| 北祁连山西段寒山金矿床成矿时代探讨 |
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| 引用本文： | 刘永彪,余君鹏,孔维琼,樊新祥,赵吉昌,李省晔,王鹏.北祁连山西段寒山金矿床成矿时代探讨[J].矿床地质,2020,39(1):135-146. |
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| 作者姓名： | 刘永彪 余君鹏 孔维琼 樊新祥 赵吉昌 李省晔 王鹏 |
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| 作者单位： | 甘肃省地质矿产勘查开发局第四地质矿产勘查院,甘肃酒泉 735000;甘肃省地质矿产勘查开发局第四地质矿产勘查院,甘肃酒泉 735000;甘肃省地质调查院,甘肃兰州 730000;甘肃省地质矿产勘查开发局第四地质矿产勘查院,甘肃酒泉 735000;兰州新区自然资源局,甘肃兰州 730000;兰州新区自然资源局,甘肃兰州 730000 |
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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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| 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。
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| 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 |
| 收稿时间： | 2018/10/30 0:00:00 |
| 修稿时间： | 2019/6/24 0:00:00 |
A study of ore-forming epoch of Hanshan deposit in western North Qilian Mountain |
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| LIU YongBiao,YU JunPeng,KONG WeiQiong,FAN XinXiang,ZHAO JiChang,LI ShengYe and WANG Peng.A study of ore-forming epoch of Hanshan deposit in western North Qilian Mountain[J].Mineral Deposits,2020,39(1):135-146. |
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| Authors: | LIU YongBiao YU JunPeng KONG WeiQiong FAN XinXiang ZHAO JiChang LI ShengYe and WANG Peng |
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| Institution: | Fourth Institute of Geological and Mineral Exploration of Gansu Bureau of Geology and Mineral Resources, Jiuquan 735000, Gansu, China,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,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,Fourth Institute of Geological and Mineral Exploration of Gansu Bureau of Geology and Mineral Resources, Jiuquan 735000, Gansu, China,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 and Fourth Institute of Geological and Mineral Exploration of Gansu Bureau of Geology and Mineral Resources, Jiuquan 735000, Gansu, China |
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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. |
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| Keywords: | geochemistry age of altered rock age of intrusive rocks ore-forming period Hanshan gold deposit North Qilian Mountain |
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