| 长江中下游成矿带九瑞矿集区含矿（Cu-Au）岩体的锆石U-Pb定年及其地质意义 |
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| 引用本文： | 陈志洪,邢光福,郭坤一,曾勇,匡福祥,贺振宇,柯学,余明刚,赵希林,张勇. 长江中下游成矿带九瑞矿集区含矿（Cu-Au）岩体的锆石U-Pb定年及其地质意义[J]. 地质学报, 2011, 85(7): 1146-1158. DOI: 11-1951/P.20110715.0857.006 |
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| 作者姓名： | 陈志洪 邢光福 郭坤一 曾勇 匡福祥 贺振宇 柯学 余明刚 赵希林 张勇 |
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| 作者单位： | 1. 中国地质调查局南京地质调查中心,南京,210016
2. 中国地质科学院地质研究所,国土资源部大陆动力学重点实验室,北京,100037 |
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| 基金项目： | 中国地质调查局地质矿产调查评价项目(编号[2010]矿评(01-16-4)、(01-16-5)和(01-16-22))资助的成果 |
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| 摘 要： | 江西九瑞（九江-瑞昌）地区是长江中下游铜-铁-金（硫）成矿带的一个重要的矿集区，位于成矿带的西段。本文选取了区内研究程度相对薄弱的丁家山、洋鸡山、宝山、铜岭和大浪等5个与Cu-Au成矿作用密切相关的花岗质岩体，首次进行了锆石LA-ICP-MS U-Pb年龄测定，并讨论了其地质意义。测年结果显示，上述岩体分别形成于145.4±1.2 Ma、144.8±1.3 Ma、143.6±1.2 Ma、141.2±1.3 Ma和146.4±1.2 Ma，为晚侏罗世-早白垩世岩浆活动的产物，同时也可以近似代表各矿床的成矿时代。结合区域地质资料，认为九瑞矿集区内这一成岩-成矿地质事件可能与古太平洋板块俯冲挤压造山作用后期整体向弧后伸展环境过渡的地球动力学机制有关。是否为区域性加厚下地壳、拆沉下地壳部分熔融或洋脊俯冲作用的产物，还有待进一步研究。
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| 关 键 词： | 含矿（Cu-Au）岩体 锆石U-Pb定年 九瑞矿集区 长江中下游成矿带 |
| 收稿时间： | 2011-01-20 |
| 修稿时间： | 2011-01-20 |
Zircon U-Pb ages of ore-bearing granitic bodies in the Jiujiang-Ruichang metallogenic district of the mineralization belt of the Middle-Lower Reaches of the Yangtze River and its geological significance |
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| chen zhihong and XING Guangfu,GUO Kunyi,ZENG Yong,KUANG Fuxiang,HE Zhenyu,KE Xue,YU Minggang,ZHAO Xilin,ZHANG Yong. Zircon U-Pb ages of ore-bearing granitic bodies in the Jiujiang-Ruichang metallogenic district of the mineralization belt of the Middle-Lower Reaches of the Yangtze River and its geological significance[J]. Acta Geologica Sinica, 2011, 85(7): 1146-1158. DOI: 11-1951/P.20110715.0857.006 |
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| Authors: | chen zhihong XING Guangfu GUO Kunyi ZENG Yong KUANG Fuxiang HE Zhenyu KE Xue YU Minggang ZHAO Xilin ZHANG Yong |
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| Affiliation: | Nanjing Center, China Geological Survey, Nanjing, 210016 |
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| Abstract: | The Jiujiang-Ruichang area is an important ore concentrated district in the western section of the Cu-Fe-Au(S) mineralization belt of the Middle-Lower Reaches of the Yangtze River.Five poorly-stuided granitic rocks at Dingjiashan,Yangjisha,Baoshan,Tongling,and Daliang,which are closely related to Cu-Au mineralization,were selected to conduct zircon LA-ICP-MS U-Pb dating and explore its geological significance.Zircon U-Pb dating results indicate that these granitic rocks formed in Late Jurassic to Early Cret... |
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| Keywords: | ore(Cu/Au)-bearing bodies zircon U-Pb age Jiujiang-Ruichang metallogenic district the mineralization belt of the Middle-Lower Reaches of the Yangtze River |
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