Somanya, Kpong and Pore Areas, Asuogyaman District, Eastern Region, Ghanai
Regional Level Types | |
---|---|
SomanyaοΌKpong and Pore Areas | Occurrence |
Asuogyaman District | District |
Eastern Region | Region |
Ghana | Country |
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Latitude & Longitude (WGS84):
6° 9' 32'' North , 0° 3' 27'' East
Latitude & Longitude (decimal):
Locality type:
KΓΆppen climate type:
Peralkaline and feldspathoidal gneisses form a layer (7-20 m thick) within the Precambrian Dahomeyan basement gneisses. It can be traced almost continuously for 76 km (Kesse 1985) in the vicinity of the towns of Somanya, Kpong and Pore (Holm 1974).
Approx coords range: 6ΒΊ00' - 6ΒΊ18'N; 0ΒΊ02'W - 0ΒΊ15'E.
The nepheline gneisses have been investigated as a feedstock for glass and ceramics (Allen & Charsley 1968).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
19 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
β Aegirine-augite Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston.
Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Albite Formula: Na(AlSi3O8) Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston.
Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β 'Allanite Group' Formula: {A12+REE3+}{M13+M23+M32+}(Si2O7)(SiO4)O(OH) Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β 'Amphibole Supergroup' Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 Description: Amphiboles range up to 10 modal percent with biotite and aegirine-rich pyroxene in the leucocratic nepheline gneisses, and may be as much as 55 percent in the mafic and feldspar-poor nepheline gneisses
where they occur with grandite and aegirine-augites closer to soda augite. The amphiboles are black in hand specimens and may form a lineation.
Hastingsite (as defined by Leake, 1968) and iron-rich alkaline amphibole are the only types present. The leucocratic nepheline gneisses contain amphiboles richest in Na and Fe3+. (Holm, 1971) Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Andradite Formula: Ca3Fe3+2(SiO4)3 Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β 'Apatite' Formula: Ca5(PO4)3(Cl/F/OH) Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Augite Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6 Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β 'Biotite' Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston.
Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Calcite Formula: CaCO3 Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston.
Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Cancrinite Formula: (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Epidote Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH) Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β 'Ferro-ferri-sadanagaite' ? Formula: {Na}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)(OH)2 Description: Holm (1974) provide a wet-chemical analysis corresponding to ferro-ferri-sadanagaite:
SiO2, 37.02%
TiO2, 1.64%
Al2O3, 17.29%
Fe2O3, 7.79%
FeO, 14.94%
MnO, 0.53%
MgO, 5.19%
CaO, 9.46%
Na2O, 3.38%
K2O, 2.4%
When this is normalized (using Locock 2014), the empirical formula becomes (Na0.592K0.469)Ξ£1.061 (Ca1.552Na0.411Mn0.038)Ξ£2.001 (Feii1.913Mg1.184FeIII0.897Al0.786Ti0.189Mnii0.031)Ξ£5 (Si5.667Al2.333)Ξ£8 O22 ((OH)1.622O0.378)Ξ£2. With exception of a slightly high A content (1.061 apfu), Holm's data normalizes well. However, his other analyses show a too high C3+ content, and the interpretation of this analysis as ferro-ferri-sadanagaite is therefore questioned.
Reference: Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana.Β American Mineralogist: Journal of Earth and Planetary Materials,Β 56(11-12), 2111-2122.
Locock, A. J. (2014): An Excel spreadsheet to classify chemical analyses of amphiboles following the IMA 2012 recommendations. Computers & Geosciences 62, 1-11. |
β Fluorite Formula: CaF2 Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β 'Garnet Group' Formula: X3Z2(SiO4)3 Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Grossular Formula: Ca3Al2(SiO4)3 Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Hastingsite Formula: NaCa2(Fe2+4Fe3+)(Si6Al2)O22OH2 Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Microcline Formula: K(AlSi3O8) Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston.
Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Muscovite Formula: KAl2(AlSi3O10)(OH)2 Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Nepheline Formula: Na3K(Al4Si4O16) Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston.
Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Potassic-ferro-ferri-taramite ? Formula: K(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2 Description: Holm (1974) provide a wet-chemical analysis corresponding to potassic-ferro-ferri-taramite:
SiO2, 37.58%
TiO2, 1.66%
Al2O3, 15.11%
Fe2O3, 20.75%
FeO, 9.25%
MnO, 1.06%
MgO, 1.06%
CaO, 5.53%
Na2O, 5.1%
K2O, 2.8%
When this is normalized (using Locock 2014), the empirical formula becomes (K0.55Na0.434)Ξ£0.984 (Na1.088Ca0.912)Ξ£2 (FeIII2.404Feii1.191Al0.526Mg0.243Ti0.192Mnii0.138)Ξ£4.694 (Si5.785Al2.215)Ξ£8 O22 ((OH)1.615O0.385)Ξ£2. This gives a low total in the C position ( 4.694) of which 3.122 apfu is trivalent. Both of these indicate analytical errors. Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston.
Locock, A. J. (2014): An Excel spreadsheet to classify chemical analyses of amphiboles following the IMA 2012 recommendations. Computers & Geosciences 62, 1-11. |
β Potassic-ferro-sadanagaite ? Formula: {K}{Ca2}{Fe2+3Al2}(Al3Si5O22)(OH)2 Description: Holm (1974) provide a wet-chemical analysis corresponding to potassic-ferro-sadanagaite:
SiO2, 35.52%
TiO2, 1.798%
Al2O3, 19.57%
Fe2O3, 6.51%
FeO, 18.45%
MnO, 0.51%
MgO, 2.72%
CaO, 9.27%
Na2O, 2.84%
K2O, 2.58%
When this is normalized (using Locock 2014), the empirical formula becomes (K0.509Na0.509)Ξ£1.018 (Ca1.537Na0.343Mn0.067Fe0.052)Ξ£1.999 (Feii2.336Al1.069FeIII0.758Mg0.628Ti0.209)Ξ£5 (Si5.498Al2.502)Ξ£8 O22 ((OH)1.581O0.419)Ξ£2. With exception of a slightly high A content (1.018 apfu), Holm's data normalizes well. However, his other analyses show a too high C3+ content, and the interpretation of this analysis as potassic-ferro-sadanagaite is therefore questioned. Reference: Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana.Β American Mineralogist: Journal of Earth and Planetary Materials,Β 56(11-12), 2111-2122.
Locock, A. J. (2014): An Excel spreadsheet to classify chemical analyses of amphiboles following the IMA 2012 recommendations. Computers & Geosciences 62, 1-11. |
β Quartz Formula: SiO2 Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β 'Sodic amphibole' Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Titanite Formula: CaTi(SiO4)O Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Vesuvianite Formula: Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
β Zircon Formula: Zr(SiO4) Reference: Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 3 - Halides | |||
---|---|---|---|
β | Fluorite | 3.AB.25 | CaF2 |
Group 4 - Oxides and Hydroxides | |||
β | Quartz | 4.DA.05 | SiO2 |
Group 5 - Nitrates and Carbonates | |||
β | Calcite | 5.AB.05 | CaCO3 |
Group 9 - Silicates | |||
β | Aegirine-augite | 9.DA.20 | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 |
β | Albite | 9.FA.35 | Na(AlSi3O8) |
β | Andradite | 9.AD.25 | Ca3Fe3+2(SiO4)3 |
β | Augite | 9.DA.15 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
β | Cancrinite | 9.FB.05 | (Na,Ca,β»)8(Al6Si6O24)(CO3,SO4)2 Β· 2H2O |
β | Epidote | 9.BG.05a | {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH) |
β | 'Ferro-ferri-sadanagaite' ? | 9.DE.15 | {Na}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)(OH)2 |
β | Grossular | 9.AD.25 | Ca3Al2(SiO4)3 |
β | Hastingsite | 9.DE.15 | NaCa2(Fe2+4Fe3+)(Si6Al2)O22OH2 |
β | Microcline | 9.FA.30 | K(AlSi3O8) |
β | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
β | Nepheline | 9.FA.05 | Na3K(Al4Si4O16) |
β | Potassic-ferro-ferri-taramite ? | 9.DE.20 | K(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2 |
β | Potassic-ferro-sadanagaite ? | 9.DE.15 | {K}{Ca2}{Fe2+3Al2}(Al3Si5O22)(OH)2 |
β | Titanite | 9.AG.15 | CaTi(SiO4)O |
β | Vesuvianite | 9.BG.35 | Ca19Fe3+Al4(Al6Mg2)(β»4)β»[Si2O7]4[(SiO4)10]O(OH)9 |
β | Zircon | 9.AD.30 | Zr(SiO4) |
Unclassified Minerals, Rocks, etc. | |||
β | 'Allanite Group' | - | {A12+REE3+}{M13+M23+M32+}(Si2O7)(SiO4)O(OH) |
β | 'Amphibole Supergroup' | - | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
β | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
β | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
