
Latin:
Insula Ascensionis, Sancta Helena
Latvian:
Debesbraukšanas sala, Svētās Helēnas Sala
Ligurian:
Isoa de Ascension
Lithuanian:
Dangun Žengimo sala, Šv. Elenos sala
Macedonian:
Успение, Света Елена
Malay:
Pulau Ascension, Saint Helena
Malayalam:
അസെൻഷൻ ദ്വീപ്, സൈന്റ് ഹെലേന
Marathi:
असेन्शन द्वीप, सेंट हेलेना
Norwegian:
Ascension, St. Helena
Norwegian (Nynorsk):
Ascension, St. Helena
Occitan:
Ascension, Santa Elena
Odia:
ଆସେନ୍ସନ ଦ୍ଵୀପ
Ossetian:
Зæрдæвæрæны сакъадах, Сыгъдæг Еленæйы сакъадах
Polish:
Wyspa Wniebowstąpienia, Wyspa Świętej Heleny
Portuguese:
Ilha de Ascensão, Santa Helena
Romanian:
Ascension, Insula Sfânta Elena
Scots:
Ascension Island, Saunt Helena
Scottish Gaelic:
Eilean na Deasgabhalach
Serbian:
Асенсион, Света Јелена
Serbo-Croatian:
Ascension
Sinhalese:
අස්සෙන්ෂන් දුපත, ශාන්ත හෙලේනා
Slovak:
Ascension, Svätá Helena
Slovenian:
Ascension, Sveta Helena
Swedish:
Ascension, Sankta Helena
Tagalog:
Pulo ng Ascension
Tamil:
அசென்சன் தீவு, செயிண்ட் எலனா
Telugu:
అసెన్షన్ దీవులు, సెయింట్ హెలెనా
Thai:
อัสเซนชัน, เซนต์เฮเลนา
Traditional Chinese:
阿森松島, 聖海倫娜
Turkish:
Ascension Adası, Saint Helena
Ukrainian:
Острів Вознесіння, Острів Святої Єлени
Urdu:
جزیرہ اسینشن, سینٹ ہلینا
Uzbek (Latin Script):
Vozneseniye oroli
Vietnamese:
Đảo Ascension, Saint Helena
Waray:
Puro Ascension, Saint Helena
Welsh:
Ynys Ascension, Saint Helena
Wu Chinese:
阿森松島, 圣赫勒拿岛
Yoruba:
Erékùṣù Ascension, Saint Helena


Ascension Island is an isolated volcanic island, 7°56′ south of the Equator in the South Atlantic Ocean. It is about 1,000 miles (1,600 km) from the coast of Africa and 1,400 miles (2,300 km) from the coast of Brazil and has a surface area of 98 square kilometers. It is governed as part of the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha, of which the main island, Saint Helena, is around 800 miles (1,300 km) to the southeast. The territory also includes the sparsely populated Tristan da Cunha archipelago, 2,300 miles (3,700 km) to the south, about halfway to the Antarctic Circle.

Named after the day of its recorded discovery, the Ascension of Jesus, Ascension Island was an important safe haven and coaling station to both mariners and commercial airliners back in the days of international air travel by flying boats.

Ascension is unusual among oceanic islands in having a high proportion of pyroclastic deposits relative to lava flows (approximately 40:60 based on exposure).

The central and eastern parts of the island predominantly comprise pyroclastic deposits (both mafic and silicic) and trachyte lava flows and domes.

The rest of the island predominantly comprises scoria cones and mafic lava flows, some of which have a thin veneer of pyroclastic deposits.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

