| 北祁连山西段寒山金矿床成矿时代探讨 |
| Received:October 30, 2018 Revised:June 24, 2019 点此下载全文 |
| 引用本文：LIU YongBiao,YU JunPeng,KONG WeiQiong,FAN XinXiang,ZHAO JiChang,LI ShengYe,WANG Peng.2020.A study of ore-forming epoch of Hanshan deposit in western North Qilian Mountain[J].Mineral Deposits,39(1):135~146 |
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| Author Name | Affiliation | E-mail | | LIU YongBiao | Fourth Institute of Geological and Mineral Exploration of Gansu Bureau of Geology and Mineral Resources, Jiuquan 735000, Gansu, China | | | YU JunPeng | Fourth Institute of Geological and Mineral Exploration of Gansu Bureau of Geology and Mineral Resources, Jiuquan 735000, Gansu, China
Gansu Geological Survey Research Institute, Lanzhou 730000, Gansu, China | 33052368@qq.com | | KONG WeiQiong | Fourth Institute of Geological and Mineral Exploration of Gansu Bureau of Geology and Mineral Resources, Jiuquan 735000, Gansu, China
Lanzhou New Area County Natural Resource Bureau, Lanzhou 730000, Gansu, China | | | FAN XinXiang | Fourth Institute of Geological and Mineral Exploration of Gansu Bureau of Geology and Mineral Resources, Jiuquan 735000, Gansu, China | | | ZHAO JiChang | Fourth Institute of Geological and Mineral Exploration of Gansu Bureau of Geology and Mineral Resources, Jiuquan 735000, Gansu, China | | | LI ShengYe | Lanzhou New Area County Natural Resource Bureau, Lanzhou 730000, Gansu, China | | | WANG Peng | Fourth Institute of Geological and Mineral Exploration of Gansu Bureau of Geology and Mineral Resources, Jiuquan 735000, Gansu, China | |
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| 基金项目:本文得到中国地质调查局项目“祁连成矿带肃南—大柴旦地区地质矿产调查（编号：DD20160012）”资助 |
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| 中文摘要:寒山金矿床位于北祁连造山带西段与阿尔金断裂的交汇部位，是奥陶系阴沟群火山-沉积岩系中断裂破碎蚀变带控制的金矿床。前人对寒山金矿床的地质特征、成矿时代、矿床地球化学及成因等进行了研究和探讨，取得了不少研究成果，结合前人研究，本次工作获得黄铁绢英岩型金矿石中绢云母Ar-Ar坪年龄为（302.5±1.8）Ma，获得矿区南部闪长岩体锆石U-Pb年龄为（390.4±9.5）Ma，并对成矿时代和岩体与成矿关系进行了探讨，认为主成矿阶段为华力西期，进一步确定矿区闪长岩体与金成矿有关。成矿作用与EW向次级小构造关系密切。 |
| 中文关键词:地球化学 蚀变岩年龄 侵入岩年龄 成矿时代 寒山金矿床 北祁连山西段 |
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| A study of ore-forming epoch of Hanshan deposit in western North Qilian Mountain |
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| Abstract:Located at the intersection of western North Qilian orogenic belt and Altun fault belt, the Hanshan gold deposit is controlled by broken alteration zone in the volcanic-sedimentary rock of the Ordovician Yingou Group. Previous researchers have made researches and investigation into this ore deposit in such aspects as geological characteristics, ore-forming epoch, geochemistry and genesis, and obtained lots of achievements. In combination with previous research results,the authors detected that the Ar-Ar plateau age of the sericite in beresite is (302.5±1.8)Ma, and the zircon LA-ICP MS dating result of the diorite in southern part is(390.4±9.5)Ma. On such a basis, the authors discussed the ore-forming epoch and the relationship between the rock mass and mineralization. It is held that the ore-forming process took place in Hercynian period, diorite was closely related to gold mineralization, and mineralization was related to EW-trending secondary structures. |
| keywords:geochemistry age of altered rock age of intrusive rocks ore-forming period Hanshan gold deposit North Qilian Mountain |
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