Abstract
Late Paleozoic and Early Mesozoic epochs in the formation history of the Central Asian Foldbelt are distinguished by high rare-metal productivity. A number of large REE, Ta, Nb, Zr, Be, Sn, Li, Mo, Re, and other deposits were formed at that time. As a rule, they are of the magmatic origin and related to the intrusions of highly evolved igneous rocks varying in composition from alkaline ultramafic with carbonatites to alkali and Li-F granites. In general, the occurrences of rare-metal magmatism are related to the rift zones of the Central Asian Rift System formed 310–190 Ma ago and conjugated with a consecutive series of the Barguzin, Hangay, and Hentiy zonal igneous provinces characterized by the large batholiths in their centers and rift zones in the framework. Such a structure indicates that these provinces were formed above isometric mantle sources or plumes with participation of large-scale crustal anatexis. The evident links of rare-metal deposits to occurrences of mantle magmatism within the zonal igneous provinces show that plume sources played an important role in their formation.
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Original Russian Text © V.V. Yarmolyuk, M.I. Kuzmin, 2012, published in Geologiya Rudnykh Mestorozhdenii, 2012, Vol. 54, No. 5, pp. 375–399.
This paper is dedicated to the memory of Academician Vyacheslav Ivanovich Kovalenko—eminent Russian geologist and petrologist
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Yarmolyuk, V.V., Kuzmin, M.I. Late Paleozoic and Early Mesozoic rare-metal magmatism of Central Asia: Stages, provinces, and formation settings. Geol. Ore Deposits 54, 313–333 (2012). https://doi.org/10.1134/S1075701512050054
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DOI: https://doi.org/10.1134/S1075701512050054