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吉林省新华龙钼矿床流体包裹体
  • ISSN号:1671-5888
  • 期刊名称:吉林大学学报(地球科学版)
  • 时间:2013
  • 页码:1878-1888
  • 分类:P618.65[天文地球—矿床学;天文地球—地质学]
  • 作者机构:[1]吉林大学地球科学学院,长春130061, [2]中国地质科学院矿产资源研究所,北京100037, [3]吉林大学学报编辑部,长春130026
  • 相关基金:吉林省科技发展规划项目(20100450);中国地质调查局计划项目(12120113090100);中国地质调查局地质调查项目(1212011220936);国家自然科学基金项目(41172072)
  • 相关项目:小兴安岭北麓浅成热液金矿系统的深部地质过程与成矿研究
中文摘要:

新华龙钼矿床位于中国东北地区吉林省东部,是一个新发现的斑岩型钼矿床。矿床产于花岗闪长宽岩中。矿床成矿阶段包括石英一浸染状辉钼矿、石英一网脉状辉钼矿、石英-黄铁矿-黄铜矿、石英-多金属硫化物和石英-碳酸盐化5个阶段。流体包裹体实验结果表明:流体包裹体的类型主要为气液两相包裹体,其次为纯气相和纯液相包裹体,还有少量舍子矿物的多相包裹体。流体包裹体的均一温度为172~385℃,盐度(w(NaCl))为8.51%~45.44%。从早阶段到晚阶段成矿流体温度具有规律的演化,均一温度分别为360~390℃、270~350℃、250~260℃、220~230℃、170~190℃。其中:含子矿物多相包裹俸均一温度为272~385℃,盐度为35.79%~45.44%,密度为1.07~1.08g/cm3;气液两相包裹体均一温度为172~381℃,盐度为8.51%~23.36%,密度为0.70~0.99g/cm3。激光拉曼光乙谱分析表明,包襄体的气体成分主要为CO2、H2O、N2和CH4。包裹体岩相学及测温表明,流体由早期的高温、高盐度、含二氧化碳的含矿流体在主成矿阶段发生流体包裹体的沸腾、CO2选出、温度降低等过程,导致大量金属硫化物沉淀。结合氢氧同位素特征,初步确定该矿床的成矿流体主要以岩浆水为主,后期有大气水的加入。流体沸腾是新华龙钼矿床成矿的重要机制。

英文摘要:

The Xinhualong molybdenum deposit, discovered porphyry deposit. The orebodies are located in the eastern Jilin Province, is a newly mainly hosted in granodiorite-porphyry. The hydrothermal ore-forming processes can he divided into five stages= quart~disseminated molybdenite, quartz-stockwork molybdenite, quartz-pyrite-chalcopyrite, quartz-polymetallic sulfides, quartz- carbonate. Some conclusions have been drawn through petrographic observation of fluid inclusions in this deposit= there are mainly gas liquid two phase (Lq-V) inclusions, subordinately pure gas (V) and pure liquid inclusions (L), and minor daughter minerals bearing multiphase inclusions (L+V+S). The homogenization temperatures of fluid inclusions regularly change from the early stage to the late stage.The homogenization temperatures and salinities of fluid inclusions ranges from 172 - 385 ℃, and from 8.51%-45. 44%, respectively. The peak values of homogenization temperatures of fluid inclusions formed in different stages are separately 360 - 390 ℃, 270 - 350 ℃, 250 - 260 ℃, 220 - 230 ℃, 170 - 190 ℃. The homogenization temperatures of daughter minerals bearing inclusions mainly range from 272 -385 ℃, salinities from 35. 79%- 45.44%, and densities from 1.07 - 1.08 g/cm3 respectively. Gas liquid two-phase inclusions are mainly in ranges of 172 -381 ℃, 8.51 %-23.36%, and 0.7 -0.99 g/cm3 respectively. Laser Raman spectroscopy of inclusions indicate that the gas components are CO2, H20, N2 and CH4. Petrographic and microthermometric studies indicate that the ore-forming fluid of the first and the second stage, with high temperature, high salinities, CO2-bearing, took place boiling. The fluid boiling resulted in CO2 escaping, temperature decreasing and abundant metal sulfides precipitating. Moreover, data of oxygen and hydrogen isotope indicate that the ore-forming hydrothermal fluid was dominated by magmatic water with mixing of meteoric water in the later stage, and the mechanism for ore-metals precipitation is fluid-

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期刊信息
  • 《吉林大学学报:地球科学版》
  • 中国科技核心期刊
  • 主管单位:中华人民共和国教育部
  • 主办单位:吉林大学
  • 主编:林学钰
  • 地址:长春市西民主大街938号
  • 邮编:130026
  • 邮箱:jdxbdxb@jlu.edu.cn
  • 电话:0431-88502374
  • 国际标准刊号:ISSN:1671-5888
  • 国内统一刊号:ISSN:22-1343/P
  • 邮发代号:12-22
  • 获奖情况:
  • 国内外数据库收录:
  • 美国化学文摘(网络版),荷兰文摘与引文数据库,美国地质文献预评数据库,美国剑桥科学文摘,英国动物学记录,美国石油文摘,中国中国科技核心期刊,中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版)
  • 被引量:17208