Rare-Metal Pegmatite Deposits of the Kalba Region, Eastern Kazakhstan: Age, Composition and Petrogenetic Implications
| Autor: | Sergey Smirnov, Alexey V. Travin, Bakytgul’ B. Agaliyeva, Boris Dyachkov, S. V. Khromykh, Tatiana A. Oitseva, Marina Mizernaya, Oxana N. Kuzmina, Alexander Vladimirov, P.D. Kotler, E. N. Sokolova |
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| Rok vydání: | 2020 |
| Předmět: |
Mineralization (geology)
lcsh:QE351-399.2 010504 meteorology & atmospheric sciences Pluton Geochemistry engineering.material 010502 geochemistry & geophysics 01 natural sciences chemistry.chemical_compound rare-metal pegmatites Age composition Lepidolite Ar-Ar isotope age Pegmatite 0105 earth and related environmental sciences lcsh:Mineralogy Muscovite Eastern Kazakhstan Geology Geotechnical Engineering and Engineering Geology Silicate chemistry Batholith engineering Kalba granite batholith |
| Zdroj: | Minerals Volume 10 Issue 11 Minerals, Vol 10, Iss 1017, p 1017 (2020) |
| ISSN: | 2075-163X |
| Popis: | The paper presents new geological, mineralogical, and isotope geochronological data for rare-metal pegmatites in the Kalba granitic batholith (Eastern Kazakhstan). Mineralization is especially abundant in the Central-Kalba ore district, where pegmatite bodies occur at the top of large granite plutons and at intersections of deep faults. The pegmatites contain several successive mineral assemblages from barren quartz-microcline and quartz-microcline-albite to Li-Cs-Ta-Nb-Be-Sn-bearing cleavelandite-lepidolite-spodumene. Ar-Ar muscovite and lepidolite ages bracket the metallogenic event between 291 and 286 Ma. The pegmatite mineral deposits formed synchronously with the emplacement of the phase 1 Kalba granites during the evolution of hydrous silicate rare-metal magmas that are produced by the differentiation of granite magma at large sources with possible inputs of F and rare metals with fluids. |
| Databáze: | OpenAIRE |
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