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| 辽宁姚家沟钼矿床辉钼矿Re-Os同位素年龄测定及其地质意义 | |
| 引用本文： | 方俊钦,聂凤军,张可,刘勇,徐备.辽宁姚家沟钼矿床辉钼矿Re-Os同位素年龄测定及其地质意义[J].岩石学报,2012,28(2):372-378. |
| 作者姓名： | 方俊钦 聂凤军 张可 刘勇 徐备 |
| 作者单位： | 1. 北京大学地球与空间科学学院,造山带与地壳演化教育部重点实验室,北京100871 2. 中国地质科学院矿产资源研究所,北京,100037 3. 北京科技大学土木与环境工程学院,北京,100083 |
| 基金项目： | 本文受国家重点自然科学基金项目(41030421)和地质调查项目(1212010911029)联合资助. |
| 摘 要： | 本文对青城子矿田姚家沟钼矿床中的8件辉钼矿样品进行Re-Os同位素分析,所获辉钼矿的模式年龄值为166.1±2.3Ma~169.1±2.5Ma,等时线年龄为168.8±3.9Ma(MSWD=1.12),代表流体成矿年龄,结合姚家沟花岗岩体已有的年代学数据,我们推测姚家沟地区可能存在多期次岩浆侵入,姚家沟钼矿床与168.8±3.9Ma 的岩浆侵入活动有关。结合区域成矿地质背景,我们推断早中侏罗纪时期,姚家沟钼矿床可能受古亚洲洋闭合的影响,是华北板块与西伯利亚板块后碰撞造山阶段构造-岩浆作用及相关流体活动的产物。 |
| 关 键 词： | Re-Os同位素年龄 辉钼矿 成矿时代 姚家沟钼矿床 青城子矿田 |
| 收稿时间： | 2011/8/10 0:00:00 |
| 修稿时间： | 2012/1/10 0:00:00 |
Re-Os isotopic dating on molybdenite separates and its geological significance from the Yaojiagou molybdenum deposit, Liaoning Province |
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| FANG JunQin,NIE FengJun,ZHANG Ke,LIU Yong and XU Bei.Re-Os isotopic dating on molybdenite separates and its geological significance from the Yaojiagou molybdenum deposit, Liaoning Province[J].Acta Petrologica Sinica,2012,28(2):372-378. | |
| Authors: | FANG JunQin NIE FengJun ZHANG Ke LIU Yong and XU Bei |
| Institution: | Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871, China;Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Civil and Environmental Engineering Institute, University of Science and Technology Beijing, Beijing 100083, China;Civil and Environmental Engineering Institute, University of Science and Technology Beijing, Beijing 100083, China;Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871, China |
| Abstract: | Eight molybdenite samples were selected from the Yaojiagou molybdenum deposit. The Re-Os isotopic model ages ranging from 166.1±2.3Ma to 169.1±2.5Ma, yielded an isochron age of 168.8±3.9Ma (MSWD=1.12), which was interpreted to be the ore-forming age of the deposit. Combined with existing geochronologic data of Yaojiagou granit pluton, we assume that there were multistage of intrusions in Yaojiagou area and the Yaojiagou molybdenum deposit was related to the magma intrusion activities in 168.8±3.9Ma. In combination with metallogenic geological background, we infer that the Yaojiagou molybdenum deposit developed from Early to Middle Jurassic, influenced by magma and fluid function of post-collision between North China Craton and Siberia Craton. |
| Keywords: | Re-Os isotopic ages Molybdenite Ore-forming age Yaojiagou molybdenum deposit Qingchengzi orefield |
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