19 valid minerals. 1 (TL) - type locality of valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Aegirine
Formula: NaFe3+Si2O6
ⓘ Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
References:
Bell, J.D. 1967. The occurrence of obsidian and other natural glasses on Ascension Island. Proceedings of the Geological Society, London, 1641, 179-181.
cogenetic origin. Earth and Planetary Science Letters: 82(3-4): 255-268. doi.org/10.1016/0012-821X(87)90200-7
Daly, R.A. (1925) The geology of Ascension Island. Proceedings of the American Academy of Arts and Sciences: 60: 1-80. doi.org/10.2307/25130043
Van Tassel, R. [with a microchemical analysis by Hey, M.H.] (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine: 29(217): 850-857.
Atkins, F.B., Baker, P.E., Bell, J.D., Smith, D.G.W. (1964) Oxford expedition to Ascension Island, 1964. Nature: 204: 722-724.
Gast, P.W., Tilton, G.R., Hedge, C. (1964) Isotopic composition of lead and strontium from Ascension and Gough islands. Science: 145(3637): 1181-1185.
Roedder, E., Coombs, D.S. (1967) Immiscibility in granitic melts, indicated by fluid inclusions in ejected granitic blocks from Ascension Island. Journal of Petrology: 8(3): 417-451.
Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.
Harris, C., Bell, J.D. (1982) Natural partial melting of syenite blocks from Ascension Island. Contributions to Mineralogy and Petrology: 79(2): 107-113.
Harris, C., Bell, J.D., Atkins, F.B. (1982) Isotopic composition of lead and strontium in lavas and coarse-grained blocks from Ascension Island, South Atlantic. Earth and Planetary Science Letters: 60(1): 79-85.
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
Weis, D. (1983) Pb isotopes in Ascension Island rocks: Oceanic origin for the gabbroic to granitic plutonic inclusions. Earth and Planetary Science Letters: 62(2): 273-282. doi.org/10.1016/0012-821X(83)90090-0
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions
Weaver, B.L., Kar, A., Davidson, J., Colucci, M. (1996) Geochemical characteristics of volcanic rocks from Ascension Island, South Atlantic Ocean. Geothermics: 25(4-5): 449-470.
Kar, A., Weaver, B.L., Davidson, J., Colucci, M. (1998) Origin of differentiated volcanic and plutonic rocks from Ascension Island, South Atlantic Ocean. Journal of Petrology: 39(5): 1009-1024. doi.org/10.1093/petroj/39.5.1009
Jicha, B. R., Singer, B. S., & Valentine, M. J. (2013). 40Ar/39Ar geochronology of subaerial Ascension Island and a re-evaluation of the temporal progression of basaltic to rhyolitic volcanism. Journal of Petrology, 54(12), 2581-2596. doi.org/10.1093/petrology/egt058
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4
ⓘ Aenigmatite
Formula: Na4[Fe2+10Ti2]O4[Si12O36]
ⓘ 'Alkali Feldspar'
ⓘ 'Amphibole Supergroup'
Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
References:
American Mineralogist 28:215-232
Bell, J.D. 1967. The occurrence of obsidian and other natural glasses on Ascension Island. Proceedings of the Geological Society, London, 1641, 179-181.
cogenetic origin. Earth and Planetary Science Letters: 82(3-4): 255-268. doi.org/10.1016/0012-821X(87)90200-7
Daly, R.A. (1925) The geology of Ascension Island. Proceedings of the American Academy of Arts and Sciences: 60: 1-80. doi.org/10.2307/25130043
Van Tassel, R. [with a microchemical analysis by Hey, M.H.] (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine: 29(217): 850-857.
Atkins, F.B., Baker, P.E., Bell, J.D., Smith, D.G.W. (1964) Oxford expedition to Ascension Island, 1964. Nature: 204: 722-724.
Gast, P.W., Tilton, G.R., Hedge, C. (1964) Isotopic composition of lead and strontium from Ascension and Gough islands. Science: 145(3637): 1181-1185.
Roedder, E., Coombs, D.S. (1967) Immiscibility in granitic melts, indicated by fluid inclusions in ejected granitic blocks from Ascension Island. Journal of Petrology: 8(3): 417-451.
Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.
Harris, C., Bell, J.D. (1982) Natural partial melting of syenite blocks from Ascension Island. Contributions to Mineralogy and Petrology: 79(2): 107-113.
Harris, C., Bell, J.D., Atkins, F.B. (1982) Isotopic composition of lead and strontium in lavas and coarse-grained blocks from Ascension Island, South Atlantic. Earth and Planetary Science Letters: 60(1): 79-85.
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
Weis, D. (1983) Pb isotopes in Ascension Island rocks: Oceanic origin for the gabbroic to granitic plutonic inclusions. Earth and Planetary Science Letters: 62(2): 273-282. doi.org/10.1016/0012-821X(83)90090-0
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions
Weaver, B.L., Kar, A., Davidson, J., Colucci, M. (1996) Geochemical characteristics of volcanic rocks from Ascension Island, South Atlantic Ocean. Geothermics: 25(4-5): 449-470.
Kar, A., Weaver, B.L., Davidson, J., Colucci, M. (1998) Origin of differentiated volcanic and plutonic rocks from Ascension Island, South Atlantic Ocean. Journal of Petrology: 39(5): 1009-1024. doi.org/10.1093/petroj/39.5.1009
Jicha, B. R., Singer, B. S., & Valentine, M. J. (2013). 40Ar/39Ar geochronology of subaerial Ascension Island and a re-evaluation of the temporal progression of basaltic to rhyolitic volcanism. Journal of Petrology, 54(12), 2581-2596. doi.org/10.1093/petrology/egt058
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4
ⓘ 'Apatite var. Collophane'
ⓘ Arfvedsonite
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
ⓘ Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
References:
Bell, J.D. 1967. The occurrence of obsidian and other natural glasses on Ascension Island. Proceedings of the Geological Society, London, 1641, 179-181.
cogenetic origin. Earth and Planetary Science Letters: 82(3-4): 255-268. doi.org/10.1016/0012-821X(87)90200-7
Bell, J.D. 1967. The occurrence of obsidian and other natural glasses on Ascension Island. Proceedings of the Geological Society, London, 1641, 179-181.
cogenetic origin. Earth and Planetary Science Letters: 82(3-4): 255-268. doi.org/10.1016/0012-821X(87)90200-7
Daly, R.A. (1925) The geology of Ascension Island. Proceedings of the American Academy of Arts and Sciences: 60: 1-80. doi.org/10.2307/25130043
