辽宁青城子矿集区金银矿成矿流体特征和成矿物质来源示踪
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沈阳地质调查中心,沈阳地质调查中心,沈阳地质调查中心,中国地质科学院地质研究所,辽宁省丹东青城子矿业有限公司

基金项目:

国家自然科学基金项目(40772052;41172072)


Forming Fluid Characteristics and Tracing of Oreforming Source Materials of Goldsilver Deposit in the Qingchengzi Ore Concentration Area
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Affiliation:

Shenyang Institute of Geology and Mineral Resources, China Geological Survey,Shenyang Institute of Geology and Mineral Resources, China Geological Survey,Shenyang Institute of Geology and Mineral Resources, China Geological Survey,Institute of Geology, Chinese Academy of Geological Sciences,Liaoning Dandong Qingchengzi Mining Co,Ltd

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    摘要:

    青城子矿集区地处辽东-吉南裂谷带西端,是金银多金属的重要矿集区,其成矿作用复杂,为了深入揭示其成矿流体特征和成矿物质来源,近期作者对矿集区内典型的金银矿床(高家堡子银矿、小佟家堡子金矿、杨树金矿和林家三道沟金矿)的地质特征研究的基础上,开展了流体包裹体测温和激光拉曼成分分析,H、O、C、S、Pb同位素的分析,进行了多元同位素体系的综合示踪。青城子矿集区金银矿床最为发育富液相包裹体,局部发育气相包裹体,个别石英脉中少量发育H2O-CO2三相包裹体和CO2两相包裹体,成矿温度范围大,是多阶段成矿作用发展演化的反映,主成矿温度在120~210℃之间。成矿流体为中温低盐度低密度的水盐流体。激光拉曼成分特征,成矿流体总体属于含H2的H2O-NaCl-CH4-CO2体系,属于还原性流体,具有深源的特征。氢氧同位素结果显示,成矿热液主要来源于岩浆水和大气降水。碳氧同位素结果显示,成矿流体起源或流经含有大量有机质的地层,地层中的有机质可能参与了金的富集成矿。硫同位素特征表明,矿体中的硫来自海水硫酸盐还原硫与深部岩浆热液来源的混合,可能主要来自海水硫酸盐的还原。铅同位素结果表明,金银矿石中铅是地层与岩浆岩的混合铅。

    Abstract:

    Qingchengzi Ore Concentration area is located in the western of LiaodongJinan rift,and it is an important gold and silver polymetallic ore district its complex mineralization, oreforming fluids in order to reveal its depth, into the origin and mineralization model for mineral characteristics,On the basis of the recent set of typical mine gold and silver deposits(Gaojiapuzi silver,Xiaotongjiapuzi,Yangshugou and Linjiasandaogou gold) in the area of research on the geological characteristics,the Author conducted fluid inclusion temperature measurement and laser Raman component analysis, H, O, C, S, Pb isotope analysis, a comprehensive multivariate isotopic tracer system.Gold and silver deposits of Qingchengzi Ore Concentration area in most developed liquidrich inclusions, developed locally by gas inclusions, individual quartz veins in a small threephase development H2O-CO2inclusions and CO2 two-phase inclusions, oreforming temperature range, is more reflecting the evolution of the mineralization stage, the main mineralization at a temperature between 120~210℃.Oreforming fluid is middle temperature in low salinity water and salt density of the fluid.Laser Raman compositional characteristics shows that forming fluids generally belong containing H2of H2O-NaCl-CH4-CO2 system, belonging to reducing fluid, having deep source characteristics.The results of hydrogen and oxygen isotopes show that hydrothermal mineralization mainly from magmatic water and atmospheric precipitation.The results of carbon and oxygen isotopes showed that forming fluids originning or flowing through contains a lot of organic matter formation,organic matter of formation may be involved in the enrichment of gold mineralization.Sulfur isotopic characteristics show that the sulfur ore from mixing seawater sulfate reducing sulfur and magmatic hydrothermal origin, mainly from the possible reduction of seawater sulfate. Lead isotope results indicate that gold and silver ore is a mixture of lead from the formation and magmatic rocks.

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引用本文

杨凤超,宋运红,张朋, 柴鹏,李斌.2016.辽宁青城子矿集区金银矿成矿流体特征和成矿物质来源示踪[J].地质学报,90(10):2775-2785.
YANG Fengchao), SONG Yunhong), ZHANG Peng), CHAI Peng), LI Bin.2016. Forming Fluid Characteristics and Tracing of Oreforming Source Materials of Goldsilver Deposit in the Qingchengzi Ore Concentration Area[J]. Acta Geologica Sinica,90(10):2775-2785.

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  • 收稿日期:2016-03-11
  • 最后修改日期:2016-04-08
  • 录用日期:2016-04-14
  • 在线发布日期: 2016-10-25