 | 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 |  | 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 (volume) | | On the cover: Map of the Carpathian region with type localities of new mineral species, rocks, fossil...(see the inside of the front cover for members) Field trip Subcommittee Friedrich Koller, Co-Chairman...the front cover of the field trip guides, Acta Mineralogica-Petrographica, Field Guide Series, Vol. 1–29...AM15 Gas storage in minerals: Experimental and field studies ...........................................301 EG56C4 Industrial clay deposits: From the field to the industry ............................... |
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