Van Tassel, R. [with a microchemical analysis by Hey, M.H.] (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine: 29(217): 850-857.
Atkins, F.B., Baker, P.E., Bell, J.D., Smith, D.G.W. (1964) Oxford expedition to Ascension Island, 1964. Nature: 204: 722-724.
Gast, P.W., Tilton, G.R., Hedge, C. (1964) Isotopic composition of lead and strontium from Ascension and Gough islands. Science: 145(3637): 1181-1185.
Atkins, F.B., Baker, P.E., Bell, J.D., Smith, D.G.W. (1964) Oxford expedition to Ascension Island, 1964. Nature: 204: 722-724.
Gast, P.W., Tilton, G.R., Hedge, C. (1964) Isotopic composition of lead and strontium from Ascension and Gough islands. Science: 145(3637): 1181-1185.
Roedder, E., Coombs, D.S. (1967) Immiscibility in granitic melts, indicated by fluid inclusions in ejected granitic blocks from Ascension Island. Journal of Petrology: 8(3): 417-451.
Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.
Harris, C., Bell, J.D. (1982) Natural partial melting of syenite blocks from Ascension Island. Contributions to Mineralogy and Petrology: 79(2): 107-113.
Harris, C., Bell, J.D., Atkins, F.B. (1982) Isotopic composition of lead and strontium in lavas and coarse-grained blocks from Ascension Island, South Atlantic. Earth and Planetary Science Letters: 60(1): 79-85.
Harris, C., Bell, J.D. (1982) Natural partial melting of syenite blocks from Ascension Island. Contributions to Mineralogy and Petrology: 79(2): 107-113.
Harris, C., Bell, J.D., Atkins, F.B. (1982) Isotopic composition of lead and strontium in lavas and coarse-grained blocks from Ascension Island, South Atlantic. Earth and Planetary Science Letters: 60(1): 79-85.
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
Weis, D. (1983) Pb isotopes in Ascension Island rocks: Oceanic origin for the gabbroic to granitic plutonic inclusions. Earth and Planetary Science Letters: 62(2): 273-282. doi.org/10.1016/0012-821X(83)90090-0
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
Weis, D. (1983) Pb isotopes in Ascension Island rocks: Oceanic origin for the gabbroic to granitic plutonic inclusions. Earth and Planetary Science Letters: 62(2): 273-282. doi.org/10.1016/0012-821X(83)90090-0
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions
Weaver, B.L., Kar, A., Davidson, J., Colucci, M. (1996) Geochemical characteristics of volcanic rocks from Ascension Island, South Atlantic Ocean. Geothermics: 25(4-5): 449-470.
Kar, A., Weaver, B.L., Davidson, J., Colucci, M. (1998) Origin of differentiated volcanic and plutonic rocks from Ascension Island, South Atlantic Ocean. Journal of Petrology: 39(5): 1009-1024. doi.org/10.1093/petroj/39.5.1009
Jicha, B. R., Singer, B. S., & Valentine, M. J. (2013). 40Ar/39Ar geochronology of subaerial Ascension Island and a re-evaluation of the temporal progression of basaltic to rhyolitic volcanism. Journal of Petrology, 54(12), 2581-2596. doi.org/10.1093/petrology/egt058
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
References:
Bell, J.D. 1967. The occurrence of obsidian and other natural glasses on Ascension Island. Proceedings of the Geological Society, London, 1641, 179-181.
cogenetic origin. Earth and Planetary Science Letters: 82(3-4): 255-268. doi.org/10.1016/0012-821X(87)90200-7
Daly, R.A. (1925) The geology of Ascension Island. Proceedings of the American Academy of Arts and Sciences: 60: 1-80. doi.org/10.2307/25130043
Van Tassel, R. [with a microchemical analysis by Hey, M.H.] (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine: 29(217): 850-857.
Atkins, F.B., Baker, P.E., Bell, J.D., Smith, D.G.W. (1964) Oxford expedition to Ascension Island, 1964. Nature: 204: 722-724.
Gast, P.W., Tilton, G.R., Hedge, C. (1964) Isotopic composition of lead and strontium from Ascension and Gough islands. Science: 145(3637): 1181-1185.
Roedder, E., Coombs, D.S. (1967) Immiscibility in granitic melts, indicated by fluid inclusions in ejected granitic blocks from Ascension Island. Journal of Petrology: 8(3): 417-451.
Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.
Harris, C., Bell, J.D. (1982) Natural partial melting of syenite blocks from Ascension Island. Contributions to Mineralogy and Petrology: 79(2): 107-113.
Harris, C., Bell, J.D., Atkins, F.B. (1982) Isotopic composition of lead and strontium in lavas and coarse-grained blocks from Ascension Island, South Atlantic. Earth and Planetary Science Letters: 60(1): 79-85.
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
Weis, D. (1983) Pb isotopes in Ascension Island rocks: Oceanic origin for the gabbroic to granitic plutonic inclusions. Earth and Planetary Science Letters: 62(2): 273-282. doi.org/10.1016/0012-821X(83)90090-0
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions
Weaver, B.L., Kar, A., Davidson, J., Colucci, M. (1996) Geochemical characteristics of volcanic rocks from Ascension Island, South Atlantic Ocean. Geothermics: 25(4-5): 449-470.
Kar, A., Weaver, B.L., Davidson, J., Colucci, M. (1998) Origin of differentiated volcanic and plutonic rocks from Ascension Island, South Atlantic Ocean. Journal of Petrology: 39(5): 1009-1024. doi.org/10.1093/petroj/39.5.1009
Jicha, B. R., Singer, B. S., & Valentine, M. J. (2013). 40Ar/39Ar geochronology of subaerial Ascension Island and a re-evaluation of the temporal progression of basaltic to rhyolitic volcanism. Journal of Petrology, 54(12), 2581-2596. doi.org/10.1093/petrology/egt058
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4
ⓘ Dalyite (TL)
Formula: K2ZrSi6O15
Description: Accessory in ejected blocks of alkalic granite in trachytic and basaltic tuffs.
ⓘ Edenite
Formula: NaCa2Mg5(Si7Al)O22(OH)2
References:
Bell, J.D. 1967. The occurrence of obsidian and other natural glasses on Ascension Island. Proceedings of the Geological Society, London, 1641, 179-181.
cogenetic origin. Earth and Planetary Science Letters: 82(3-4): 255-268. doi.org/10.1016/0012-821X(87)90200-7
Daly, R.A. (1925) The geology of Ascension Island. Proceedings of the American Academy of Arts and Sciences: 60: 1-80. doi.org/10.2307/25130043
Van Tassel, R. [with a microchemical analysis by Hey, M.H.] (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine: 29(217): 850-857.
