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Protolith-controlled superposition of Sn-(W) and Cu-Mo mineralization: Examples from the Jurassic and cretaceous granite-related mineralization in the coastal region of southeastern China
Lithos ( IF 3.5 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.lithos.2020.105816
Wenting Huang , Huaying Liang , Long Ren , Xilian Chen , Jian Zhang , Kaixuan Li

Abstract Sn (W) and Cu-Mo have distinct geochemical behaviors during magmatic evolution, thus these two group deposits are seldom superposed. Specially, the Mesozoic granite-related Sn-W/W-Sn and Mo-Cu/Cu-Mo deposits in south China are spatial overlapped, with some are even temporal-coincided. To reveal the factors controlling the distribution and the locally coeval occurrence of different mineralization types, here we compared the ages, sources compositions, and tectonic settings of the Jurassic Zijinshan Sn-rich granite, the Jurassic Gutian porphyry Mo-Cu deposit, and the Cretaceous Luoboling porphyry Cu-Mo deposit from the southeastern (SE) China. The results indicate that the Jurassic Sn-W and Mo-Cu rich magmas were derived from Paleoproterozoic meta-sedimentary and meta-basaltic rocks, respectively, through partial melting (>850 °C) along the suture zones triggered by asthenospheric upwelling in the intra-plate extensional setting. The Cretaceous porphyry Cu-Mo deposit was formed by water-flux melting (
更新日期:2021-01-01
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