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Ore fluid geochemistry of the Jinlongshan Carlintype gold ore belt in Shaanxi Province, China
  • ISSN号:2096-0956
  • 期刊名称:《中国地球化学学报:英文版》
  • 时间:0
  • 分类:P618.51[天文地球—矿床学;天文地球—地质学]
  • 作者机构:[1]State Key laboratory of Geological Processes and Mineral Resources, China University of Geoscienees, Beijing 100083, China, [2]Laboratory of Crust and Orogen Evolution, Peking University, Beijing 100871, China, [3]Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China, [4]Department of Geology, Northwest University, Xi' an 710069, China
  • 相关基金:Granted by the National Natural Science Foundation of China (Projects Nos, 49672119, 49972035, 40352003, and 40425006) and the Hundred Young Scientists Program of Chinese Academy of Sciences.
中文摘要:

在南部的 Shaanxi 省的 Jinlongshan 金矿带在 Qinling collisional orogenic 包含很多张巫婆类型金矿床。他们的液包体具有 Na~+-Cl~- 类型。从到以后的舞台上演的主要 metallogenic,为液包体的阴离子和阳离子,温度和 deoxidation 参数(R) 的全部的数量都逐渐地减少了,建议液体氧化, metallogenicdepth 的减小和天落水和器官的部件的输入的渐渐的增强。存款在外壳的高举期间被形成并且因此有类似的构造背景到 orogenic 金矿床。矿石液体的 CO_2contents 和 CO_2/H_2O 价值增加了从早,到迟了的阶段,和 thewall 岩石,改变被 decarbonation 代表,它与 orogenic 的特征不一致金矿床。它也被发现那 Na~+ , K~+ , SO_4~(2-) , Cl~-- 并且在在石英的包括的阴离子和阳离子的全部的数量比在共存的方解石的那些高。H, 0 并且 C 同位素比显示矿石液体从天落水和招待矿石的沉积岩的变形 devolatilisation 被采购。墙岩石的高背景δ~( 18 ) O 和δ ~( 13 ) C 价值导致了 O 和δ ~( 13 ) C 矿石液体和也高的δ ~( 18 ) O 和δ ~( 13 ) C 价值珍视的高δ ~( 18 )象石英和碳酸盐那样的热水的矿物质。在矿石液体的碳主要源于招待阶层。C Fe 方解石和液包体的δ D 价值珍视的δ ~(18 ) O 和δ ~(13 ) 是比方解石和石英的那些低的。以配位化学的理论,相反,所有这些差别能在一样的液体系统被归功于到水岩石相互作用到矿石液体的多来源。

英文摘要:

The Jinlongshan gold ore belt in southern Shaanxi Province contains a number of Carlin-type gold deposits in the Qinling collisional orogenic belt. Their fluid inclusions are of the Na^+ - Cl^- type. From the main metallogenic stage to later stages, the total quantity of anions and cations, temperature and deoxidation parameter (R) for fluid inclusions all gradually decreased, suggesting the gradual intensification of fluid oxidation, the reduction of metallogenic depth and the input of meteoric water and organic components. The deposits were formed during crustal uplifting and hence had similar tectonic settings to orogenic gold deposits. The CO2 contents and CO2/H2O values of the ore fluid increased from early to late stages, and the wall-rock alteration is represented by decarbonation, which is inconsistent with the characteristics of orogenic gold deposits. It is also discovered that Na^+, K^+ , SO^2-4, Cl^- and the total amounts of anions and cations in the inclusions in quartz are higher than those in the coexisting calcite. The H2 O and C isotope ratios indicate that the ore fluid was sourced from meteoric water and metamorphic devolatilisation of the sedimentary rocks that host the ores. The high background δ^18O and 8 δ^13C values of wall rocks resulted in high δ^18O and δ^13C values of ore fluid and also high δ^18O and δ^13C values of hydrothermal minerals such as quartz and carbonate. The carbon in ore fluid stemmed largely from the hosting strata. The δ^18O and δ^13C values of Fe-calcite and the 8D values of fluid inclusions are lower than those of calcite and quartz. In terms of the theory of coordination chemistry, all these differences can be ascribed to water-rock interaction in the same fluid system, instead, to the multisource of ore fluid.

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期刊信息
  • 《中国地球化学学报:英文版》
  • 主管单位:中国科学院出版图书情报委员会
  • 主办单位:中科院地球化学研究所
  • 主编:欧阳自远
  • 地址:贵阳市观水路73号中科院地球化学研究所
  • 邮编:550002
  • 邮箱:hzl@mails.gyig.ac.cn
  • 电话:6221345
  • 国际标准刊号:ISSN:2096-0956
  • 国内统一刊号:ISSN:52-1161/P
  • 邮发代号:2-577
  • 获奖情况:
  • 92年度获全国优秀期刊二等奖,96年度获中科院优秀期刊二等奖,96年度获全国优秀期刊三等奖
  • 国内外数据库收录:
  • 美国化学文摘(网络版),荷兰地学数据库,荷兰文摘与引文数据库,美国工程索引,美国地质文献预评数据库,美国剑桥科学文摘,英国科学文摘数据库,美国石油文摘
  • 被引量:282