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| 河南白石坡银矿区花岗斑岩中锆石的SHRIMP U-Pb年龄及其地质意义 | |
| 引用本文： | 李厚民,王登红,张冠,陈毓川,王彦斌,张长青,代军治.河南白石坡银矿区花岗斑岩中锆石的SHRIMP U-Pb年龄及其地质意义[J].地质学报,2007,81(6):808-813. |
| 作者姓名： | 李厚民 王登红 张冠 陈毓川 王彦斌 张长青 代军治 |
| 作者单位： | 1. 中国地质科学院矿产资源研究所,北京,100037;中国地质科学院成矿作用与资源评价重点实验室,北京,100037 2. 河南省地质调查院信阳分院,信阳,464000 3. 中国地质科学院,北京,100037 4. 中国地质科学院地质研究所,北京,100037 |
| 基金项目： | 中国地质调查局项目“我国西部重要成矿区带矿产资源潜力评估”(编号1212010535804)，“中国成矿体系综合研究”(编号1212010634002)，“我国重要矿产和区域成矿规律研究”(编号1212010633903)资助成果 |
| 摘 要： | 河南罗山县涩港镇白石坡银矿床是大别地区重要的银矿床之一,与区内中生代岩浆活动有着密切的时空、成因联系。本文应用SHRIMP方法对白石坡银矿区花岗斑岩中的锆石进行了U-Pb年龄测定,表明花岗斑岩形成于142.0±4.3Ma,这一年龄与附近花岗岩基及陈棚组火山岩的形成时代一致,反映它们是中生代同一岩浆成岩系统的产物,也记录了与银矿成矿作用有关的岩浆活动的时代。该区斑岩型钼矿、浅成火山热液型(金)银矿及膨润土等非金属矿具有密切成因联系,同属与中生代岩浆活动有关的矿床成矿亚系列。 |
| 关 键 词： | 锆石SHRIMPU-Pb年龄 花岗斑岩 白石坡银矿床 河南 |
| 修稿时间： | 2007-01-19 |
SHRIMP U-Pb Age of Zircons from Granitic Porphyry in the Baishipo Silver Deposit, Henan and Its Geological Significance |
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| LI Houmin,WANG Denghong,ZHANG Guan,CHEN Yuchuan,WANG Yanbin,ZHANG Changqin,DAI Junzhi.SHRIMP U-Pb Age of Zircons from Granitic Porphyry in the Baishipo Silver Deposit, Henan and Its Geological Significance[J].Acta Geologica Sinica,2007,81(6):808-813. | |
| Authors: | LI Houmin WANG Denghong ZHANG Guan CHEN Yuchuan WANG Yanbin ZHANG Changqin DAI Junzhi |
| Abstract: | The Baishipo Ag deposit, located in Luoshan County of Henan Province, is an important silver deposits related to Mesozoic magmatism temporal-spatially and genetically. A U-Pb age of zircons (140.6Ma) from the ore-bearing granitic porphyry in the Baishipo silver deposit, dated by the SHRIMP II method, indicates that the ore-bearing granitic rocks formed at the same stage of a regional granitic batholith. That means the silver mineralization might happen in the Mesozoic and have a genetic relationship with granitic magmatism. All of the porphyry-type Mo deposits, epithermal-type Au-Ag deposits and bentonite deposits can be classified as a metallogenetic subseries of mineraldeposits originally related to Mesozoic magamtism. |
| Keywords: | Zircon SHRIMP U-Pb age granitic porphyry Baishipo Ag deposit Henan Province |
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