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| 大别山北麓河南新县地区大银尖钼矿床辉钼矿Re-Os同位素年龄及其意义 | |
| 引用本文： | 罗正传,李永峰,王义天,王小高.大别山北麓河南新县地区大银尖钼矿床辉钼矿Re-Os同位素年龄及其意义[J].地质通报,2010,29(9):1349-1354. |
| 作者姓名： | 罗正传 李永峰 王义天 王小高 |
| 作者单位： | 1. 河南省有色金属地质勘查总院,河南,郑州,450052;河南省有色金属矿产探测工程技术研究中心,河南,郑州,450016 2. 中国地质科学院矿产资源研究所,北京,100037 3. 河南省有色金属地质勘查总院,河南,郑州,450052 |
| 基金项目： | 河南省国土资源厅地质矿产科技攻关项目，国家自然科学基金项目 |
| 摘 要： | 位于大别山北麓的大银尖钼矿床是一个斑岩-矽卡岩-脉型"三位一体"的复合型矿床,利用电感耦合等离子体质谱仪对大银尖钼矿床的4件辉钼矿样品进行了Re-Os同位素年龄测定,获得Re-Os等时线年龄122.4Ma±7.2Ma,准确厘定其成矿时代为早白垩世。辉钼矿的Re同位素含量特征表明,大银尖钼矿床的成矿物质可能主要来源于下地壳。大银尖钼矿床是中国中东部伸展构造体制下岩石圈减薄的产物,属于中国东部中生代大规模金属成矿作用的一部分。 |
| 关 键 词： | 辉钼矿 Re-Os等时线年龄 大银尖钼矿床 大别山 |
The molybdenite Re-Os age of Dayinjian molybdenum deposit in the northern margin of the Dabie Mountain, Xinxian area, Henan, China and its significance |
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| LUO Zheng-zhuan,LI Yong-feng,WANG Yi-tian,WANG Xiao-gao.The molybdenite Re-Os age of Dayinjian molybdenum deposit in the northern margin of the Dabie Mountain, Xinxian area, Henan, China and its significance[J].Geologcal Bulletin OF China,2010,29(9):1349-1354. | |
| Authors: | LUO Zheng-zhuan LI Yong-feng WANG Yi-tian WANG Xiao-gao |
| Institution: | 1. Henan Institute of Geological Exploration for Non-ferrous Metal, Zhengzhou 450052, Henan, China;2. Non-Ferrous Mineral Exploration Engineering Research Center of Henan Province, Zhengzhou 450016, Henan, China;3. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China |
| Abstract: | The Dayinjian molybdenum deposit, located in north margin of the Dabie Mountain, is a porphyry-skarn-vein type deposit. In this paper, four molybdenite samples selected from this deposit have been used for Re-Os dating by the inductively coupled plasma mass spectrometry (ICP-MS), and the dating yielded of a Re-Os isochron age of 122.4±7.2 Ma, indicating the molybdenum mineralization occurred in Early Cretaceous. Moreover, the Re isotopic contents of molybdenite samples indicate that the ore-forming materials are likely to be mainly derived from the lower crust. The Dayinjian molybdenum deposit is developed in the regional extensional regime while the lithosphere thinning occurred in Mesozoic in the central-eastern China, which is a component part of the large-scale metal mineralization in the eastern China. |
| Keywords: | molybdenite Re-Os isochron age Dayinjian molybdenum deposit Dabie Mountain |
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