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| 赣南崇义地区茅坪钨锡矿床铼-锇同位素定年及其地质意义 | |
| 引用本文： | 曾载淋,张永忠,朱祥培,陈郑辉,王成辉,屈文俊.赣南崇义地区茅坪钨锡矿床铼-锇同位素定年及其地质意义[J].岩矿测试,2009,28(3):209-214. |
| 作者姓名： | 曾载淋 张永忠 朱祥培 陈郑辉 王成辉 屈文俊 |
| 作者单位： | 1. 中国地质科学院,北京,1130037;江西省地质矿产勘查开发局赣南地质调查大队,江西,赣州,341000 2. 江西省地质矿产勘查开发局赣南地质调查大队,江西,赣州,341000 3. 中国地质科学院矿产资源研究所,北京,100037;中国地质大学(北京)北京,100083 4. 中国地质科学院,北京,1130037 5. 国家地质实验测试中心,北京,100037 |
| 基金项目： | 国家科技支撑计划，国土资源地质大调查项目，江西省地勘局科研项目 |
| 摘 要： | 茅坪钨锡矿床位于南岭成矿带东段,位于崇(义)—(大)余—(上)犹钨多金属矿矿集区西华山—杨眉寺区段中北部的天门山—红桃岭矿田,为天门山岩体向北倾伏延伸的前锋部位;矿区钨锡矿化类型主要有云英岩型和石英脉型两种。文章选取云英岩型矿体及上部石英脉型钨矿体中与黑钨矿共生的辉钼矿7件,进行Re-Os等时线年龄测定,得到其模式年龄为(141.4±2.2)Ma～(158.2±2.2)Ma,其中云英型钨锡矿体中辉钼矿等时线年龄为(156.8±3.9)Ma,成矿时代为中侏罗世,对应于燕山早期第二阶段;从云英岩矿体中样品模式年龄为(150.7±2.4)Ma～(158.2±2.2)Ma,石英脉型矿体中样品模式年龄为(141.4±2.2)Ma～(151.0±2.4)Ma。分析石英脉型矿体紧随但略晚于云英岩型钨锡矿体成矿,并结合矿田内取得的同位素年龄数据,探讨了矿田成岩成矿时代及时差,推断天门山岩体可能为多次成岩成矿的复杂式岩体,其成矿时代跨度为133～156Ma。 |
| 关 键 词： | 茅坪钨锡矿床 辉钼矿 铼-锇同位素定年 成矿时代 |
| 收稿时间： | 2009/2/10 0:00:00 |
| 修稿时间： | 2009/3/16 0:00:00 |
Re-Os Isotopic Dating of Molybdenite from the Maoping Tungsten-Tin Deposit in Chongyi County of Southern Jiangxi Province and Its Geological Significance |
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| ZENG Zai-lin,ZHANG Yong-zhong,ZHU Xiang-pei,CHEN Zheng-hui,WANG Cheng-hui,QU Wen-jun.Re-Os Isotopic Dating of Molybdenite from the Maoping Tungsten-Tin Deposit in Chongyi County of Southern Jiangxi Province and Its Geological Significance[J].Rock and Mineral Analysis,2009,28(3):209-214. | |
| Authors: | ZENG Zai-lin ZHANG Yong-zhong ZHU Xiang-pei CHEN Zheng-hui WANG Cheng-hui QU Wen-jun |
| Institution: | Chinese Academy of Geological Sciences, Southern Jiangxi Geological Survey Party of JBEDGMR;Southern Jiangxi Geological Survey Party of JBEDGMR;Southern Jiangxi Geological Survey Party of JBEDGMR;Institute of Mineral Resources Chinese Academy of Geological Sciences, China University of Geosciences (Beijing);Institute of Mineral Resources Chinese Academy of Geological Sciences;National Research Center for Geoanalysis |
| Abstract: | The Maoping tungsten-tin deposit is located in the eastern section of Nanling metallogenic belt,the Chongyi-Dayu-Shangyou tungsten polymetallic ore concentration area and at the front part of the Tianmenshan rock mass extension with a north trend. Greisen and the quartz vein are the main tungsten-tin mineralization types in the mine area. Seven molybdenite samples from greisen ore body and quartz vein tungsten ore body associated with black tungsten ore were chosen for Re-Os isotopic dating and model age of （141.4±2.2） Ma158.2±2.2 Ma were obtained. The isochrone age of molybdenites from greisen type tungsten-tin ore body is （156.8±3.9） Ma,which indicates that its mineralogenetic epoch is at the Middle Jurassic,corresponds to the second stage of early Yanshanian period. And the model age for the samples from greisen ore body and from quartz vein ore body are （150.7±2.4） Ma～（158.2±2.2） Ma and （141.4±2.2） Ma～（151.0±2.4） Ma respectively,which indicates that the mineralization time of the quartz vein ore body is slightly earlier than that of greisen ore body. Based on the other isotopic dating data from the mine area,the minerogenetic epoch and the time differences for different ore bodies were discussed and a conclusion that the Tianmenshan rock body is a compound complex rock body undergoing repeated ore-forming processes and with minerogenetic epoch span of 133～156 Ma was deduced. |
| Keywords: | the Maoping tungsten-tin deposit molybdenite Re-Os isotopic dating mineralization age |
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