| 鄂东丰山矿田花岗闪长斑岩体锆石SHRIMP U－Pb定年及其意义 |
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| 引用本文： | 陈富文,梅玉萍,李华芹.鄂东丰山矿田花岗闪长斑岩体锆石SHRIMP U－Pb定年及其意义[J].地质学报,2011,85(1):88-96. |
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| 作者姓名： | 陈富文 梅玉萍 李华芹 |
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| 作者单位： | 国土资源部宜昌地质矿产研究所，湖北宜昌，443005 |
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| 基金项目： | “中国成矿体系综合研究”（1212010634002）和“我国西部重要成矿区带矿产资源潜力评估”（编号1212010535804） |
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| 摘 要： | 鄂东丰山矿田是长江中下游多金属成矿带的重要组成部分，由鸡笼山、丰山和李家湾等大－中型铜金多金属矿床组成。矿体产于燕山期花岗闪长斑岩体与三叠系碳酸盐岩接触带中，成矿作用与燕山期花岗闪长斑岩密切相关。作者采用锆石SHRIMP U－Pb定年方法对鸡笼山和丰山矿区成矿斑岩体进行了年代学研究，获得鸡笼山和丰山花岗闪长斑岩的锆石微区原位SHRIMP U－Pb年龄分别为138±2Ma（95%可信度，MSWD=5.1）和137±2Ma（95%可信度，MSWD=1.4），与前人已报道的鄂东南矿集区内典型铜－金－钼－（钨）矿床中辉钼矿Re－Os等时线年龄（140Ma±）吻合，表明丰山矿田成岩成矿事件均发生于早白垩世。本次研究还在鸡笼山花岗闪长斑岩体中发现了新太古代锆石年龄信息，证实了扬子陆块北缘可能存在新太古－古元古代结晶基底。
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| 关 键 词： | 锆石SHRIMP U－Pb定年 新太古代 花岗闪长斑岩 丰山矿田 鄂东 |
| 收稿时间： | 2008/10/13 0:00:00 |
| 修稿时间： | 2009/6/12 0:00:00 |
SHRIMP U-Pb Zircon Dating for Granodiorite Porphyry of the Fengshan Orefield in Eastern Hubei Province and Its Geological Significance |
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| CHEN Fuwen,MEI Yuping,LI Huaqin.SHRIMP U-Pb Zircon Dating for Granodiorite Porphyry of the Fengshan Orefield in Eastern Hubei Province and Its Geological Significance[J].Acta Geologica Sinica,2011,85(1):88-96. |
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| Authors: | CHEN Fuwen MEI Yuping LI Huaqin |
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| Institution: | CHEN Fuwen,MEI Yuping,LI Huaqin Yichang Institute of Geology and Mineral Resources,MLR,Yichang,Hubei,443005 |
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| Abstract: | As an important part of the polymetallogenic belt on the Middle-Lower Reaches of the Yangtze River,the Fengshan orefield consists of large-medium-sized Cu-Au polymetallogenic deposits,distributed in Jilongshan,Fengshan,and Lijiawan. Orebodies occur within the contact zones of granodiorite porphyry with Triassic carbonate,and the mineralization was closely related to the Yanshanian granodiorite porphyry. Zircon SHRIMP U-Pb dating was carried out for the mineralized granodiorite porphyry and yielded age of 13... |
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| Keywords: | Zircon SHRIMP U-Pb dating Neo-Archean granodiorite porphyry Fengshan orefield Eastern Hubei Province South China |
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