Atkins, F.B., Baker, P.E., Bell, J.D., Smith, D.G.W. (1964) Oxford expedition to Ascension Island, 1964. Nature: 204: 722-724.
Gast, P.W., Tilton, G.R., Hedge, C. (1964) Isotopic composition of lead and strontium from Ascension and Gough islands. Science: 145(3637): 1181-1185.
Roedder, E., Coombs, D.S. (1967) Immiscibility in granitic melts, indicated by fluid inclusions in ejected granitic blocks from Ascension Island. Journal of Petrology: 8(3): 417-451.
Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.
Harris, C., Bell, J.D. (1982) Natural partial melting of syenite blocks from Ascension Island. Contributions to Mineralogy and Petrology: 79(2): 107-113.
Harris, C., Bell, J.D., Atkins, F.B. (1982) Isotopic composition of lead and strontium in lavas and coarse-grained blocks from Ascension Island, South Atlantic. Earth and Planetary Science Letters: 60(1): 79-85.
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
Weis, D. (1983) Pb isotopes in Ascension Island rocks: Oceanic origin for the gabbroic to granitic plutonic inclusions. Earth and Planetary Science Letters: 62(2): 273-282. doi.org/10.1016/0012-821X(83)90090-0
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions
Weaver, B.L., Kar, A., Davidson, J., Colucci, M. (1996) Geochemical characteristics of volcanic rocks from Ascension Island, South Atlantic Ocean. Geothermics: 25(4-5): 449-470.
Kar, A., Weaver, B.L., Davidson, J., Colucci, M. (1998) Origin of differentiated volcanic and plutonic rocks from Ascension Island, South Atlantic Ocean. Journal of Petrology: 39(5): 1009-1024. doi.org/10.1093/petroj/39.5.1009
Jicha, B. R., Singer, B. S., & Valentine, M. J. (2013). 40Ar/39Ar geochronology of subaerial Ascension Island and a re-evaluation of the temporal progression of basaltic to rhyolitic volcanism. Journal of Petrology, 54(12), 2581-2596. doi.org/10.1093/petrology/egt058
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4
ⓘ Eudialyte
Formula: Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
ⓘ Fayalite
Formula: Fe2+2SiO4
ⓘ 'Fayalite-Forsterite Series'
References:
Bell, J.D. 1967. The occurrence of obsidian and other natural glasses on Ascension Island. Proceedings of the Geological Society, London, 1641, 179-181.
cogenetic origin. Earth and Planetary Science Letters: 82(3-4): 255-268. doi.org/10.1016/0012-821X(87)90200-7
Daly, R.A. (1925) The geology of Ascension Island. Proceedings of the American Academy of Arts and Sciences: 60: 1-80. doi.org/10.2307/25130043
Van Tassel, R. [with a microchemical analysis by Hey, M.H.] (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine: 29(217): 850-857.
Atkins, F.B., Baker, P.E., Bell, J.D., Smith, D.G.W. (1964) Oxford expedition to Ascension Island, 1964. Nature: 204: 722-724.
Gast, P.W., Tilton, G.R., Hedge, C. (1964) Isotopic composition of lead and strontium from Ascension and Gough islands. Science: 145(3637): 1181-1185.
Roedder, E., Coombs, D.S. (1967) Immiscibility in granitic melts, indicated by fluid inclusions in ejected granitic blocks from Ascension Island. Journal of Petrology: 8(3): 417-451.
Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.
Harris, C., Bell, J.D. (1982) Natural partial melting of syenite blocks from Ascension Island. Contributions to Mineralogy and Petrology: 79(2): 107-113.
Harris, C., Bell, J.D., Atkins, F.B. (1982) Isotopic composition of lead and strontium in lavas and coarse-grained blocks from Ascension Island, South Atlantic. Earth and Planetary Science Letters: 60(1): 79-85.
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
Weis, D. (1983) Pb isotopes in Ascension Island rocks: Oceanic origin for the gabbroic to granitic plutonic inclusions. Earth and Planetary Science Letters: 62(2): 273-282. doi.org/10.1016/0012-821X(83)90090-0
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions
Weaver, B.L., Kar, A., Davidson, J., Colucci, M. (1996) Geochemical characteristics of volcanic rocks from Ascension Island, South Atlantic Ocean. Geothermics: 25(4-5): 449-470.
Kar, A., Weaver, B.L., Davidson, J., Colucci, M. (1998) Origin of differentiated volcanic and plutonic rocks from Ascension Island, South Atlantic Ocean. Journal of Petrology: 39(5): 1009-1024. doi.org/10.1093/petroj/39.5.1009
Jicha, B. R., Singer, B. S., & Valentine, M. J. (2013). 40Ar/39Ar geochronology of subaerial Ascension Island and a re-evaluation of the temporal progression of basaltic to rhyolitic volcanism. Journal of Petrology, 54(12), 2581-2596. doi.org/10.1093/petrology/egt058
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4
ⓘ 'Feldspar Group'
ⓘ 'Feldspar Group var. Perthite'
ⓘ Hedenbergite
Formula: CaFe2+Si2O6
References:
Bell, J.D. 1967. The occurrence of obsidian and other natural glasses on Ascension Island. Proceedings of the Geological Society, London, 1641, 179-181.
cogenetic origin. Earth and Planetary Science Letters: 82(3-4): 255-268. doi.org/10.1016/0012-821X(87)90200-7
Daly, R.A. (1925) The geology of Ascension Island. Proceedings of the American Academy of Arts and Sciences: 60: 1-80. doi.org/10.2307/25130043
Van Tassel, R. [with a microchemical analysis by Hey, M.H.] (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine: 29(217): 850-857.
Atkins, F.B., Baker, P.E., Bell, J.D., Smith, D.G.W. (1964) Oxford expedition to Ascension Island, 1964. Nature: 204: 722-724.
Gast, P.W., Tilton, G.R., Hedge, C. (1964) Isotopic composition of lead and strontium from Ascension and Gough islands. Science: 145(3637): 1181-1185.
Roedder, E., Coombs, D.S. (1967) Immiscibility in granitic melts, indicated by fluid inclusions in ejected granitic blocks from Ascension Island. Journal of Petrology: 8(3): 417-451.
Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.
Harris, C., Bell, J.D. (1982) Natural partial melting of syenite blocks from Ascension Island. Contributions to Mineralogy and Petrology: 79(2): 107-113.
Harris, C., Bell, J.D., Atkins, F.B. (1982) Isotopic composition of lead and strontium in lavas and coarse-grained blocks from Ascension Island, South Atlantic. Earth and Planetary Science Letters: 60(1): 79-85.
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
Weis, D. (1983) Pb isotopes in Ascension Island rocks: Oceanic origin for the gabbroic to granitic plutonic inclusions. Earth and Planetary Science Letters: 62(2): 273-282. doi.org/10.1016/0012-821X(83)90090-0
