The geological feature, geochemistry and origin of Jinya gold deposit in Fengshan, Guangxi

作     者：ZHOU Jiyuan~1, CUI Bingfang~1 and LU Yan~2 1. Nanjing Institute of Geology and Mineral Resources, Nanjing 210016, China 2. Chengdu Institute of Technology, Chengdu 610059, China 

作者机构：Nanjing Institute of Geology and Mineral Resources Nanjing 210016 China Chengdu Institute of Technology Chengdu 610059 China 

出 版 物：《Chinese Science Bulletin》 (科学通报(英文版))

年 卷 期：1999年第44卷第S2期

页      面：168-169页

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

主　　题：geological feature Jinya gold deposit Fengshan. 

摘      要：1 Geological feature of deposit The Jinya gold deposit is a fine disseminated gold mine. It occurs in sandstone and mudstone ofMiddle-Triassic Baifeng Formation, which is located at the margin of Late Paleozoic carbonate platform. Itwas controlled by the fracture zone, cleavage zone and fissure zone. The gold deposit has 15 orebodies,which are displayed as beds, lens and veins. The dominating minerals with gold are pyrite and arsenopyrite. The gold mainly occurs as submicroscopic intergranular gold. Low-to-moderate temperature (130-305℃) wall-rock alterations are mainly silicification, pyritization and arsenopyrite, also includes realgarization, carbonation (calcite, dolomite), sericitization and argillation (kaolinite, pyrophyllite). It wasformed after undergoing the sedimentary diagenetic period, hydrothermal mineralization epoch (213 Ma)and supergene mineralization.