期刊文献+

青海都兰县下得波利铜钼矿区锆石U-Pb测年及流体包裹体研究 预览 被引量:22

SIMS zircon U-Pb dating and fluid inclusion studies of Xiadeboli Cu-Mo ore district in Dulan County,Qinghai Province,China
在线阅读 下载PDF
收藏 分享 导出
摘要 下得波利铜钼矿为近年新发现的斑岩型矿床,位于青海省昆南构造带。本文在详细调查矿区地质特征基础上,开展了花岗斑岩的年代学、岩石地球化学以及矿床流体包裹体研究。结果表明,下得波利矿区花岗斑岩的锆石SIMSU-Pb年龄为244.2±2.1Ma;成矿斑岩为钙碱性系列,具高硅(SiO2=72.00%~74.92%)、富铝(Al2O3=13.60%~14.52%)、低钾(K2O=1.86%~1.72%),富集轻稀土元素((La/Yb)N=11.83~5.64)和大离子亲石元素(LILE),亏损高场强元素(HFSE)等特征;流体包裹体的主要类型有富液相包裹体、富气相包裹体和含子矿物包裹体,与成矿作用密切相关的流体包裹体均一温度主要集中在250~310℃之间,盐度介于2.77%~32.27%NaCleqv,认为成矿流体不混溶作用所引起的富含挥发份物质的流体分离,是造成流体物理化学条件改变和金属元素淀积成矿的主要因素。 The Xiadeboli Cu-Mo deposit is a newly discovered porphyry deposit in the southern of Eastern Kunlun tectonic belt,Qinghai Province.We will describe the basic geological futures of the deposit in this paper and study the geochronology,geochemistry character of the porphyry granite and the fluid character of the deposits.The results of zircon SIMS U-Pb of the granite porphyry in Xiadeboli ore district indicate an age of 244.2±2.1Ma.The porphyry granite is characterized by high SiO2(72.00%~74.92%) 、Al2O3(13.60%~14.52%) and low K2O(1.86%~1.72%) contents,belonging to the clac-alkaline series,while the trace elements of the porphyry granite show LREE((La/Yb) N=11.83~5.64) enrichment,LILE enrichment and HFSE depletion.The main type of the fluid inclusions in the quartz is liquid fluid inclusion while there are also some daughter salt-bearing inclusions and vapor-riched inclusions.The homogenization temperature of fluid inclusions in quartz related to mineralization ranges from 250~310℃ while salinity ranges from 2.77%~32.27% NaCleqv.There are several reasons for the precipitation in Xiadeboli district,but the most important one among which may be the change of the chemistry/physical condition caused by fugacity gas escaping from the parent fluid during the process of the fluid immiscible.
作者 刘建楠 丰成友 亓锋 李国臣 马圣钞 肖晔 LIU JianNan,FENG ChengYou,QI Feng,LI GuoChen,MA ShengChao and XIAO Ye MLR Key Labaratory of Metallogeny and Mineral Resource Assessment,Institute of Mineral Resources,CAGS,Beijing 100037,China
出处 《岩石学报》 SCIE CAS CSCD 北大核心 2012年第2期 679-690,共12页 Acta Petrologica Sinica
基金 q国家自然科学基金重点项目(41030421) 国家自然科学基金面上项目(41172076) 国土资源部“百人计划”项目(200809) 中国地质调查局地质调查项目(1212011085528、1212011120135、1212011121089)联合资助 致谢野外矿区地质调查期间得到了青海省第五地质矿产勘查院杨启安工程师的大力帮助 李献华研究员和陶华老师对锆石U-Pb测年给予指导和大力支持,薛春纪教授对流体包裹体显微测温给予了帮助 张连昌研究员和李厚民研究员仔细审阅了本文初稿,并提出了宝贵意见 在此一并表示衷心的感谢.
关键词 SIMS锆石U-Pb测年 岩石地球化学 流体包裹体 构造环境 下得波利 东昆仑 SIMS zircon U-Pb age Petrochemistry Fluid inclusion Tectonic setting Xiadeboli Eastern Kunlun
  • 相关文献

参考文献35

  • 1Hall DL,Sterner SM and Bodnar RJ.1988.Freezing point depression ofNaCl-KCl-H2O solution.Economic Geology,83(1):197-202. 被引量:1
  • 2She HQ,Li JW,Feng CY,Ma DF,Pan GT and Li GM.2006.Thehigh-temperature and hypersaline fluid inclusions and its implicationsto the metallogenesis in Duobuza porphyry copper deposit,Tibet.Acta Geologica Sinica,80(9):1434-1447(in Chinese withEnglish abstract). 被引量:1
  • 3Gao S,Liu XM,Yuan HL et al.2002.Determination of forty-two majorand trace elements of USGS and NIST SRM glasses by LA-ICPMS.Geostand.Newsl.,26:181-195. 被引量:1
  • 4Chen ZG,Zhang LC,Wang B,Zhang YT and Wu HY.2008.Geochemistry and geological significances of ore-forming porphyrywith Sr and Yb value in Wunugetushan copper-molybdenum deposit,Inner Mongolia.Acta Petrologica Sinica,24(1):115-127(inChinese with English abstract). 被引量:1
  • 5Maniar PD and Piccoli PM.1989.Tectionic discrimination of granitoids.Geological Society of America Bulletin,101:635-643. 被引量:1
  • 6Rui ZY,Zhang LS,Chen ZY,Wang LS,Liu YL and Wang YT.2004.Approach on source rock or source region of porphyry copperdeposits.Acta Pertrologica Sinica,20(2):229-238(in Chinesewith English abstract). 被引量:1
  • 7Batchelor RA and Bowden P.1985.Petrogenetic interpretation granitoidrock series using multicationic parameters.Chem.Geol.,48:43-55. 被引量:1
  • 8Liu CD,Mo XX,Luo ZH,Yu XH,Chen HW,Li SW and Zhao X.2004.Mixing events between the crust and mantle-derived magmasin Eastern Kunlun:Evidence from zircon SHRIMP chronology.Chinese Science Bulletin,49(6):596-602(in Chinese). 被引量:1
  • 9Guo ZF,Deng JF,Xu ZQ,Mo XX and Luo ZH.1998.Late Palzeozoic-Mesozoic intracontinental orogenic process and intermedate-acidic.Geoscience,12(3):344-351(in Chinese with English abstract). 被引量:1
  • 10Pearce JA,Harris NBW and Tindle AG.1984.Trace elementdiscrimination diagrams for the tectonic interpretation of graniticrocks.Journal of Petrology,25:956-983. 被引量:1

二级参考文献578

共引文献876

同被引文献656

引证文献22

二级引证文献123

投稿分析
职称考试

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