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| 德兴铜厂斑岩铜矿成矿流体演化特征 | |
| 引用本文： | 姚静,倪培,赵葵东,王洪涛.德兴铜厂斑岩铜矿成矿流体演化特征[J].矿物岩石地球化学通报,2012,31(2):97-104. |
| 作者姓名： | 姚静 倪培 赵葵东 王洪涛 |
| 作者单位： | 1. 南京大学表生地球化学研究所,地球科学与工程学院,南京210093;南京大学内生金属矿床成矿机制研究国家重点实验室,地质流体研究所,地球科学与工程学院,南京210093 2. 南京大学内生金属矿床成矿机制研究国家重点实验室,地质流体研究所,地球科学与工程学院,南京210093 3. 南京大学表生地球化学研究所,地球科学与工程学院,南京210093 |
| 基金项目： | 全国危机矿山接替资源找矿成矿规律总结项目 |
| 摘 要： | 为探讨成矿流体的特征和演化过程,对德兴铜厂斑岩铜矿床不同蚀变—矿化带石英细脉中的流体包裹体进行详细的岩相学观察、显微测温、显微激光喇曼探针工作.结果显示,德兴铜厂斑岩铜矿主要有三类流体包裹体:富液相包裹体(Ⅰ型),富气相包裹体(Ⅱ型)、多相包裹体(Ⅲ型)；成矿早期的Ⅰ型包裹体,主成矿期的Ⅱ型和Ⅲ型包裹体,以及成矿晚期的Ⅰ型包裹体的平均均—温度和平均盐度分别为:481℃,8.1％; 410℃,1.2％；389℃,56％和215℃,3.1％；主成矿期的Ⅱ型和Ⅲ型包裹体的平均均—温度相近,但盐度相差很大,指示了沸腾作用的发生；从早期到晚期,成矿流体呈现温度降低,挥发分逸出的趋势. |
| 关 键 词： | 流体包裹体 石英细脉 成矿流体 斑岩铜矿 德兴 |
Evolution of Ore-forming Fluids in the Tongchang Porphyry Copper Deposit,Dexing, Northeast Jiangxi Province |
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| YAO Jing , NI Pei , ZHAO Kui-dong , WANG Hong-tao.Evolution of Ore-forming Fluids in the Tongchang Porphyry Copper Deposit,Dexing, Northeast Jiangxi Province[J].Bulletin of Mineralogy Petrology and Geochemistry,2012,31(2):97-104. | |
| Authors: | YAO Jing NI Pei ZHAO Kui-dong WANG Hong-tao |
| Institution: | 1.Istitute of Surfacial Geochemistry of Nanjing University,School of Earth Science and Engineering, Nanjing 210093,China;2.State Key Laboratory for Mineral Deposit Research,Institute of Geo-Fluids, School of Earth Science and Engineering,Nanjing University,Nanjing 210093,China |
| Abstract: | This paper discusses the characteristics and the evolution of the ore-forming fluids in the Tongchang porphyry copper deposit of Dexing on the basis of the analyses of petrography,microthermometry and raman on fluid inclusions in the quartz veins of different alteration-mineralizaiton belts.The results show that: There are three types fluid inclusions: Liquid(H2O)-rich fluid inclusions(I),gas-rich fluid inclusions(II),multiphasic fluid inclusions(III).The homogenization temperature and salinity of the I type fluid inclusion in the early stage is 481℃ and 8.1%,respectively;the homogenization temperatures and salinities of II,III types fluid inclusions in the ore-forming stage are 410℃,389℃ and 1.2%,56%,respectively;the homogenization temperature and salinity of the I type fluid inclusion in the late stage is 215℃and 3.1%,respectively.Fluid inclusions of II and III types have similar homogenization temperature and very different salinity,which implies that the ore-forming fluids have been boiled in this stage.When boiling,CO2 and water are immiscible,most CO2 get into the II type inclusions.Boiling and immiscibility of fluid are very important for the mineralization;from the early stage to the late stage,the temperature and the content of CO2 of the ore-forming fluids decreased. |
| Keywords: | fluid inclusions quartz veinlet ore-forming fluid porphyry copper deposit Dexing |
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