Geology and mineralization of the Sanshandao supergiant gold deposit(1200 t)in the Jiaodong Peninsula,China:A review  

作　　者：Ming-chun Song Zheng-jiang Ding Jun-jin Zhang Ying-xin Song Jun-wei Bo Yu-qun Wang Hong-bo Liu Shi-yong Li Jie Li Rui-xiang Li in Wang Xiang-dong Liu Liang-liang Zhang Lei-lei Dong Jian Li Chun-yan He 

机构地区：[1]Shandong Provincial No.6 Exploration Institute of Geology and Mineral Resources,Weihai 264209,China [2]Shandong Provincial Bureau of Geology and Mineral Resources,Jinan 250013,China [3]Shandong Provincial No.3 Exploration Institute of Geology and Mineral Resources,Yantai 264003,China [4]Shandong Institute of Geological Sciences,Jinan 250013,China [5]Shandong Provincial Ruihai Mining Limited Company,Laizhou 261400,China [6]Shandong Institute of Geophysical&Geochemical Exploration,Jinan 250013,China [7]Hebei Key Laboratory of Strategic Critical Mineral Resources,Hebei GEO University,Shijiazhuang 050031,China [8]School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China [9]School of Resources and Environmental Engineering,Shandong University of Technology,Zibo 255000,China

出　　处：《China Geology》2021年第4期686-719,共34页中国地质（英文）

基　　金：by the NSFC-Shandong Joint Fund Program entitled“Control Mechanisms of Faults on Deep Gold Deposits in Jiaodong Peninsula”(U2006201).

摘　　要：The Jiaodong Peninsula in Shandong Province,China is the world’s third-largest gold metallogenic area,with cumulative proven gold resources exceeding 5000 t.Over the past few years,breakthroughs have been made in deep prospecting at a depth of 500‒2000 m,particularly in the Sanshandao area where a huge deep gold orebody was identified.Based on previous studies and the latest prospecting progress achieved by the project team of this study,the following results are summarized.(1)3D geological modeling results based on deep drilling core data reveal that the Sanshandao gold orefield,which was previously considered to consist of several independent deposits,is a supergiant deposit with gold resources of more than 1200 t(including 470 t under the sea area).The length of the major orebody is nearly 8 km,with a greatest depth of 2312 m below sea level and a maximum length of more than 3 km along their dip direction.(2)Thick gold orebodies in the Sanshandao gold deposit mainly occur in the specific sections of the ore-controlling fault where the fault plane changes from steeply to gently inclined,forming a stepped metallogenic model from shallow to deep level.The reason for this strong structural control on mineralization forms is that when ore-forming fluids migrated along faults,the pressure of fluids greatly fluctuated in fault sections where the fault dip angle changed.Since the solubility of gold in the ore-forming fluid is sensitive to fluid pressure,these sections along the fault plane serve as the target areas for deep prospecting.(3)Thermal uplifting-extensional structures provide thermodynamic conditions,migration pathways,and deposition spaces for gold mineralization.Meanwhile,the changes in mantle properties induced the transformation of the geochemical properties of the lower crust and magmatic rocks.This further led to the reactivation of ore-forming elements,which provided rich materials for gold mineralization.(4)It can be concluded from previous research results that the gold mineralization in the Ji

关 键 词：Gold deposit Deep prospecting Thermal uplifting-extension mineralization Transformation of mantle properties Stepped metallogenic model Mineral exploration engineering Jiaodong-type gold deposits Sanshandao Jiaodong Peninsula China 

分 类 号：P618.51[天文地球—矿床学]