| 青海祁漫塔格地区野马泉花岗闪长岩LA-ICP-MS锆石U-Pb年龄及其地质意义 |
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| 引用本文： | 宋忠宝,张雨莲,贾群子,陈向阳,江磊,何书跃,李金超,杨涛,全守村,张晓飞,栗亚芝,唐卓. 青海祁漫塔格地区野马泉花岗闪长岩LA-ICP-MS锆石U-Pb年龄及其地质意义[J]. 地质通报, 2016, 35(12): 2006-2013 |
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| 作者姓名： | 宋忠宝 张雨莲 贾群子 陈向阳 江磊 何书跃 李金超 杨涛 全守村 张晓飞 栗亚芝 唐卓 |
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| 作者单位： | 1. 中国地质调查局西安地质调查中心, 陕西西安 710054;2. 青海省第三地质矿产勘查院, 青海西宁 810012;3. 天津市地质矿产测试中心, 天津 300191 |
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| 基金项目： | 中国地质调查局项目（编号：1212010918044、1212011121089） |
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| 摘 要： | 青海东昆仑复合造山带西段的祁漫塔格地区是一个特征显著的侵入岩浆构造带,同时也是重要的多金属成矿带。野马泉铁铜多金属矿是该区较为典型的接触交代矽卡岩型矿床。利用LA-ICP-MS锆石U-Pb定年方法,获得该矿区与野马泉铁铜矿床有关的花岗闪长岩体的成岩年龄为226±2Ma;该结果与前人利用辉钼矿Re-Os法获得的矽卡岩型铜钼多金属矿石和矽卡岩型钼矿石的等时线年龄一致,因此本文厘定野马泉矿区成岩成矿时代为中—晚三叠世。
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| 关 键 词： | 矽卡岩型 铁铜矿床 中-晚三叠世 LA-ICP-MS锆石U-Pb年龄 花岗闪长岩 野马泉 祁漫塔格 |
| 收稿时间： | 2016-01-12 |
| 修稿时间： | 2016-05-02 |
LA-ICPMS zircon U-Pb age of the Yemaquan granodiorite in the Qimantag area, Qinghai Province and its geological implications |
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| SONG Zhongbao,ZHANG Yulian,JIA Qunzi,CHEN Xiangyang,JIANG Lei,HE Shuyue,LI Jinchao,YANG Tao,QUAN Shoucun,ZHANG Xiaofei,LI Yazhi and TANG Zhuo. LA-ICPMS zircon U-Pb age of the Yemaquan granodiorite in the Qimantag area, Qinghai Province and its geological implications[J]. Geologcal Bulletin of China, 2016, 35(12): 2006-2013 |
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| Authors: | SONG Zhongbao ZHANG Yulian JIA Qunzi CHEN Xiangyang JIANG Lei HE Shuyue LI Jinchao YANG Tao QUAN Shoucun ZHANG Xiaofei LI Yazhi TANG Zhuo |
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| Affiliation: | 1. Xi''an Center of Geological Survey, China Gelolgical Survey, Xi''an 710054, Shaanxi, China;2. Qinghai No.3 Institute of Geology and Mineral Resources Exploration, Xining 810012, Qinghai, China;3. Tianjin Geological Mineral Testing Center, Tianjin 300191, China |
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| Abstract: | Qimantag area in the western part of the East Kunlun orogenic belt is a characteristic intrusive magmatic structural belt, and is also an important polymetallic metallogenic belt. The Yemaquan Fe-Cu polymetallic ore district is a typical contact metasomatism skarn deposit. In this study, the authors obtained the petrogenetic age of the granodiorite (226±2Ma) by using LA-ICP-MS zircon U-Pb dating. The result is in agreement with previous isochron age of 225.0±4.0Ma for skarn copper molybdenum polymetallic ore and 230.1±4.7Ma for skarn type molybdenum ore obtained by molybdenite Re-Os method. It is thus held that the petrogenetic and ore-forming epoch is Middle-Late Triassic. |
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| Keywords: | skarn-type Fe-Cu deposit Middle-Late Triassic LA-ICP-MS zircon U-Pb ages granodiorite Yemaquan Qimantag |
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