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions
Weaver, B.L., Kar, A., Davidson, J., Colucci, M. (1996) Geochemical characteristics of volcanic rocks from Ascension Island, South Atlantic Ocean. Geothermics: 25(4-5): 449-470.
Kar, A., Weaver, B.L., Davidson, J., Colucci, M. (1998) Origin of differentiated volcanic and plutonic rocks from Ascension Island, South Atlantic Ocean. Journal of Petrology: 39(5): 1009-1024. doi.org/10.1093/petroj/39.5.1009
Jicha, B. R., Singer, B. S., & Valentine, M. J. (2013). 40Ar/39Ar geochronology of subaerial Ascension Island and a re-evaluation of the temporal progression of basaltic to rhyolitic volcanism. Journal of Petrology, 54(12), 2581-2596. doi.org/10.1093/petrology/egt058
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4
ⓘ Hematite
Formula: Fe2O3
ⓘ Katophorite
Formula: {Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
References:
Bell, J.D. 1967. The occurrence of obsidian and other natural glasses on Ascension Island. Proceedings of the Geological Society, London, 1641, 179-181.
cogenetic origin. Earth and Planetary Science Letters: 82(3-4): 255-268. doi.org/10.1016/0012-821X(87)90200-7
Daly, R.A. (1925) The geology of Ascension Island. Proceedings of the American Academy of Arts and Sciences: 60: 1-80. doi.org/10.2307/25130043
Van Tassel, R. [with a microchemical analysis by Hey, M.H.] (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine: 29(217): 850-857.
Atkins, F.B., Baker, P.E., Bell, J.D., Smith, D.G.W. (1964) Oxford expedition to Ascension Island, 1964. Nature: 204: 722-724.
Gast, P.W., Tilton, G.R., Hedge, C. (1964) Isotopic composition of lead and strontium from Ascension and Gough islands. Science: 145(3637): 1181-1185.
Roedder, E., Coombs, D.S. (1967) Immiscibility in granitic melts, indicated by fluid inclusions in ejected granitic blocks from Ascension Island. Journal of Petrology: 8(3): 417-451.
Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.
Harris, C., Bell, J.D. (1982) Natural partial melting of syenite blocks from Ascension Island. Contributions to Mineralogy and Petrology: 79(2): 107-113.
Harris, C., Bell, J.D., Atkins, F.B. (1982) Isotopic composition of lead and strontium in lavas and coarse-grained blocks from Ascension Island, South Atlantic. Earth and Planetary Science Letters: 60(1): 79-85.
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
Weis, D. (1983) Pb isotopes in Ascension Island rocks: Oceanic origin for the gabbroic to granitic plutonic inclusions. Earth and Planetary Science Letters: 62(2): 273-282. doi.org/10.1016/0012-821X(83)90090-0
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions
Weaver, B.L., Kar, A., Davidson, J., Colucci, M. (1996) Geochemical characteristics of volcanic rocks from Ascension Island, South Atlantic Ocean. Geothermics: 25(4-5): 449-470.
Kar, A., Weaver, B.L., Davidson, J., Colucci, M. (1998) Origin of differentiated volcanic and plutonic rocks from Ascension Island, South Atlantic Ocean. Journal of Petrology: 39(5): 1009-1024. doi.org/10.1093/petroj/39.5.1009
Jicha, B. R., Singer, B. S., & Valentine, M. J. (2013). 40Ar/39Ar geochronology of subaerial Ascension Island and a re-evaluation of the temporal progression of basaltic to rhyolitic volcanism. Journal of Petrology, 54(12), 2581-2596. doi.org/10.1093/petrology/egt058
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4
ⓘ Monetite
Formula: Ca(PO3OH)
ⓘ Newberyite
Formula: Mg(PO3OH) · 3H2O
ⓘ 'Orthopyroxene Subgroup'
References:
Bell, J.D. 1967. The occurrence of obsidian and other natural glasses on Ascension Island. Proceedings of the Geological Society, London, 1641, 179-181.
cogenetic origin. Earth and Planetary Science Letters: 82(3-4): 255-268. doi.org/10.1016/0012-821X(87)90200-7
Daly, R.A. (1925) The geology of Ascension Island. Proceedings of the American Academy of Arts and Sciences: 60: 1-80. doi.org/10.2307/25130043
Van Tassel, R. [with a microchemical analysis by Hey, M.H.] (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine: 29(217): 850-857.
Atkins, F.B., Baker, P.E., Bell, J.D., Smith, D.G.W. (1964) Oxford expedition to Ascension Island, 1964. Nature: 204: 722-724.
Gast, P.W., Tilton, G.R., Hedge, C. (1964) Isotopic composition of lead and strontium from Ascension and Gough islands. Science: 145(3637): 1181-1185.
Roedder, E., Coombs, D.S. (1967) Immiscibility in granitic melts, indicated by fluid inclusions in ejected granitic blocks from Ascension Island. Journal of Petrology: 8(3): 417-451.
Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.
Harris, C., Bell, J.D. (1982) Natural partial melting of syenite blocks from Ascension Island. Contributions to Mineralogy and Petrology: 79(2): 107-113.
Harris, C., Bell, J.D., Atkins, F.B. (1982) Isotopic composition of lead and strontium in lavas and coarse-grained blocks from Ascension Island, South Atlantic. Earth and Planetary Science Letters: 60(1): 79-85.
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
Weis, D. (1983) Pb isotopes in Ascension Island rocks: Oceanic origin for the gabbroic to granitic plutonic inclusions. Earth and Planetary Science Letters: 62(2): 273-282. doi.org/10.1016/0012-821X(83)90090-0
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions
Weaver, B.L., Kar, A., Davidson, J., Colucci, M. (1996) Geochemical characteristics of volcanic rocks from Ascension Island, South Atlantic Ocean. Geothermics: 25(4-5): 449-470.
Kar, A., Weaver, B.L., Davidson, J., Colucci, M. (1998) Origin of differentiated volcanic and plutonic rocks from Ascension Island, South Atlantic Ocean. Journal of Petrology: 39(5): 1009-1024. doi.org/10.1093/petroj/39.5.1009
Jicha, B. R., Singer, B. S., & Valentine, M. J. (2013). 40Ar/39Ar geochronology of subaerial Ascension Island and a re-evaluation of the temporal progression of basaltic to rhyolitic volcanism. Journal of Petrology, 54(12), 2581-2596. doi.org/10.1093/petrology/egt058
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
References:
Bell, J.D. 1967. The occurrence of obsidian and other natural glasses on Ascension Island. Proceedings of the Geological Society, London, 1641, 179-181.