β | 'Garnet Group' | - | X3Z2(SiO4)3 |
β | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
β | 'Sodic amphibole' | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Epidote | {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH) |
H | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
H | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
H | β Hastingsite | NaCa2(Fe42+Fe3+)(Si6Al2)O22OH2 |
H | β Apatite | Ca5(PO4)3(Cl/F/OH) |
H | β Allanite Group | {A12+REE3+}{M13+M23+M32+}(Si2O7)(SiO4)O(OH) |
H | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
H | β Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
H | β Muscovite | KAl2(AlSi3O10)(OH)2 |
H | β Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
H | β Potassic-ferro-sadanagaite | {K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2 |
H | β Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2 |
C | Carbon | |
C | β Calcite | CaCO3 |
C | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
O | Oxygen | |
O | β Epidote | {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH) |
O | β Nepheline | Na3K(Al4Si4O16) |
O | β Albite | Na(AlSi3O8) |
O | β Microcline | K(AlSi3O8) |
O | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
O | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
O | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
O | β Hastingsite | NaCa2(Fe42+Fe3+)(Si6Al2)O22OH2 |
O | β Titanite | CaTi(SiO4)O |
O | β Apatite | Ca5(PO4)3(Cl/F/OH) |
O | β Zircon | Zr(SiO4) |
O | β Allanite Group | {A12+REE3+}{M13+M23+M32+}(Si2O7)(SiO4)O(OH) |
O | β Calcite | CaCO3 |
O | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
O | β Garnet Group | X3Z2(SiO4)3 |
O | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
O | β Andradite | Ca3Fe23+(SiO4)3 |
O | β Grossular | Ca3Al2(SiO4)3 |
O | β Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
O | β Muscovite | KAl2(AlSi3O10)(OH)2 |
O | β Quartz | SiO2 |
O | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
O | β Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
O | β Potassic-ferro-sadanagaite | {K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2 |
O | β Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2 |
F | Fluorine | |
F | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
F | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
F | β Apatite | Ca5(PO4)3(Cl/F/OH) |
F | β Fluorite | CaF2 |
Na | Sodium | |
Na | β Nepheline | Na3K(Al4Si4O16) |
Na | β Albite | Na(AlSi3O8) |
Na | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
Na | β Hastingsite | NaCa2(Fe42+Fe3+)(Si6Al2)O22OH2 |
Na | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
Na | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Na | β Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
Na | β Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2 |
Mg | Magnesium | |
Mg | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
Mg | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
Mg | β Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
Mg | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Al | Aluminium | |
Al | β Epidote | {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH) |
Al | β Nepheline | Na3K(Al4Si4O16) |
Al | β Albite | Na(AlSi3O8) |
Al | β Microcline | K(AlSi3O8) |
Al | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
Al | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
Al | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
Al | β Hastingsite | NaCa2(Fe42+Fe3+)(Si6Al2)O22OH2 |
Al | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
Al | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Al | β Grossular | Ca3Al2(SiO4)3 |
Al | β Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
Al | β Muscovite | KAl2(AlSi3O10)(OH)2 |
Al | β Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
Al | β Potassic-ferro-sadanagaite | {K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2 |
Al | β Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2 |
Si | Silicon | |
Si | β Epidote | {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH) |
Si | β Nepheline | Na3K(Al4Si4O16) |
