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| 内蒙古黄岗夕卡岩型锡铁矿床辉钼矿Re-Os年龄及其地质意义 | |
| 引用本文： | 周振华,吕林素,冯佳睿,李超,李涛.内蒙古黄岗夕卡岩型锡铁矿床辉钼矿Re-Os年龄及其地质意义[J].岩石学报,2010,26(3):667-679. |
| 作者姓名： | 周振华 吕林素 冯佳睿 李超 李涛 |
| 作者单位： | 1. 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 2. 中国地质博物馆,北京,100034 3. 国家地质实验测试中心,北京,100037 4. 内蒙古黄岗矿业有限责任公司,克什克滕旗,016100 |
| 基金项目： | 中央级公益性科研院所基本科研业务费项目(K0921)、内蒙古重要矿产资源潜力评价及区域成矿规律研究项目(2006-02-YS01)和中国地质大学(北京)2008年度优秀博士论文扶持奖励基金项目的联合资助 |
| 摘 要： | 内蒙古黄岗大型夕卡岩型锡铁矿床位于大兴安岭南段黄岗梁-乌兰浩特锡铅锌铜多金属成矿带。本文利用辉钼矿Re-Os同位素定年方法对黄岗夕卡岩型矿体中5件辉钼矿样品进行了成矿年代测定,获得辉钼矿Re-Os模式年龄为134.6±2.0～136.5±1.9Ma,加权平均年龄为135.31±0.85Ma。辉钼矿Re含量高,显示有地幔物质体参与了成矿过程。大兴安岭地区成矿作用以中生代燕山期成矿为主,存在140～130Ma左右、180～160Ma左右的两次成矿爆发期,其中140～130Ma左右主要出现在岩石圈伸展减薄背景下,与燕山晚期侵入的小岩体有关的锡铅锌铜银多金属矿床;180～160Ma左右主要出现与燕山早期西伯利亚与华北板块后碰撞造山有关的钼铅锌铜金多金属矿床。黄岗锡铁矿床是在古太平洋板块俯冲大陆边缘弧后伸展环境下,发生的大规模成矿作用的产物。 |
| 关 键 词： | Re-Os同位素 岩石圈减薄 黄岗锡铁矿床 内蒙古 |
| 收稿时间： | 2009/11/15 0:00:00 |
| 修稿时间： | 2/1/2010 12:00:00 AM |
Molybdenite Re-Os ages of Huanggang skarn Sn-Fe deposit and their geological significance, Inner Mongolia |
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| ZHOU ZhenHua,L LinSu,FENG JiaRui,LI Chao,LI Tao.Molybdenite Re-Os ages of Huanggang skarn Sn-Fe deposit and their geological significance, Inner Mongolia[J].Acta Petrologica Sinica,2010,26(3):667-679. | |
| Authors: | ZHOU ZhenHua L LinSu FENG JiaRui LI Chao LI Tao |
| Institution: | MLR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;The Geological Museum of China, Beijing 100034, China;MLR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;National Research Center of Geoanalysis, Beijing 100037, China;Huanggang Mining Co., Ltd., Inner Mongolia, keshikhteng County 016100, China |
| Abstract: | Huanggang large tin-iron skarn deposit, Inner Mongolia, is located in the Huanggangliang-Ulanhot tin-lead-zinc-copper polymetallic belt, South Daxinganling. In this paper, five molybdenite samples separated from the Huanggang skarn ore bodies are used for Re-Os dating and obtained the model ages ranging from 134.6±2.0 to 136.5±1.9Ma, averaging 135.31±0.85Ma. High Re content of molybdenite indicates that mantle fluid is involved in mineralization process. The mineralization of the Da Hinggan Mts area is mainly in Mesozoic Yanshanian, there are two ore-forming eruptive periods, i.e., ca.140~130Ma and 180~160Ma, while the tin-lead-zinc-copper-silver polymetallic deposits related with the small intrusion in Yanshanian under lithospheric extensional and thinning environment mainly occurred in ca.140~130Ma; the molybdenum-lead-zinc-copper-aurum polymetallic deposits related with the post-collision orogeny of Siberia plate and North China plate in Early Yanshanian mainly occurred in ca.180~160Ma. Huanggang tin-iron deposit is the product of large-scale mineralization under the paleo-Pacific plate subduction environment. |
| Keywords: | Re-Os isotopic dating Lithosphere thinning Huanggang tin-iron deposit Inner Mongolia |
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