cogenetic origin. Earth and Planetary Science Letters: 82(3-4): 255-268. doi.org/10.1016/0012-821X(87)90200-7
Bell, J.D. 1967. The occurrence of obsidian and other natural glasses on Ascension Island. Proceedings of the Geological Society, London, 1641, 179-181.
cogenetic origin. Earth and Planetary Science Letters: 82(3-4): 255-268. doi.org/10.1016/0012-821X(87)90200-7
Daly, R.A. (1925) The geology of Ascension Island. Proceedings of the American Academy of Arts and Sciences: 60: 1-80. doi.org/10.2307/25130043
Van Tassel, R. [with a microchemical analysis by Hey, M.H.] (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine: 29(217): 850-857.
Atkins, F.B., Baker, P.E., Bell, J.D., Smith, D.G.W. (1964) Oxford expedition to Ascension Island, 1964. Nature: 204: 722-724.
Gast, P.W., Tilton, G.R., Hedge, C. (1964) Isotopic composition of lead and strontium from Ascension and Gough islands. Science: 145(3637): 1181-1185.
Atkins, F.B., Baker, P.E., Bell, J.D., Smith, D.G.W. (1964) Oxford expedition to Ascension Island, 1964. Nature: 204: 722-724.
Gast, P.W., Tilton, G.R., Hedge, C. (1964) Isotopic composition of lead and strontium from Ascension and Gough islands. Science: 145(3637): 1181-1185.
Roedder, E., Coombs, D.S. (1967) Immiscibility in granitic melts, indicated by fluid inclusions in ejected granitic blocks from Ascension Island. Journal of Petrology: 8(3): 417-451.
Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.
Harris, C., Bell, J.D. (1982) Natural partial melting of syenite blocks from Ascension Island. Contributions to Mineralogy and Petrology: 79(2): 107-113.
Harris, C., Bell, J.D., Atkins, F.B. (1982) Isotopic composition of lead and strontium in lavas and coarse-grained blocks from Ascension Island, South Atlantic. Earth and Planetary Science Letters: 60(1): 79-85.
Harris, C., Bell, J.D. (1982) Natural partial melting of syenite blocks from Ascension Island. Contributions to Mineralogy and Petrology: 79(2): 107-113.
Harris, C., Bell, J.D., Atkins, F.B. (1982) Isotopic composition of lead and strontium in lavas and coarse-grained blocks from Ascension Island, South Atlantic. Earth and Planetary Science Letters: 60(1): 79-85.
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
Weis, D. (1983) Pb isotopes in Ascension Island rocks: Oceanic origin for the gabbroic to granitic plutonic inclusions. Earth and Planetary Science Letters: 62(2): 273-282. doi.org/10.1016/0012-821X(83)90090-0
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
Weis, D. (1983) Pb isotopes in Ascension Island rocks: Oceanic origin for the gabbroic to granitic plutonic inclusions. Earth and Planetary Science Letters: 62(2): 273-282. doi.org/10.1016/0012-821X(83)90090-0
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions
Weaver, B.L., Kar, A., Davidson, J., Colucci, M. (1996) Geochemical characteristics of volcanic rocks from Ascension Island, South Atlantic Ocean. Geothermics: 25(4-5): 449-470.
Kar, A., Weaver, B.L., Davidson, J., Colucci, M. (1998) Origin of differentiated volcanic and plutonic rocks from Ascension Island, South Atlantic Ocean. Journal of Petrology: 39(5): 1009-1024. doi.org/10.1093/petroj/39.5.1009
Jicha, B. R., Singer, B. S., & Valentine, M. J. (2013). 40Ar/39Ar geochronology of subaerial Ascension Island and a re-evaluation of the temporal progression of basaltic to rhyolitic volcanism. Journal of Petrology, 54(12), 2581-2596. doi.org/10.1093/petrology/egt058
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4
ⓘ Quartz
Formula: SiO2
ⓘ Riebeckite
Formula: ◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
References:
Bell, J.D. 1967. The occurrence of obsidian and other natural glasses on Ascension Island. Proceedings of the Geological Society, London, 1641, 179-181.
cogenetic origin. Earth and Planetary Science Letters: 82(3-4): 255-268. doi.org/10.1016/0012-821X(87)90200-7
Daly, R.A. (1925) The geology of Ascension Island. Proceedings of the American Academy of Arts and Sciences: 60: 1-80. doi.org/10.2307/25130043
Van Tassel, R. [with a microchemical analysis by Hey, M.H.] (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine: 29(217): 850-857.
Atkins, F.B., Baker, P.E., Bell, J.D., Smith, D.G.W. (1964) Oxford expedition to Ascension Island, 1964. Nature: 204: 722-724.
Gast, P.W., Tilton, G.R., Hedge, C. (1964) Isotopic composition of lead and strontium from Ascension and Gough islands. Science: 145(3637): 1181-1185.
Roedder, E., Coombs, D.S. (1967) Immiscibility in granitic melts, indicated by fluid inclusions in ejected granitic blocks from Ascension Island. Journal of Petrology: 8(3): 417-451.
Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.
Harris, C., Bell, J.D. (1982) Natural partial melting of syenite blocks from Ascension Island. Contributions to Mineralogy and Petrology: 79(2): 107-113.
Harris, C., Bell, J.D., Atkins, F.B. (1982) Isotopic composition of lead and strontium in lavas and coarse-grained blocks from Ascension Island, South Atlantic. Earth and Planetary Science Letters: 60(1): 79-85.
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
Weis, D. (1983) Pb isotopes in Ascension Island rocks: Oceanic origin for the gabbroic to granitic plutonic inclusions. Earth and Planetary Science Letters: 62(2): 273-282. doi.org/10.1016/0012-821X(83)90090-0
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions
Weaver, B.L., Kar, A., Davidson, J., Colucci, M. (1996) Geochemical characteristics of volcanic rocks from Ascension Island, South Atlantic Ocean. Geothermics: 25(4-5): 449-470.
Kar, A., Weaver, B.L., Davidson, J., Colucci, M. (1998) Origin of differentiated volcanic and plutonic rocks from Ascension Island, South Atlantic Ocean. Journal of Petrology: 39(5): 1009-1024. doi.org/10.1093/petroj/39.5.1009
Jicha, B. R., Singer, B. S., & Valentine, M. J. (2013). 40Ar/39Ar geochronology of subaerial Ascension Island and a re-evaluation of the temporal progression of basaltic to rhyolitic volcanism. Journal of Petrology, 54(12), 2581-2596. doi.org/10.1093/petrology/egt058
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4
ⓘ Vlasovite
Formula: Na2ZrSi4O11
ⓘ Whitlockite
Formula: Ca9Mg(PO4)6(PO3OH)
ⓘ Whitlockite var. Martinite (of Kloos)
ⓘ Zircon
Formula: Zr(SiO4)