Si | β Albite | Na(AlSi3O8) |
Si | β Microcline | K(AlSi3O8) |
Si | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
Si | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
Si | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
Si | β Hastingsite | NaCa2(Fe42+Fe3+)(Si6Al2)O22OH2 |
Si | β Titanite | CaTi(SiO4)O |
Si | β Zircon | Zr(SiO4) |
Si | β Allanite Group | {A12+REE3+}{M13+M23+M32+}(Si2O7)(SiO4)O(OH) |
Si | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
Si | β Garnet Group | X3Z2(SiO4)3 |
Si | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Si | β Andradite | Ca3Fe23+(SiO4)3 |
Si | β Grossular | Ca3Al2(SiO4)3 |
Si | β Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
Si | β Muscovite | KAl2(AlSi3O10)(OH)2 |
Si | β Quartz | SiO2 |
Si | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Si | β Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
Si | β Potassic-ferro-sadanagaite | {K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2 |
Si | β Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2 |
P | Phosphorus | |
P | β Apatite | Ca5(PO4)3(Cl/F/OH) |
S | Sulfur | |
S | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
Cl | Chlorine | |
Cl | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
Cl | β Apatite | Ca5(PO4)3(Cl/F/OH) |
K | Potassium | |
K | β Nepheline | Na3K(Al4Si4O16) |
K | β Microcline | K(AlSi3O8) |
K | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
K | β Muscovite | KAl2(AlSi3O10)(OH)2 |
K | β Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
K | β Potassic-ferro-sadanagaite | {K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2 |
Ca | Calcium | |
Ca | β Epidote | {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH) |
Ca | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
Ca | β Hastingsite | NaCa2(Fe42+Fe3+)(Si6Al2)O22OH2 |
Ca | β Titanite | CaTi(SiO4)O |
Ca | β Apatite | Ca5(PO4)3(Cl/F/OH) |
Ca | β Calcite | CaCO3 |
Ca | β Fluorite | CaF2 |
Ca | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
Ca | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Ca | β Andradite | Ca3Fe23+(SiO4)3 |
Ca | β Grossular | Ca3Al2(SiO4)3 |
Ca | β Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
Ca | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Ca | β Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
Ca | β Potassic-ferro-sadanagaite | {K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2 |
Ca | β Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2 |
Ti | Titanium | |
Ti | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
Ti | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
Ti | β Titanite | CaTi(SiO4)O |
Fe | Iron | |
Fe | β Epidote | {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH) |
Fe | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
Fe | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
Fe | β Hastingsite | NaCa2(Fe42+Fe3+)(Si6Al2)O22OH2 |
Fe | β Andradite | Ca3Fe23+(SiO4)3 |
Fe | β Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
Fe | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Fe | β Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
Fe | β Potassic-ferro-sadanagaite | {K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2 |
Fe | β Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2 |
Zr | Zirconium | |
Zr | β Zircon | Zr(SiO4) |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 93.
Allen, J. B., & Charsley, T. J. (1968). Nepheline-syenite and Phonolite. HMSO.
Holm, R. F. (1971). Some garnets, pyroxenes, and amphiboles from nepheline gneisses in Ghana. American Mineralogist: Journal of Earth and Planetary Materials, 56(11-12), 2111-2122.
Holm, R. F. (1974). Petrology of alkalic gneiss in the Dahomeyan of Ghana. Geological Society of America Bulletin, 85(9), 1441-1448. doi.org/10.1130/0016-7606(1974)85<1441:POAGIT>2.0.CO;2
Kesse, G. O. (1985). The mineral and rock resources of Ghana. Balkema, Rotterdam and Boston.
Other Regions, Features and Areas containing this locality
African PlateTectonic Plate
West AfricaUN Subregion
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