 | Gonçalves, , Melgarejo, , Alfonso, , Amores, , Paniagua, , Neto, , Morais, , Camprubí, (2019) The Distribution of Rare Metals in the LCT Pegmatites from the Giraúl Field, Angola. Minerals, 9 (10) 580 doi:10.3390/min9100580 | Journal (article/letter/editorial) | | Distribution of Rare Metals in the LCT Pegmatites from the Giraúl Field, Angola Antonio Olimpio Gonçalves 1 ,...de Fevreiro 71, Caixa Postal 815, Luanda 2131, Angola; tonygoncalves72@hotmail.com (A.O.G.); anbuneto@hotmail...Abstract: The Giraúl granitic pegmatite field in Angola is composed of five pegmatite types, the most evolved...beryl-columbite-phosphate and spodumene types. Pegmatites are concentrically zoned with increased grain...the most evolved pegmatites have well-developed replacement units. These pegmatites are rich in Nb-Ta |  | Alfonso, P., Melgarejo, J. C., Yusta, I., Velasco, F. (2003) GEOCHEMISTRY OF FELDSPARS AND MUSCOVITE IN GRANITIC PEGMATITE FROM THE CAP DE CREUS FIELD, CATALONIA, SPAIN. The Canadian Mineralogist, 41 (1) 103-116 doi:10.2113/gscanmin.41.1.103 | Journal (article/letter/editorial) | | FELDSPARS AND MUSCOVITE IN GRANITIC PEGMATITE FROM THE CAP DE CREUS FIELD, CATALONIA, SPAIN PURA ALFONSO§...Creus pegmatite field exhibits a well-defined regional zonation of four types of granitic pegmatite: barren...barren Kfeldspar-rich pegmatites (type I), beryl–columbite-subtype pegmatites (type II), beryl–columbite–phosphate-subtype...beryl–columbite–phosphate-subtype pegmatites (type III) and albite-type pegmatites (type IV). There is an increase in...K-feldspar, with increasing pegmatite evolution. Type-I microcline-rich pegmatites have low contents of albite |  | | Journal (article/letter/editorial) | | and intercalated orthogneiss calbonatitedykes/pegmatites (scale exaggeratedfor darity) trend lines of...Radian Ridge Nepheline Syenite and “carbonatite-type” dykes. B.A. Worley et al. / Lithos 35 (1995)...presence of numerous rafts and xenoliths (Fig. 2), field relations and mineralogy of the Dismal Nepheline...quartzites of the Koettlitz Group (Fig. 1). A pegmatite which cross-cuts the contact between the syenite...fluorite and calcite and accessory apatite and zircon. A contact parallel foliation defined by alignment |  | | Journal (article/letter/editorial) | | SOCIETY OF AMERICA JANUARY, 1935 No. I THE PEGMATITES OF FITCHBURG, MASSACHUSETTS C. SraNrrnro HrrcnnN...New England. The pegmatite bodies themselves are of an interesting and peculiar type and consistof a number...granite-so common in many of the New England pegmatites-is here entirely absent,and there is also little...needles. The accessoryminerals consistof apatite and zircon together with + A Commonwealth Fund fellow at Han'ard...of the principal tourmaline type pegmatites at Fitchburg. The pegmatites occur within the granite, sometimes |  | Van Lichtervelde, Marieke, Grand’Homme, Alexis, de Saint-Blanquat, Michel, Olivier, Philippe, Gerdes, Axel, Paquette, Jean-Louis, Melgarejo, Joan Carles, Druguet, Elena, Alfonso, Pura (2017) U-Pb geochronology on zircon and columbite-group minerals of the Cap de Creus pegmatites, NE Spain. Mineralogy and Petrology, 111 (1) 1-21 doi:10.1007/s00710-016-0455-1 | Journal (article/letter/editorial) | | geochronology on zircon and columbite-group minerals of the Cap de Creus pegmatites, NE Spain Marieke...Wien 2016 Abstract The Cap de Creus granitic pegmatites in the eastern Catalan Pyrenees were dated using...U-Pb geochronology by laser ablation ICP-MS on zircon and columbite-group minerals (CGM), which are present...types of pegmatites from type I (K-feldspar pegmatites, least evolved) to type IV (albite pegmatites, most...different pegmatitic pulses. In a type III pegmatite where zircon and CGM are co-genetically associated |  | Mall�, A., Fontan, F., Melgarejo, J. C., Mata, J. M. (1995) The Albera zoned pegmatite field, Eastern Pyrenees, France. Mineralogy and Petrology, 55 (1) 103-116 doi:10.1007/bf01162582 | Journal (article/letter/editorial) | | 1995 Printed in Austria The Albera zoned