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Geology and mineralization of the dayin’gezhuang supergiant gold deposit(180 t)in the Jiaodong Peninsula,China:A review

引用

China Geology 2022年第4期5卷 696-721页

作者： Xiang-dong Liu Zheng-jiang Ding Ming-chun Song Ming-ling Zhou Shao-hui Xu Zhen-liangYang Tian-ci Xie Tao Cui Ying-xin Song Xue-kan Gao Rui-xiang Li Liang-liang Zhang Qi-bin Zhang Shan-shan Wang Bin Wang No.6 Geological Team of Shandong Provincial Bureau of Geology and Mineral Resources Weihai 264209China Ministry of Natural Resources Technology Innovation Center for Deep Gold Resources Exploration and Mining Weihai 264209China State Key Laboratory of Geological Process and Mineral Resources China University of Geosciences(Beijing)Beijing 100083China Hebei Key Laboratory of Strategic Critical Mineral Resources Hebei GEO UniversityShijiazhuang 050031China Shandong Institute of Geological Sciences Jinan 250013China dayin’gezhuang Gold Company Zhaojin Mining Co.Ltd.Zhaoyuan 264000China

The dayin’gezhuang gold deposit is located in the central part of the Zhaoping Fault metallogenic belt in the Jiaodong gold province-the world’s third-largest gold metallogenic *** is a typical successful case of prospecting at a depth of 500-2000 m in recent years,with cumulative proven gold resources exceeding 180 *** main orebodies(No.1 and No.2 orebody)generally have a pitch direction of NNE and a plunge direction of *** the ore-controlling fault,the Zhaoping Fault is a shovel-shaped stepped fault,with its dip angle presenting stepped high-to-low transitions at the elevation of -2000-0 *** gold mineralization enrichment area is mainly distributed in the step parts where the fault plane changes from steeply to gently,forming a stepped metallogenic pattern from shallow to *** can be concluded from previous studies that the gold mineralization of the dayin’gezhuang gold deposit occurred at about 120 *** ore-forming fluids were H_(2)O-CO_(2)-NaCl-type hydrothermal solutions with a medium-low temperature and medium-low *** H-O isotopic characteristics indicate that the fluids in the early ore-forming stage were possibly magmatic water or mantle water and that meteoric water gradually entered the ore-forming fluids in the late ore-forming *** S and Pb isotopes indicate that the ore-forming materials mainly originate from the lower crust and contain a small quantity of mantle-derived *** comprehensive analysis shows that the dayin’gezhuang gold deposit was formed by thermal uplifting-extensional *** strong crust-mantle interactions,large-scale magmatism,and the material exchange arising from the transformation from adakitic granites to arc granites and from the ancient lower crust to the juvenile lower crust during the Early Cretaceous provided abundant fluids and material sources for ***,the detachment faults formed by the rapid magmatic uplift and the extensional tectonism created favorable tem

关键词： Stepped metallogenic model Thermal uplifting-extension mineralization Geological characteristics Supergiant gold deposit Zhaoping metallogenic belt Jiaodong gold province Mineral exploration engineering dayin’gezhuang Shandong Province China

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