| 吉林省长白临江铜矿石英闪长玢岩锆石U-Pb年龄及其地质意义 |
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| 引用本文： | 杨宏智,逄伟,张朋,赵岩,张森,寇林林.吉林省长白临江铜矿石英闪长玢岩锆石U-Pb年龄及其地质意义[J].有色金属(矿山部分),2017,69(4). |
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| 作者姓名： | 杨宏智 逄伟 张朋 赵岩 张森 寇林林 |
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| 作者单位： | 中国地质调查局沈阳地质调查中心,山东省地矿工程勘察院,中国地质调查局沈阳地质调查中心,中国地质调查局沈阳地质调查中心,中国地质调查局沈阳地质调查中心,中国地质调查局沈阳地质调查中心 |
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| 基金项目： | 国家自然科学基金青年基金(41502093)和中国地质调查局资助(12120114037801)联合资助。 |
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| 摘 要： | 为深入研究吉林长白地区临江铜矿床与成矿有关的石英闪长玢岩的形成时代与意义,利用锆石LA-ICP-MS U-Pb测试方法,对石英闪长玢岩进行年龄测试。锆石定年结果显示,石英闪长玢岩获得2组年龄:第1组年龄为128.7±2.8 Ma和131.4±3.78 Ma,为捕获锆石年龄;第2组加权平均年龄为122.6±1.1 Ma(n=16,MSWD=0.80),代表石英闪长玢岩结晶年龄,属于早白垩世中期。结合前人研究,认为临江铜矿成矿构造环境有早白垩世古太平洋板块向欧亚大陆俯冲的地球动力学背景。
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| 关 键 词： | 石英闪长玢岩 锆石U-Pb年龄 成矿构造环境 临江铜矿 吉林 |
| 收稿时间： | 2017/2/10 0:00:00 |
| 修稿时间： | 2017/5/16 0:00:00 |
Zircon U-Pb Dating of Diorite-Porphyrite in the Linjiang Copper Deposit of Jilin Province and Its Geological Significance |
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| Authors: | Yang Hongzhi Pang Wei Zhang Peng Zhao Yan Zhang Sen and Kou Linlin |
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| Affiliation: | Shenyang Institute of Geology and Mineral Resources,Shenyang,Shandong Geological Engineering Investigation Institute,Jinan,Shenyang Institute of Geology and Mineral Resources,Shenyang,Shenyang Institute of Geology and Mineral Resources,Shenyang,Shenyang Institute of Geology and Mineral Resources,Shenyang,Shenyang Institute of Geology and Mineral Resources,Shenyang |
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| Abstract: | The Linjiang Cu deposit, located in Changbai country, Jilin Province, is a typical skarn deposit. On the basis of previous studies, a study of LA-ICP-MS zircon U-Pb dating analysis is performed on quartz diorite-porphyrite in order to restrain its metallogenic epoch. The ages obtained can be subdivided into two groups. The first group contains two zircons with 206Pb/238U 128.7±2.8Ma and 131.4±3.78Ma, belong to captured detrital zircons. The second group contains 16 zircons, with weighted mean 206Pb/238U age of 122.6±1.1Ma(n=16,MSWD=0.80), which was interpreted to be the crystallization age of quartz diorite-porphyrite. Combining with zircon characteristics and the genetic type of ore deposit, indicate that this deposit mineralization occurred in early Cretaceous. Combining with regional tectonic evolution, we assume that the Linjiang Cu deposit formed in the subduction of the Pacific Plate beneath Eurasia. |
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| Keywords: | Quartz diorite-porphyrite LA-ICP-MS U-Pb Ore-forming environment Linjiang copper deposit Jilin Province |
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