5 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...
Metasomatic aureoles of highly mobile elements related to evolved granitic apli...
Errandonea-Martin, J; Garate-Olave, I; Roda-Robles, E; Cardoso-Fernandes, J; Lima, A; Ribeiro, MdA; Teodoro, AC<jats:p><p>Granitic pegmatites represent an important source of numerous critical raw materials, and subsequently, the exploration of new deposits has become a crucial objective in the energy transition towards green technologies. Systematic studies of geochemical aureoles related to late-Variscan Lithium-Cesium-Tantalum (LCT) pegmatites at the Fregeneda&#8211;Almendra Pegmatite Field (Central Iberian...
Mineral chemistry and spectroscopy of metasedimentary host rocks of aplite-pegm...
Cardoso-Fernandes, J; Roda-Robles, E; Errandonea-Martin, J; Garate-Olave, I; Alexandre Lima; Ribeiro, MdA; De Almeida, C; Ana Teodoro
Metasomatic effect of Li-bearing aplite-pegmatites on psammitic and pelitic met...
Errandonea-Martin, J; Garate-Olave, I; Roda-Robles, E; Cardoso-Fernandes, J; Lima, A; Ribeiro, MD; Ana TeodoroFluid-assisted mass transfer and re-equilibration of mineral phases are common consequences of metasomatism associated with igneous intrusions. The addition and/or removal of chemical components in these environments may result in the generation of metasomatic aureoles, which can be recognized by their mineralogy and geochemistry. Due to an increasing demand for critical raw materials used in green energy techn...