Control of favorable lithology on Jinlongshan micro-fine disseminated gold deposits, southern Qinling Mountains |
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Authors: | Liqing Zhao and Zhongyan Feng |
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Institution: | 1. Research Center for Mineral Resources Exploration, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing100101, China 2. Department of Geology, Peking University, Beijing 100871, China |
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Abstract: | Jinlongshan gold orebelt, a newly discovered one in sedimentary rock region in southern Qinling Mountains, is mainly located
in upper Devonian and lower Carboniferous calcareous siltstone and argillic silty limestone of later Paleozoic era. Typical
disseminated gold mineralization occurred in calcareous siltstone, which is major host rock and mainly composed of silt (SiO2 mostly varies from 38% to 73%) and calcite (CaO mostly varies from 10% to 25%). Pyrite created by living beings in Nanyangshan
formation may be poor in gold. Faults and favorable layers jointly control disseminated gold mineralization. The significance
of this opinion is very great for gold exploration. |
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Keywords: | favorable lithology (permeable beds) for ore-controlling calcareous siltstone micro-fine disseminated gold deposit sediment-hosted gold deposit Carlin-type deposit Jinglongshan gold deposit southern Qinling Mountains Nanyangshan formation |
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