| 四川省九龙县黑牛洞富铜矿矿床黑云母40Ar-39Ar测年及其地质意义 |
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| 引用本文： | 马国桃.四川省九龙县黑牛洞富铜矿矿床黑云母40Ar-39Ar测年及其地质意义[J].地质学报,2009,83(5):671-679. |
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| 作者姓名： | 马国桃 |
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| 作者单位： | 1. 成都地质矿产研究所,成都,610082
2. 四川里伍铜业股份有限公司,四川甘孜,626200 |
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| 基金项目： | 国家资源补偿费“四川九龙县里伍铜矿外围普查”项目（编号：1212010630404）和 “四川省九龙县黑牛洞铜矿详查” 项目 |
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| 摘 要： | 四川省九龙县黑牛洞铜矿床为近期新发现的一个规模在中型以上，产于江浪变质核杂岩中的富铜矿床。本文测试了黑牛洞铜矿床中与成矿密切相关的黑云母的40Ar/39Ar年龄为136.43±0.77 Ma，说明黑牛洞矿床形成于燕山中期。结合矿区附近李伍富铜床矿床地质特征及成矿年龄，表明黑牛洞铜矿床与李伍铜矿床为同一时期形成的矿床，两者成矿与松潘－甘孜造山带大规模岩浆热事件有关，这对于重新认识李伍铜矿床外围找矿潜力和进一步指导找矿工作具有重要意义。
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| 关 键 词： | 40Ar/39Ar定年 成矿年代 富铜矿床 江浪变质核杂岩 黑牛洞 |
| 收稿时间： | 2008/10/23 0:00:00 |
| 修稿时间： | 2008/10/23 0:00:00 |
40Ar-39Ar Dating of Biotite from the Heiniudong Copper Deposit in Jiulong County ,Sichuan, and Its Geological Significance |
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| maguotao.40Ar-39Ar Dating of Biotite from the Heiniudong Copper Deposit in Jiulong County ,Sichuan, and Its Geological Significance[J].Acta Geologica Sinica,2009,83(5):671-679. |
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| Authors: | maguotao |
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| Institution: | Chengdu Institute of Geology and Mineral Resources |
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| Abstract: | The Heiniudong copper deposit, situated in the Songpan-Ganzi orogenic belt, is the high copper content deposit which is located in the Jianglang metamorphic core complex. The 40Ar/39Ar plateau age of biotite is (136.43±0.77 Ma ), which shows that the Heiniudong deposit was formed in Middle Yanshannian periods. The mineralization characteristics and metallogenic epoch of Heiniudong deposit is the same with the Liwu deposit in the east of the Jianglang metamorphic core complex. We conclude the mineralization of the two copper deposit is related to the granitoids which formed the metamorphic core complex belt in the Songpan-Ganzi terrane. This discovery is of great significance both in theory and practice for finding copper deposits in the region. |
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| Keywords: | 40Ar/39Ar method of dating metallogenic epoch high copper content deposit Jianglang metamorphic core complex Heiniudong |
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