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Fluid inclusions and stable isotopes study of Shuanghe Au deposit in western Henan
Gao Shuai1,2,3; Zeng QingDong1,2,3; Chu ShaoXiong1,2,3; Zhou TianCheng1,2,3; Fan HongRui1,2,3; Cheng ZhanDong4; Ma LiuSuo4
2018
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume34Issue:12Pages:3539-3552
AbstractShuanghe Au deposit is a lode gold deposit in the Lushi polymetal mineralization area, located in the southern margin of North China Craton. The Au-bearing veins occur in the fault, cutting the quartz two-mica schist stratum of the Kuanping Group in the Middle Proterozoic. Gold occurs mainly in pyrite- and polymetallic sulfide-quartz/ankerite vein. The alteration ranges outwardly from silicification, pyritization, and carbonation alteration zones with increasing distance from the ore body. The hydrothermal ore-forming process includes the early, middle and late stages, characterized by mineral assemblages of milk white quartz, quartz-pyrite-polymetal sulfides- ankerite and quartz-calcite, respectively. Ore minerals were mainly precipitated in the middle stage. Types of fluid inclusions in this deposit are various, among which the main types are H2O-CO2 inclusions, aqueous inclusion, liquid-rich inclusions and daughter minerals ( NaCl, CaCO3) -bearing inclusions and carbon-bearing inclusions. The fluid inclusions in the early stage milk white quartz are mainly composed of H2O-CO2 inclusions and primary aqueous inclusion. Microthermometric measurements show that the homogenization temperatures of H2O-CO2 inclusions range from 220 degrees C to 350 degrees C with salinity of 3. 89% similar to 16. 55% NaCleqv. Homogenization temperatures of aqueous inclusions have homogenization temperatures ranging from 220 degrees C to 285 degrees C with salinity of 1. 40% similar to 1. 70% NaCleqv. The fluid inclusions in the smoky gray quartz of the main ore stage are mainly composed by H2O-CO2 inclusions, primary aqueous inclusion, NaCl-bearing inclusions and C-bearing inclusions. Microthermometric data show that the homogenization temperatures of H2O-CO2 inclusions range from 189 degrees C to 345 degrees C , with salinity of 3. 33% similar to 20. 23% NaCleqv. Homogenization temperatures of aqueous inclusions range from 180 degrees C to 348 degrees C , with salinity of 0. 88% similar to 14. 97% NaCleqv. The NaCl-bearing inclusions have homogenization temperatures ranging from 210 degrees C to 359 degrees C , with salinity of 30. 92% similar to 42. 50% NaCleqv. Oxygen and hydrogen isotopes indicate magmatic and metamorphic fluid sources (delta(18) O-H2O= 5. 3 parts per thousand similar to 8. 6 parts per thousand, delta D = - 72. 6 parts per thousand similar to 38. 4 parts per thousand). The delta(CV)-C-13-SMOW of hydrothermal carbonate are respectively - 7. 5 parts per thousand similar to 5. 2 parts per thousand and 14. 7 parts per thousand similar to 17 . 0 parts per thousand. The study of fluid inclusions and C-H-O stable isotopes implies that the boiling of the magmatic fluid and the fluid-rock interaction possibly led to the Au precipitation of Shuanghe Au deposit.
KeywordFluid inclusions Stable isotopes Shuanghe Au deposit Southern margin of North China Craton
WOS KeywordNORTH CHINA CRATON ; FREEZING-POINT DEPRESSION ; LODE GOLD DEPOSIT ; U-PB AGES ; MOLYBDENUM DEPOSITS ; XIONGERSHAN REGION ; QINLING MOUNTAINS ; OROGEN ; DESTRUCTION ; CONSTRAINTS
Language英语
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000456931900006
PublisherSCIENCE PRESS
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Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90540
Collection矿产资源研究院重点实验室
Corresponding AuthorZeng QingDong
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Lushi Cty Bur Land & Resource, Lushi 472200, Peoples R China
Recommended Citation
GB/T 7714
Gao Shuai,Zeng QingDong,Chu ShaoXiong,et al. Fluid inclusions and stable isotopes study of Shuanghe Au deposit in western Henan[J]. ACTA PETROLOGICA SINICA,2018,34(12):3539-3552.
APA Gao Shuai.,Zeng QingDong.,Chu ShaoXiong.,Zhou TianCheng.,Fan HongRui.,...&Ma LiuSuo.(2018).Fluid inclusions and stable isotopes study of Shuanghe Au deposit in western Henan.ACTA PETROLOGICA SINICA,34(12),3539-3552.
MLA Gao Shuai,et al."Fluid inclusions and stable isotopes study of Shuanghe Au deposit in western Henan".ACTA PETROLOGICA SINICA 34.12(2018):3539-3552.
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