| 长江中下游九瑞矿集区宝山铜多金属矿床辉钼矿Re-Os年龄及其地质意义 |
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| 引用本文： | 胡正华,王先广 李永明 刘善宝 张家菁 陈毓川 曾庆权 王艺云 蒋金明 聂龙敏 雷天浩 胡文洁 张芳荣 吴施金 沙 珉 龚良信 谢瑞丰 文亮先.长江中下游九瑞矿集区宝山铜多金属矿床辉钼矿Re-Os年龄及其地质意义[J].中国地质,2015(2):585-596. |
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| 作者姓名： | 胡正华 王先广 李永明 刘善宝 张家菁 陈毓川 曾庆权 王艺云 蒋金明 聂龙敏 雷天浩 胡文洁 张芳荣 吴施金 沙 珉 龚良信 谢瑞丰 文亮先 |
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| 作者单位： | 1.成都理工大学, 四川 成都 610059; 2.江西省地质调查研究院, 江西 南昌 330000; 3.江西省国土资源厅, 江西 南昌 330025; 4.中国地质科学院矿产资源研究所, 北京 100037; 5.江西省国土资源厅执法监察总队, 江西 南昌 330025 |
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| 基金项目： | 江西省地质勘查基金(20090208-2)、中央地勘基金(2013360010)、国土资源部公益性行业专项(201411035)、江西省地质勘查基金(矿[2012]01-06)联合资助。 |
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| 摘 要： | 九瑞地区斑岩-矽卡岩型矿床是长江中下游地区Cu-Au-Mo(Fe)多金属成矿带的重要组成部分,宝山铜多金属矿床是江西省实施找矿突破战略以来,在九瑞矿集区界首—大桥背斜核部新发现的首个中型以上斑岩-矽卡岩型铜多金属矿床。本文利用辉钼矿Re-Os同位素定年方法对宝山矿床进行了成矿时代的研究,获得了6件辉钼矿Re-Os同位素模式年龄为(147.2±3.6)Ma~(150.5±2.7)Ma,加权平均年龄为(148±1)Ma,MSWD=1.03。6件样品其等时线年龄为(148.6±2.6)Ma,MSWD=1.9,代表了宝山矿床的成矿时代,与九瑞矿集区其他斑岩-矽卡岩型铜多金属矿床(武山、城门山、湖北丰山洞、鸡笼山、宋家冲、邓家山、通江岭)以及长江中下游地区鄂东南、铜陵矿集区斑岩-矽卡岩铜多金属矿床的形成时代高度一致,它们均为中国东部EW特堤斯构造域向NE古太平洋构造域大转折背景下,软流圈上涌和玄武质岩浆底侵而导致壳幔同熔所引起的燕山期花岗质岩浆岩活动的产物。
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| 关 键 词： | 辉钼矿 Re-Os同位素 成矿年龄 宝山 九瑞矿集区 |
Re-Os age of molybdenite from the Baoshan copper polymetallic deposit in the Jiurui ore concentration area along the middle-lower Yangtze River region and its geological significance |
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| HU Zheng-hu,WANG Xian-guang,LI Yong-ming,LIU Shan-bao,ZHANG Jia-jing,CHEN Yu-chuan,ZENG Qing-quan,WANG Yi-yun,JIANG Jin-ming,NIE Long-min,LEI Tian-hao,HU Wen-jie,ZHANG Fang-rong,WU Shi-jin,SHA Min,GONG Liang-xin,XIE Rui-feng,WEN Liang-xian.Re-Os age of molybdenite from the Baoshan copper polymetallic deposit in the Jiurui ore concentration area along the middle-lower Yangtze River region and its geological significance[J].Chinese Geology,2015(2):585-596. |
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| Authors: | HU Zheng-hu WANG Xian-guang LI Yong-ming LIU Shan-bao ZHANG Jia-jing CHEN Yu-chuan ZENG Qing-quan WANG Yi-yun JIANG Jin-ming NIE Long-min LEI Tian-hao HU Wen-jie ZHANG Fang-rong WU Shi-jin SHA Min GONG Liang-xin XIE Rui-feng WEN Liang-xian |
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| Institution: | 1. Chengdu University of Technology, Chengdu 610059, Sichuan, China;2. Jiangxi Institute of Geological Survey, Nanchang 330000, Jiangxi, China; 3. Department of Land and Resources of Jiangxi Province, Nanchang 330025, Jiangxi, China; 4. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China; 5. Law Enforcement and Supervision Office of Department of Land and Resources of Jiangxi Province, Nanchang 330025, Jiangxi, China |
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| Abstract: | Abstract: Porphyry-skarn deposits in Jiurui area constitute an important part of the middle-lower Yangtze River Cu-Au-Mo (Fe) polymetallic ore belt. Since the implementation of the prospecting breakthrough strategy, the Baoshan deposit has been the first medium-size porphyry-skarn copper polymetallic deposit discovered at the core of Jieshou-Daqiao anticline in Jiurui area. In this paper, molybdenite Re-Os dating was used to study the mineralization time of the Baoshan deposit and, as a result, six molybdenite Re-Os model ages of 147.2±3.6 Ma to 150.5±2.7 Ma and weighted average age of 148±1 Ma (MSWD=1.03) were obtained. These six molybdenite Re-Os model ages yielded an isochron age of 148.6±2.6 Ma (MSWD=1.9), which represents the ore-forming age of the Banshan deposit. The ore-forming age of the Baoshan deposit is similar to ages of other porphyry-skarn type copper polymetallic deposits in Jiurui area (e.g., Wushan, Chengmenshan, Fengshandong of Hubei, Jilongshan, Songjiachong, Dengjiashan and Tongjiangling), as well as in Tongling and southeastern Hubei areas within the middle-lower Yangtze River region. All of them are products of granitic magma activities related to the crust-mantle syntexis resulting from the upwelling asthenosphere and the underplating basaltic magma in the Yanshanian period. |
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| Keywords: | molybdenite Re-Os isotope ore-froming age Baoshan Jiurui area |
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