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘHematite4.CB.05Fe2O3
ⓘQuartz4.DA.05SiO2
Group 8 - Phosphates, Arsenates and Vanadates
ⓘWhitlockite
var. Martinite (of Kloos)		8.AC.45Ca9Mg(PO4)6(PO3OH)
ⓘ8.AC.45Ca9Mg(PO4)6(PO3OH)
ⓘMonetite8.AD.10Ca(PO3OH)
ⓘNewberyite8.CE.10Mg(PO3OH) · 3H2O
Group 9 - Silicates
ⓘFayalite9.AC.05Fe2+2SiO4
ⓘZircon9.AD.30Zr(SiO4)
ⓘEudialyte9.CO.10Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
ⓘHedenbergite9.DA.15CaFe2+Si2O6
ⓘAugite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘAegirine-augite9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
ⓘAegirine9.DA.25NaFe3+Si2O6
ⓘEdenite9.DE.15NaCa2Mg5(Si7Al)O22(OH)2
ⓘKatophorite9.DE.20{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
ⓘArfvedsonite9.DE.25[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
ⓘRiebeckite9.DE.25◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
ⓘAenigmatite9.DH.40Na4[Fe2+10Ti2]O4[Si12O36]
ⓘVlasovite9.DM.25Na2ZrSi4O11
ⓘDalyite (TL)9.EA.25K2ZrSi6O15
Unclassified
ⓘ'Feldspar Group'-
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'Orthopyroxene Subgroup'-
ⓘ'Apatite
var. Collophane'		-Ca5(PO4)3(Cl/F/OH)
ⓘ'Alkali Feldspar'-
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Feldspar Group
var. Perthite'		-
ⓘ'Amphibole Supergroup'-AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Hⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Hⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Hⓘ MonetiteCa(PO3OH)
Hⓘ NewberyiteMg(PO3OH) · 3H2O
Hⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Hⓘ WhitlockiteCa9Mg(PO4)6(PO3OH)
Hⓘ Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
OOxygen
Oⓘ AegirineNaFe3+Si2O6
Oⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Oⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Oⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Oⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Oⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ DalyiteK2ZrSi6O15
Oⓘ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Oⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Oⓘ FayaliteFe22+SiO4
Oⓘ HedenbergiteCaFe2+Si2O6
Oⓘ HematiteFe2O3
Oⓘ MonetiteCa(PO3OH)
Oⓘ NewberyiteMg(PO3OH) · 3H2O
Oⓘ QuartzSiO2
Oⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Oⓘ VlasoviteNa2ZrSi4O11
Oⓘ WhitlockiteCa9Mg(PO4)6(PO3OH)
Oⓘ ZirconZr(SiO4)
Oⓘ Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
Fⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naⓘ AegirineNaFe3+Si2O6
Naⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Naⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Naⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Naⓘ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Naⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Naⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Naⓘ VlasoviteNa2ZrSi4O11
Naⓘ Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Mgⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Mgⓘ NewberyiteMg(PO3OH) · 3H2O
Mgⓘ WhitlockiteCa9Mg(PO4)6(PO3OH)
Mgⓘ Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
AlAluminium
Alⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Alⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Alⓘ Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ AegirineNaFe3+Si2O6
Siⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Siⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Siⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Siⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Siⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ DalyiteK2ZrSi6O15
Siⓘ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Siⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Siⓘ FayaliteFe22+SiO4
Siⓘ HedenbergiteCaFe2+Si2O6
Siⓘ QuartzSiO2
Siⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Siⓘ VlasoviteNa2ZrSi4O11
Siⓘ ZirconZr(SiO4)
Siⓘ Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
PPhosphorus
Pⓘ MonetiteCa(PO3OH)
Pⓘ NewberyiteMg(PO3OH) · 3H2O
Pⓘ WhitlockiteCa9Mg(PO4)6(PO3OH)
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
ClChlorine
Clⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Clⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ DalyiteK2ZrSi6O15
CaCalcium
Caⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Caⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Caⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Caⓘ HedenbergiteCaFe2+Si2O6
Caⓘ MonetiteCa(PO3OH)
Caⓘ WhitlockiteCa9Mg(PO4)6(PO3OH)
Caⓘ Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Tiⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Tiⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feⓘ AegirineNaFe3+Si2O6
Feⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Feⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Feⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Feⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Feⓘ FayaliteFe22+SiO4
Feⓘ HedenbergiteCaFe2+Si2O6
Feⓘ HematiteFe2O3
Feⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
ZrZirconium
Zrⓘ DalyiteK2ZrSi6O15
Zrⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Zrⓘ VlasoviteNa2ZrSi4O11
Zrⓘ ZirconZr(SiO4)

