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| 江西广昌新安钼矿床地质特征及其铼-锇同位素测年 | |
| 引用本文： | 曾载淋,刘善宝,邓茂春,黄凡,陈毓川,赖志坚,屈文俊.江西广昌新安钼矿床地质特征及其铼-锇同位素测年[J].岩矿测试,2011,30(2):144-149. |
| 作者姓名： | 曾载淋 刘善宝 邓茂春 黄凡 陈毓川 赖志坚 屈文俊 |
| 作者单位： | 1. 中国地质科学院,北京,100037;江西地勘局赣南地质调查大队,江西,赣州,341000 2. 中国地质科学院矿产资源研究所,北京,100037 3. 中国地质科学院,北京,100037 4. 江西地勘局赣南地质调查大队,江西,赣州,341000 5. 国家地质实验测试中心,北京,100037 |
| 基金项目： | 国家深部探测专项资助，中国地质科学院矿产资源研究所基本业务费专项基金资助，"我国重要矿产和区域成矿规律研究"项目资助 |
| 摘 要： | 广昌新安钼矿是武夷山西坡中段新发现的斑岩型钼矿床。文章概要地介绍了该矿床的地质特征,并利用Re-Os同位素定年方法对新安钼矿体中的辉钼矿进行了成矿年代的测定,获得辉钼矿同位素的模式年龄为(166.7±2.3)Ma～(169.5±2.4)Ma,计算出等时线年龄为(168.3±1.7)Ma,表明其钼矿成矿作用发生于燕山早期,属于华南中生代大规模成矿作用第一阶段的产物。矿床成矿时代的精确厘定,说明该区在燕山期大规模钨锡成矿作用之前(165～150 Ma),可能存在一期独立的钼成矿作用。区域钼矿床年龄数据统计表明,本区至少存在三期独立的钼成矿作用,分别集中在130～140 Ma、150～160 Ma和165～170 Ma,意味着本区钼成矿作用经历了漫长的演化过程,这对区域岩浆岩活动及其成矿作用研究和找矿工作具有指导意义。 |
| 关 键 词： | Re-Os年龄 矿床地质特征 新安钼矿 |
| 收稿时间： | 2010/5/11 0:00:00 |
| 修稿时间： | 2010/10/6 0:00:00 |
Geological Characteristics and Re-Os Dating of the Xin'an Molybdenum Deposit in Jiangxi Province |
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| ZENG Zai-lin,LIU Shan-bao,DENG Mao-chun,HUANG Fan,CHEN Yu-Chuan,LAI Zhi-jian and QU Wen-jun.Geological Characteristics and Re-Os Dating of the Xin''an Molybdenum Deposit in Jiangxi Province[J].Rock and Mineral Analysis,2011,30(2):144-149. | |
| Authors: | ZENG Zai-lin LIU Shan-bao DENG Mao-chun HUANG Fan CHEN Yu-Chuan LAI Zhi-jian and QU Wen-jun |
| Institution: | ZENG Zai-lin1,2,LIU Shan-bao3,DENG Mao-chun2,HUANG Fan1,CHEN Yu-Chuan1,LAI Zhi-jian2,QU Wen-jun4(1.Graduate School,Chinese Academy of Geological Sciences,Beijing 100037,China,2.Southern Jiangxi Geological Survey Party of JBEDGMR,Ganzhou 341000,3.Institute of Mineral Resources,4.National Research Center for Geoanalysis,China) |
| Abstract: | The Xin'an molybdenum deposit, located in the middle of Wuyi Mountain's western slope, is a newly discovered porphyry Mo deposit. The geological characteristics of the deposit is presented in this paper. The Re-Os model ages of the molybdenites are between (166.7±2.3) Ma and (169.5±2.4) Ma, with a calculated isochronic age of (168.3±1.7) Ma indicating that molybdenum mineralization occurred in the early Yanshanian period, belonging to the Mesozoic first large-scale mineralization. The age of this deposit indicates that a dependent Mo mineralization may have existed in this area before large-scale tungsten/tin mineralization. According to collected molybdenite Re-Os dating results, molybdenum mineralization times are mainly concentrated in Yanshanian which includes three stages of 130-140 Ma, 150-160 Ma and 165-170 Ma, meaning molybdenum mineralization is a long-term evolutionary process. This result is not only important for studying the regional magmatic activity and mineralization, but it can also guide further exploration work. |
| Keywords: | Re-Os isochronal ages deposit geological characteristics Xin'an molybdenum deposit |
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