| Issues on China Regional Metallogeny |
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| 作者姓名： | Zhai Yusheng Deng Jun Peng Runmin Faculty of Earth Sciences and Mineral Resources China University of Geosciencs Beijing China |
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| 作者单位： | Zhai Yusheng Deng Jun Peng Runmin Faculty of Earth Sciences and Mineral Resources，China University of Geosciencs，Beijing 100083，China |
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| 基金项目： | The study is supported financially by the State“973”High-Tech Project( No.G19990 43 2 0 0 -15 ) and the Key Project of the Fo |
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| 摘 要： | In recent years,the study of regional metallogeny,anim portant field in the study of ore deposit geology,has at-tracted much attention from worldwide geologists.Its purposeis to illustrate regularities of m ineralization and distribution ofore deposits and provide a scientific basis for regional explo-ration and appraisementof potential minerals.This paper pro-poses several tentative opinions pertaining to regional metal-logeny of China.The discussion in this paper may improve ourunderstanding…
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Issues on China Regional Metallogeny |
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| Zhai Yusheng Deng Jun Peng Runmin Faculty of Earth Sciences and Mineral Resources,China University of Geosciencs,Beijing ,China.Issues on China Regional Metallogeny[J].Journal of China University of Geosciences,2000,11(3). |
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| Authors: | Zhai Yusheng Deng Jun Peng Runmin |
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| Abstract: | According to geotectonic evolution and regional lithospheric features, the authors proposed six metallogenic domains in China: (1) Tianshan-Xingmeng metallogenic domain, (2) Tarim-North China metallogenic domain, (3) Qinling-Qilian-Kunlun metallogenic domain, (4) Yangtze metallogenic domain, (5) South China metallogenic domain and (6) Himalaya-Sanjiang metallogenic domain. In this paper, the authors also discuss, on the bases of geotectonic background and metallogenic evolutionary history, some metallogenic features of China: (1) A large percentage of ore formation occurred in paleo-continental margins, including continental marginal rift and continental marginal accretionary orogenic belt. The majority of main mineral deposits are discovered on continental margins. (2) Superimposition of mineralization, favored the building up of giant and large mineral deposits, but often made the mineral deposits more complex in composition (associated components), morphology and structure. (3) Mineralization of crust-derived anatectic granite is intensive and especially concentrated in the South China metallogenic domain. Mineralizations, including W, Sn and REE, are the products of long and mature development of W-Sn-polymetal-rich earth-crust in the metamorphic basement of South China Caledonian fold belt. (4) Epithermal ore-forming system is well developed in the southwest part of Yangtze continental block.Ore deposits of Hg, Sb, As, Au, Ag and U densely occur in sedimentary strata of the Late Paleozoic to Triassic. Ge, TI, Te can also constitute independent ore deposits. (5) Ore formation caused by tectonic dynamic activities is distinctive. Small-scale continental blocks of China display intensive activities, which played a widespread and diverse role in ore control. Junctions of faults, synchronous faults, shear zone structure and metamorphic core complex are main ore-control structures. (6) The gold mineralization is complex and diversified. The greenstone-type gold ores in China were emplaced in the Mesozoic Yanshanian epoch after repeated mineralization and enrichment. As a result, the co-product gold constituted 32% of the gold output of China. (7) The mineralization is characterized by multiple stages and heterogeneity. The metallogenic epoch of China almost covers all geological periods. The general trend, the increase in intensity with time, culminates in Mesozoic-Cenozoic and so do the varieties of ores and typés of mineral deposits. (8) Ore mineralization culminated on continental margin in the Mesozoic, especially in the Yanshanian orogeny of the east part of China, resulting in the diversity of ores and intensive mineralization.These metallogeny features of China can be generalized as "composite continental metallogenic system'. |
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| Keywords: | metallogenic domain metallogenic feature composite continental metallogenic system China |
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