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Erschienen in:
2005 | OriginalPaper | Buchkapitel
Tectonic setting of epithermal deposits in mainland China
verfasst von : Jinqing Qi, Yanjing Chen, Franco Pirajno
Erschienen in: Mineral Deposit Research: Meeting the Global Challenge
Verlag: Springer Berlin Heidelberg
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This paper documents selected epithermal deposits in Mainland China. The deposits cluster in four regions, namely northeast china, northern margin of the North China craton, southeast China and northwest China. Geological and geochemical characteristics of the epithermal deposits are summarized and metallogenic trends are revealed. The ore-forming fluid-systems were dominated by meteoric water occasionally with inputs of magmatic fluid. Ore metals were mainly sourced from host-rocks and parent intrusions, with many deposits formed in epithermal-to-mesothermal conditions, suggesting a link with porphyry systems. Large-scale metallogenesis and magmatism postdated local oceanic closure by ca. 50 Ma, and was coeval with the transition from collisional compression to extension tectonic regime. Hence a model of collision-metallogeny-fluid flow (CMF) is applicable to interpret the origin of epithermal ore provinces in mainland China.