Fossils

There are 8 fossil localities from the PaleoBioDB database within this region.

BETA TEST - These data are provided on an experimental basis and are taken from external databases. Mindat.org has no control currently over the accuracy of these data.

Occurrences31
Youngest Fossil Listed
Oldest Fossil Listed0.01 Ma (Pleistocene)
Fossils from RegionClick here to show the list.
Accepted NameHierarchy Age
Sula
genus		Animalia : Chordata : Aves : Suliformes : Sulidae : Sula0.0117 - 0 Ma
Quaternary
Rattus
genus		Animalia : Chordata : Mammalia : Rodentia : Muridae : Rattus0.0117 - 0 Ma
Quaternary
Puffinus lherminieri
species		Animalia : Chordata : Aves : Procellariiformes : Procellariidae : Puffinus : Puffinus lherminieri0.0117 - 0 Ma
Quaternary
Oceanodroma castro
species		Animalia : Chordata : Aves : Procellariiformes : Hydrobatidae : Oceanodroma : Oceanodroma castro0.0117 - 0 Ma
Quaternary
Sula dactylatra
species		Animalia : Chordata : Aves : Suliformes : Sulidae : Sula : Sula dactylatra0.0117 - 0 Ma
Quaternary
Phaethon aethereus
species		Animalia : Chordata : Aves : Phaethontiformes : Phaethontidae : Phaethon : Phaethon aethereus0.0117 - 0 Ma
Quaternary
Sula sula
species		Animalia : Chordata : Aves : Suliformes : Sulidae : Sula : Sula sula0.0117 - 0 Ma
Quaternary
Sula leucogaster
species		Animalia : Chordata : Aves : Suliformes : Sulidae : Sula : Sula leucogaster0.0117 - 0 Ma
Quaternary
Gygis alba
species		Animalia : Chordata : Aves : Charadriiformes : Laridae : Gygis : Gygis alba0.0117 - 0 Ma
Quaternary
Onychoprion fuscatus
species		Animalia : Chordata : Aves : Charadriiformes : Laridae : Onychoprion : Onychoprion fuscatus0.0117 - 0 Ma
Quaternary
Fregata aquila
species		Animalia : Chordata : Aves : Suliformes : Fregatidae : Fregata : Fregata aquila0.0117 - 0 Ma
Quaternary
Mundia elpenor
species		Animalia : Chordata : Aves : Gruiformes : Rallidae : Mundia : Mundia elpenor0.0117 - 0 Ma
Quaternary
Nycticorax olsoni
species		Animalia : Chordata : Aves : Pelecaniformes : Ardeidae : Nycticorax : Nycticorax olsoni0.0117 - 0 Ma
Quaternary
Porphyrio alleni
species		Animalia : Chordata : Aves : Gruiformes : Rallidae : Porphyrio : Porphyrio alleni0.0117 - 0 Ma
Quaternary
Fossil LocalitiesClick to show 5 fossil localities

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Ascension_Island
Wikidata ID:Q46197
GeoNames ID:2411429

Localities in this Region

Saint Helena, Ascension and Tristan da Cunha

Other Regions, Features and Areas that Intersect

Atlantic Ocean
South America PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Bell, J.D. 1967. The occurrence of obsidian and other natural glasses on Ascension Island. Proceedings of the Geological Society, London, 1641, 179-181.
(n.d.)
Darwin, C. (1876) Geological observations on the volcanic islands. 2nd Edition. Smith, Elder and Co., London, 674 pages.
Daly, R.A. (1925) The geology of Ascension Island. Proceedings of the American Academy of Arts and Sciences: 60: 1-80. doi.org/10.2307/25130043
Van Tassel, R. [with a microchemical analysis by Hey, M.H.] (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine: 29(217): 850-857.
Atkins, F.B., Baker, P.E., Bell, J.D., Smith, D.G.W. (1964) Oxford expedition to Ascension Island, 1964. Nature: 204: 722-724.
Gast, P.W., Tilton, G.R., Hedge, C. (1964) Isotopic composition of lead and strontium from Ascension and Gough islands. Science: 145(3637): 1181-1185.
Roedder, E., Coombs, D.S. (1967) Immiscibility in granitic melts, indicated by fluid inclusions in ejected granitic blocks from Ascension Island. Journal of Petrology: 8(3): 417-451.
Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.
Harris, C., Bell, J.D. (1982) Natural partial melting of syenite blocks from Ascension Island. Contributions to Mineralogy and Petrology: 79(2): 107-113.
Harris, C., Bell, J.D., Atkins, F.B. (1982) Isotopic composition of lead and strontium in lavas and coarse-grained blocks from Ascension Island, South Atlantic. Earth and Planetary Science Letters: 60(1): 79-85.
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
Weis, D. (1983) Pb isotopes in Ascension Island rocks: Oceanic origin for the gabbroic to granitic plutonic inclusions. Earth and Planetary Science Letters: 62(2): 273-282. doi.org/10.1016/0012-821X(83)90090-0
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions; cogenetic origin. Earth and Planetary Science Letters: 82(3-4): 255-268. doi.org/10.1016/0012-821X(87)90200-7
Weaver, B.L., Kar, A., Davidson, J., Colucci, M. (1996) Geochemical characteristics of volcanic rocks from Ascension Island, South Atlantic Ocean. Geothermics: 25(4-5): 449-470.
Kar, A., Weaver, B.L., Davidson, J., Colucci, M. (1998) Origin of differentiated volcanic and plutonic rocks from Ascension Island, South Atlantic Ocean. Journal of Petrology: 39(5): 1009-1024. doi.org/10.1093/petroj/39.5.1009
Jicha, B. R., Singer, B. S., & Valentine, M. J. (2013). 40Ar/39Ar geochronology of subaerial Ascension Island and a re-evaluation of the temporal progression of basaltic to rhyolitic volcanism. Journal of Petrology, 54(12), 2581-2596. doi.org/10.1093/petrology/egt058
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4
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