pegmatite field, Eastern Pyrenees, France A. Mall61, F. Fontan...of pegmatites comprise the zoned pegmatite feld in the eastern sector of the Albera Massif. Type I is...is represented by barren pegmatites with graphic textures; type II comprises transitional varieties with...scarce N b - T a and U oxide minerals; type III consists of pegmatites with significant zones of replacement...b - T a oxide minerals; and type IV, muscovite-quartz-albite pegmatites are highly mineralized with Be |  | | Journal (article/letter/editorial) | | Austria Nb-Ta-Minerals from the Cap de Creus pegmatite field, eastern Pyrenees: distribution and geochemical...mineralogy facilitate distinction of four main pegmatite types at the eastern end of the Pyrenees. Three...Nb) ratio increasing towards the more evolved pegmatites, Mn/(Mn + Fe) being relatively low and increasing...trend, with similar enrichment toward the late pegmatite units; a single-crystal trend, with zoning related...expected for a beryl-columbite pegmatite type. In a single pegmatite, the evolution depends on the simultaneous |  | | Journal (article/letter/editorial) | | FLUID EVOLUTION IN THE ZONED RARE-ELEMENT PEGMATITE FIELD AT CAP DE CREUS, CATALONIA, SPAIN Pura ALFONSO§...Spain Abstract The Cap de Creus LCT granitic pegmatites, in Catalonia, northeastern Spain, belong to...to the albite type. Fluid inclusions have been studied in all these types of pegmatite to determine the...involved in their formation. Beryl – columbite pegmatites are zoned; border, wall, intermediate zones and...distinguished. Beryl – columbite – phosphate pegmatites, in addition, feature veins of albite and quartz–muscovite |  | | Journal (article/letter/editorial) | | com/loi/tigr20 Geochemistry and origin of Chupa pegmatite range (North Karelia) V.A. Leonova Published online:...Leonova (1966) Geochemistry and origin of Chupa pegmatite range (North Karelia), International Geology Review...page/terms-and-conditions Geochemistry and origin of Chupa pegmatite range (North Karelia) V A leonova UDC 550. 4:553...relationship between the composition of host rocks and pegmatites is demonstrated by means of data on the contents...2014 - The granite pegmatites of North Karelia and in particular the pegmatite veins of the Chupa district |  | | Journal (article/letter/editorial) | | 49, PP. 733-8 Genesis of chrysoberyl in the pegmatites of southern Kerala, India K. SOMAN AND N. G....Kerala, India, chrysoberyl occurs in granitic pegmatites in association with quartz in alkali feldspar...crystallize earlier than beryl and sillimanite. The pegmatites are thought to have derived from the residual...chrysoberyl, pegmatites, Kerala, India. CHRYSOBERYL is rather rare in granitic pegmatites, though known...and Beus (1960) have postulated that granitic pegmatites with obvious aluminium contamination may contain |  | | Journal (article/letter/editorial) | | The genesis of LCT-type granitic pegmatites, as illustrated by lithium isotopes in micas... Villaros, Arnaud, The genesis of LCT-type granitic pegmatites, as illustrated by lithium isotopes in... ACCEPTED MANUSCRIPT The genesis of LCT-type granitic pegmatites, as illustrated by lithium isotopes in...Isotopic compositions in the Monts d’Ambazac Pegmatite Field (French Massif Central) RI P T exhibit a...of each pegmatite type: from 630 ppm in Type II up to 13,500 ppm in the more evolved NU Type VI pegmatite |  | | Journal (article/letter/editorial) | | of granite–pegmatite genetic relations: Characterization of the Pavia granitic pegmatites (Ossa-Morena...Pavia pluton “Common” pegmatites Incremental growth Juvenile source(s) Granite–pegmatite genetic relationship...a b s t r a c t It is generally accepted that pegmatites are derived from large masses of granite but...datasets are available, the relation between pegmatites and host granitic rocks or nearby plutons is... At the first glance, pegmatites seem to constitute a very homogeneous pegmatite field. They are mainly |
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