2 documents found, page 1 of 1
Li-rich pegmatites and related peraluminous granites of the Fregeneda-Almendra ...
Roda-Robles, E; Vieira, R; Lima, A; Errandonea-Martin, J; Pesquera, A; Cardoso-Fernandes, J; Garate-Olave, IBased on field and petrographic observations, mineralogical, geochemical (whole-rock by ICP-MS, ICP-OES, ISE and PGNAA) and geochronological (Ar-Ar on mica and U-Pb on columbite) data, ten pegmatite types and one type of cassiterite-rich quartz hydrothermal veins have been distinguished in the Fregeneda-Almendra field (FA) (Central Iberian Zone), some of them highly enriched in Li (included in petalite, spodume...
Compositional Variations in Apatite and Petrogenetic Significance: Examples fro...
Roda-Robles, E; Gil-Crespo, PP; Pesquera, A; Alexandre Lima; Garate-Olave, I; Merino-Martinez, E; Cardoso-Fernandes, J; Errandonea-Martin, JApatite can be used as an archive of processes occurring during the evolution of granitic magmas and as a pegmatite exploration tool. With this aim, a detailed compositional study of apatite was performed on different Variscan granites, pegmatites and quartz veins from the Central Iberian Zone. Manganese in granitic apatite increases with increasing evolution degree. Such Mn increase would not be related to cha...