| 豫西熊耳山矿集区栾灵金矿床辉钼矿Re-Os同位素年龄及其地质意义 |
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| 引用本文： | 抄尉尉,叶会寿,田野,刘彦伟,路东宇,王鹏,简伟,张兴康.豫西熊耳山矿集区栾灵金矿床辉钼矿Re-Os同位素年龄及其地质意义[J].矿床地质,2016,35(1):103-116. |
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| 作者姓名： | 抄尉尉 叶会寿 田野 刘彦伟 路东宇 王鹏 简伟 张兴康 |
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| 作者单位： | 1. 中国地质大学地球科学与资源学院,北京,100083;2. 中国地质科学院矿产资源研究所国土资源部成矿作用与资源评价重点实验室,北京,100037;3. 栾川县栾灵金矿有限公司,河南栾川,471500 |
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| 基金项目： | 本文得到国家自然科学基金项目(编号:41272104、41573036)和地质调查项目(编号:12120114035401、1212011220869)联合资助 |
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| 摘 要： | 豫西栾灵金矿床地处熊耳山金多金属矿集区南部马超营断裂带北侧,金矿体产于构造破碎带中,呈钾长石石英脉体和蚀变岩产出,为本区一种新的金矿化类型。文章为厘定栾灵金矿床的成矿时代,采用辉钼矿Re-Os同位素定年方法,测得栾灵金矿6件辉钼矿样品的Re-Os同位素模式年龄为(161±3)Ma~(164±2)Ma,加权平均年龄(163±1)Ma(MSWD=0.68),等时线年龄(163±2)Ma(MSWD=1.5),表明栾灵金矿床形成于晚侏罗世早期。与祁雨沟、前河金矿等早白垩世(125 Ma)金矿相比,栾灵金矿的成矿作用早约38 Ma。这些年龄数据表明,该矿床在区域上可能与南泥湖-三道庄、上房沟钼矿等形成于同一成矿系统,它的发现为在熊耳山地区寻找相似成矿地质条件的金、钼矿床提供了依据。
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| 关 键 词： | 地球化学 矿床特征 辉钼矿 Re-Os同位素年龄 栾灵金矿床 豫西 |
| 收稿时间： | 2015/6/14 0:00:00 |
| 修稿时间： | 2015/11/26 0:00:00 |
Re-Os isotopic dating of molybdenite from Luanling gold deposit in Xiong'er Mo untain ore concentration area of western Henan Province and its geological sig nificance |
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| CHAO WeiWei,YE HuiShou,TIAN Ye,LIU YanMing,LU DongYu,WA NG Peng,JIAN Wei and ZHANG XingKang.Re-Os isotopic dating of molybdenite from Luanling gold deposit in Xiong'er Mo untain ore concentration area of western Henan Province and its geological sig nificance[J].Mineral Deposits,2016,35(1):103-116. |
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| Authors: | CHAO WeiWei YE HuiShou TIAN Ye LIU YanMing LU DongYu WA NG Peng JIAN Wei and ZHANG XingKang |
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| Institution: | School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China,MRL Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China,Luanling Gold Deposit Corpora-tion of Luanchuan County, Luanchuan 471500, Henan, China,Luanling Gold Deposit Corpora-tion of Luanchuan County, Luanchuan 471500, Henan, China,School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China,School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China,MRL Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China and School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China |
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| Abstract: | The Luanling gold deposit is located on the northern side of Machaoying fault zone in the southern part of the Xiong''er Mountain gold polymetallic ore district,Henan Province. The gold orebodies mainly occur as the K-feldspar-quartz vein or altered rock in the structural fracture zone. For the purpose of studying the chronology of the gold mineralization in the Luanling gold deposit,the authors purified molybdenite from the gold-bearing feldspar quartz veins in the Luanling gold deposit. Re-Os dating of these minerals yielded modal ages from(161±3) Ma to(164±2) Ma, a weighted average age of(163±1) Ma(MSWD=0.68), and an isochron age of(163±2) Ma(MSWD=1.5), implying that the Luanling gold deposit formed in the Late-Jurassic. Compared with the Cretaceous(125 Ma) Qiyugou gold deposit and Qianhe gold deposit, the Luanling gold deposit formed about 38 Ma earlier, indicating a new late Jurassic mineralization period in the Xiong''er ore concentration area. The Luanling gold deposit and Nannihu-Sandaozhuang as well as Shangfanggou Mo deposits were produced by the same mineralization system. The discovery of the Luanling Au deposit provides the basis for the study of Au-Mo deposits of the similar ore-forming conditions in the Xiong''er Mountain region. |
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| Keywords: | geochemistry deposit characteristics molybdenite Re-Os isotopic age Luanling gold deposit western Henan |
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