 | Martins, T., Lima, A., Simmons, W. B., Falster, A. U., Noronha, F. (2011) GEOCHEMICAL FRACTIONATION OF Nb-Ta OXIDES IN Li-BEARING PEGMATITES FROM THE BARROSO-ALVAO PEGMATITE FIELD, NORTHERN PORTUGAL. The Canadian Mineralogist, 49 (3) 777-791 doi:10.3749/canmin.49.3.777 | Journal (article/letter/editorial) | | Li-BEARING PEGMATITES FROM THE BARROSO–ALVÃO PEGMATITE FIELD, NORTHERN PORTUGAL Tânia MARTINS§ Geology Centre...University of Porto, Rua do Campo Alegre, 687, Porto, Portugal Alexandre LIMA Geology Centre, and Department...University of Porto, Rua do Campo Alegre, 687, Porto, Portugal William B. SIMMONS and Alexander U. FALSTER Department...Porto, Portugal Abstract The Barroso–Alvão granitic pegmatite field, located in northern Portugal, is known...petalite-bearing bodies. Recent work on this pegmatite field characterized other types of pegmatites, and |  | Novák, Milan, Vieira, Romeu, Lima, Alexandre, Škoda, Radek, Martins, Tania, dos Anjos Ribeiro, Maria (2009) Ferronigerite with dominant substitution TiSn−1 in muscovite+chlorite aggregate from massive quartz nodule associated with a petalite-rich aplite-pegmatite of the Barroso-Alvão pegmatite field, Northern Portugal. Neues Jahrbuch für Mineralogie - Abhandlungen, 186 (1) 67-78 doi:10.1127/0077-7757/2009/0132 | Journal (article/letter/editorial) | | petalite-rich aplite-pegmatite of the Barroso-Alvão pegmatite field, Northern Portugal Milan Novák, Romeu...petalite-rich aplite-pegmatite dike Lousas from the Barroso-Alvão pegmatite field. Ferronigerite-6N6S...quartz nodule, petalite, aplite-pegmatite, Barroso-Alvão field, Portugal Introduction Nigerite-group minerals...Lousas aplite-pegmatite body intruding metasedimentary rocks, Barroso-Alvão pegmatite field. Grey area –...– aplite-pegmatite body, square – quartz nodule occurrence. b) Schematic description of geological setting |  | | Journal (article/letter/editorial) | | EVOLUTION OF MICAS IN THE BARROSO–ALVÃO PEGMATITE FIELD, NORTHERN PORTUGAL Tânia MARTINS§ Geology Centre...University of Porto, Rua do Campo Alegre, 687, Porto, Portugal Encarnación RODA-ROBLES Dpto. Mineralogia y Petrologia...University of Porto, Rua do Campo Alegre, 687, Porto, Portugal Philippe de Parseval Géosciences Environnement...the granitic pegmatites found in the Barroso–Alvão pegmatite field and the Cabeceiras de Basto granite...paragenesis. This pegmatite field in northern Portugal has numerous and varied aplite–pegmatite intrusions as |  | Marchal, Karen L., Simmons, William B., Falster, Alexander U., Webber, Karen L., Roda-Robles, Encarnación (2014) GEOCHEMISTRY, MINERALOGY, AND EVOLUTION OF Li-Al MICAS AND FELDSPARS FROM THE MOUNT MICA PEGMATITE, MAINE, USA. The Canadian Mineralogist, 52 (2) 221-233 doi:10.3749/canmin.52.2.221 | Journal (article/letter/editorial) | | Li-Al MICAS AND FELDSPARS FROM THE MOUNT MICA PEGMATITE, MAINE, USA Karen L. MARCHAL§, William B. SIMMONS...Mount Mica is a poorly zoned, sodic LCT-type pegmatite consisting dominantly of quartz, albite, and muscovite...portion of the pegmatite. Micas are the principal K minerals throughout the pegmatite. Potassium feldspar...pollucite are restricted to the core zone of the pegmatite. The dearth of rare element (Li, F, Cs, and Rb)...substitution in minerals of the outer portion of the pegmatite and the relatively low K/ Rb ratio of K-feldspar |  | Roda-Robles, Encarnación, Gil-Crespo, Pedro Pablo, Pesquera, Alfonso, Lima, Alexandre, Garate-Olave, Idoia, Merino-Martínez, Enrique, Cardoso-Fernandes, Joana, Errandonea-Martin, Jon (2022) Compositional Variations in Apatite and Petrogenetic Significance: Examples from Peraluminous Granites and Related Pegmatites and Hydrothermal Veins from the Central Iberian Zone (Spain and Portugal) Minerals, 12 (11) 1401 doi:10.3390/min12111401 | Journal (article/letter/editorial) | | Veins from the Central Iberian Zone (Spain and Portugal) Encarnación Roda-Robles 1, *, Pedro Pablo Gil-Crespo...Veins from the Central Iberian Zone (Spain and Portugal). Minerals 2022, 12, 1401. https:// doi.org/10...Alegre, 4169-007 Porto, Portugal ICT (Institute of Earth Sciences)—Porto Pole (Portugal), Rua Campo Alegre...Alegre, 4169-007 Porto, Portugal Department of Geology and Subsurface, Centro Nacional Instituto Geológico...during the evolution of granitic magmas and as a pegmatite exploration tool. With this aim, a detailed compositional |  | | Journal (issue) | | in southwestern Fennoscandia: Backdrop to the pegmatite fields of southern Norway……………………………………………………………………………………...paleoclimate controls of lithium-cesium-tantalum (LCT) pegmatite genesis, exhumation, and preservation……………………...earth element mineralization in a rediscovered pegmatite in the Stettin Complex, Wausau Syenite Compley...Mineralogical study of the Gonçalo Li-pegmatite deposit, Portugal……………………………………..23 FALSTER, A.U., SIMMONS...fluorapatite-quartz assemblage in the Emmons pegmatite, Greenwood, Oxford Co., Maine, USA: implication |  | | Journal (article/letter/editorial) | | Isotopic compositions in the Monts d’Ambazac Pegmatite Field (French Massif Central) RI P T exhibit a...with the degree of magmatic evolution of each pegmatite type: from 630 ppm in Type II up to 13,500 ppm...ppm in the more evolved NU Type VI pegmatite. Although the rare-element contents e.g., Li, Cs, Ta of...of the micas are MA consistent with pegmatite differentiation, 7Li (‰) are firstly, independent of the...degree of magmatic differentiation (independent of pegmatite type) and secondly, independent ED of the content |  | | Journal (article/letter/editorial) | | Manuscript Geology and chemistry of Variscan-type pegmatite systems (SE Germany) With special reference to...Dill, Geology and chemistry of Variscan-type pegmatite systems (SE Germany) With special reference to...pertain. Geology and chemistry of Variscan-type pegmatite systems (SE Germany) - With special reference...D-30167 Hannover, Germany Abstract: The geology of pegmatite systems encompasses lithology, shape, and structure...Zn-Cu-Bi-Rb-Nb in), (2) supergene (Zr-Ti in). Key words: Pegmatite; lithology; structural geology; chemistry; Variscan-type |
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