| 藏东玉龙斑岩铜矿床多期流体演化与成矿的流体包裹体证据 |
| |
| 引用本文： | 谢玉玲,侯增谦,徐九华,杨志明,徐文艺,何建平.藏东玉龙斑岩铜矿床多期流体演化与成矿的流体包裹体证据[J].岩石学报,2005,21(5):1409-1415. |
| |
| 作者姓名： | 谢玉玲 侯增谦 徐九华 杨志明 徐文艺 何建平 |
| |
| 作者单位： | 1. 北京科技大学,北京,100083
2. 中国地质科学院矿产资源研究所,北京,100037 |
| |
| 基金项目： | 科技部“973”项目“印度-亚洲大陆主碰撞带成矿作用”(编号:2002-CB-412600)综合课题资助 |
| |
| 摘 要： | 通过对王龙斑岩铜矿石英斑晶、辉钼矿石英脉中流体包裹体岩相学、包裹体显微测温分析、包裹体成分的激光拉曼探针分析及包裹体中子矿物的扫描电镜/能谱分析,发现矿化斑岩石英斑晶中发育多期流体包裹体。斑晶中除流体包裹体外尚可见少量熔体包裹体,与斑岩期矿化有关的成矿流体以中高温(200～537℃)、高盐度(29.6～44.7 wt%NaCleq)为特征,与粘土化蚀变有关的流体包裹体以低温、富 Ca 为特征,不同气相充填度的气液两相包裹体与高盐度含子矿物多相包裹体共存,且具有相似的均一温度,显示不混溶流体包裹体特征。温度、压力降低引起的流体不混溶是造成斑岩型矿化矿质沉淀的主要因素,斑岩期流体与浅成低温热液期流体形成于统一的流体系统,为同源演化结果。
|
| 关 键 词： | 玉龙斑岩铜矿床 流体包裹体 流体演化 |
| 文章编号： | 1000-0569/2005/021(05)-1409-15 |
| 收稿时间： | 12 30 2004 12:00AM |
| 修稿时间： | 08 3 2005 12:00AM |
Evolution of multi-stage ore-forming fluid and mineralization: Evidence form fluid inclusions in Yulong porphyry copper deposit, East Tibet |
| |
| Xie YuLing;Hou ZengQian;Xu JiuHua;Yang ZhiMing;Xu WenYi;He JianPing.Evolution of multi-stage ore-forming fluid and mineralization: Evidence form fluid inclusions in Yulong porphyry copper deposit, East Tibet[J].Acta Petrologica Sinica,2005,21(5):1409-1415. |
| |
| Authors: | Xie YuLing;Hou ZengQian;Xu JiuHua;Yang ZhiMing;Xu WenYi;He JianPing |
| |
| Abstract: | Petrographic observation,microthermometry,Laser Raman Microprobe Analysis (LRM) and Scanning Electron Microscope/Energy Dispersion Spectrum(SEM/EDS) was performed to fluid inclusion in phenocryst quartz and molybdenite-quartz vein.Different kinds of inclusions was observed including melt inclusions,two phase aqueous fluid inclusions and multi-phase fluid inclusions with daughter minerals.Most of fluid inclusions in phenocryst quartz formed in K-silicate and quartz-sericite stage.Little melt inclusion survived later alteration.The ore-forming fluid related to K-silicate and quartz-sericite alteration is characterized by K- rich,high temperature and high salinity with meaning of magmatic origin.Argillic alteration is attributed to a Ca-rich,low-temperature fluid.From porphyry mineralization to hypergene mineralization,Ore-forming fluid evolved form NaCl-KCl-H_2O-CO_2(CH_4) to CaCl_2- H_2O-CO_2 system.The authors think that there are some origin affinity between early high temperature,K-rich fluid and later low temperature Ca-rich fluid.K-silicate,quartz sericite and argillic alteration occurred in different evolution stage.Unmixing of fluid caused by falling of pressure and temperature is the dominated factor for mineralization. |
| |
| Keywords: | Yulong porphyry copper deposit Fluid inclusion Fluid evolution |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《岩石学报》浏览原始摘要信息 |
| 点击此处可从《岩石学报》下载免费的PDF全文 |
|
