Indicative Significance of H-O Isotope and Fluid Inclusion in Ore-forming Fluid of Pingqiu Gold Mine，Guizhou Province

WU Wenming; LIU Jianzhong; WANG Zepeng; YU Dalong

doi:10.11872/j.issn.1005-2518.2015.06.030

Gold Science and Technology >

2015 , Vol. 23 >Issue 6: 30 - 36

DOI: https://doi.org/10.11872/j.issn.1005-2518.2015.06.030

Indicative Significance of H-O Isotope and Fluid Inclusion in Ore-forming Fluid of Pingqiu Gold Mine，Guizhou Province

WU Wenming ,
LIU Jianzhong ,
WANG Zepeng ,
YU Dalong

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1.105 Production Brigade of Bureau of Geology and Mineral Exploration and Development of Guizhou Province，Guiyang 550018，Guizhou，China；
2.College of Resources and Environment Engineering，Guizhou University，Guiyang 550003，Guizhou，China

Received date: 2015-06-01

Revised date: 2015-09-22

Online published: 2016-02-25

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Abstract

Based on the study of fluid inclusion in gold-containing quartz vein of gold ore in Pingqiu，Jinping and its hydrogen and oxygen isotope composition，this thesis discusses property and source of ore-forming fluid. There are carbon dioxide gas-liquid two-phase and carbon dioxide gas-liquid three-phase based on the composition of fluid inclusion.The test data indicates that fluid inclusion in this area belongs to fluid in the medium and low temperature（159.5～351.8 ℃），low salinity （0.53%～16.71%）and low density（0.58～0.98 g/cm³）.The specific value of Na+/K+ in the fluid phase composition is less than 1，shows that this deposit has magmatic-hydrothermal character.Hydrogen and oxygen isotope composition: δD■is -49‰～-60‰，and δ18O■is 7.30‰～9.00‰.Cultellation in δD-δ18O diagram is distributed in the overrlap region of metamorphic and vivo.According to analysis by synthesis，ore-forming fluid of this gold ore may mainly include magmatic water mixed a lot of metamorphic water.Ore-forming fluid contained gold goes up along with shear zone and second level shear structure（host structure），settling in shear zone and fracture between interlaminations formed by anticline and shearing action，forming lenticular and layered quartz vein gold deposit.

Key words： isotope; fluid inclusions; quartz vein type gold deposit; Pingqiu gold deposit; Guizhou Province

Cite this article

WU Wenming , LIU Jianzhong , WANG Zepeng , YU Dalong . Indicative Significance of H-O Isotope and Fluid Inclusion in Ore-forming Fluid of Pingqiu Gold Mine，Guizhou Province[J]. Gold Science and Technology, 2015 , 23(6) : 30 -36 . DOI: 10.11872/j.issn.1005-2518.2015.06.030

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