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| 赣南印支期清溪岩体的锆石U-Pb年代学研究及其含矿性评价 | |
| 引用本文： | 于扬,陈振宇,陈郑辉,侯可军,赵正,许建祥,张家菁,曾载淋.赣南印支期清溪岩体的锆石U-Pb年代学研究及其含矿性评价[J].大地构造与成矿学,2012,36(3):413-421. |
| 作者姓名： | 于扬 陈振宇 陈郑辉 侯可军 赵正 许建祥 张家菁 曾载淋 |
| 作者单位： | 1. 国土资源部成矿作用与资源评价重点实验室,中国地质科学院矿产资源研究所,北京100037 2. 江西省国土资源厅,江西南昌,330000 3. 江西省赣南地质调查大队,江西赣州,341000 |
| 基金项目： | 中国地质调查工作项目“我国三稀金属资源战略调查”，中国地质大调查项目“南岭地区岩浆岩成矿专属性研究”，“我国重要矿产和区域成矿规律研究”，国家深部探测技术与实验研究专项“南岭成矿带地壳岩浆系统结构探测实验”课题，“南岭于都-赣县矿集区立体探测技术与深部成矿预测示范”课题 |
| 摘 要： | 清溪岩体是赣南地区缺少精确年龄数据的含稀土岩体之一。对赣南清溪岩体中的锆石样品进行了U-Pb法年代学研究,测年结果显示该岩体主体年龄为229.3±0.8Ma和227.0±1.0Ma,属于印支期产物,并不是前人认为的属于加里东期。对清溪岩体进行了岩石学、地球化学的研究,简要论述了其含矿性,认为清溪岩体主体为黑云母花岗岩,为过铝质钾玄岩系,轻稀土和重稀土中等分馏,负Eu异常不明显。岩石化学资料数据显示,该岩体稀土总量较高,具备成矿母岩的基本条件。 |
| 关 键 词： | 赣南 印支期 清溪岩体 锆石U-Pb年龄 稀土 |
Zircon U-Pb Dating and Mineralization Prospective of the Triassic Qingxi Pluton in Southern Jiangxi Province |
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| YU Yang , CHEN Zhenyu , CHEN Zhenghui , HOU Kejun , ZHAO Zheng , XU Jianxiang , ZHANG Jiajing , ZENG Zailin.Zircon U-Pb Dating and Mineralization Prospective of the Triassic Qingxi Pluton in Southern Jiangxi Province[J].Geotectonica et Metallogenia,2012,36(3):413-421. | |
| Authors: | YU Yang CHEN Zhenyu CHEN Zhenghui HOU Kejun ZHAO Zheng XU Jianxiang ZHANG Jiajing ZENG Zailin |
| Institution: | 1.MLR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China;2.Department of Land Resources of Jiangxi Province,Nanchang 330000,Jiangxi,China;3.Geological Survey Team of Gannan,Ganzhou 341000,Jiangxi,China) |
| Abstract: | The Qingxi pluton is a rare earth element mineralized granite located in southern Jiangxi province.Zircons from the Qingxi granite were analyzed using MC-ICP-MS method,which yield U-Pb ages of 229.3±0.8 Ma and 227.0±1.0 Ma,respectively.The new ages confirm that the granite was intruded in Indosinian.The Qingxi pluton consists mainly of biotite granite,which is of peraluminous shoshonitic and characterized by mildly fractionated REE without obvious Eu anomalies.∑REE of this pluton is rather high(269×10-6~298×10-6),which is one of the prerequisites for REE mineralization in the weathering crust. |
| Keywords: | southern Jiangxi Triassic Qingxi pluton zircon U-Pb age rare earth elements |
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