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The chemical and isotopic compositions of volatiles in magmatic hydrothermal fluids beneath the Songliao Basin, northeastern China

文献类型：期刊论文

作者Gao, Jinliang1,2; Liu, Jiaqi1; Hilton, David R.3; Meng, Fanchao4; Li, Zhongping5; Zhai, Lina6; Sun, Chunqing1; Zhang, Lei1
刊名CHEMICAL GEOLOGY
出版日期2017-08-20
卷号465页码:11-20
ISSN号0009-2541
关键词Quartz vein Fluid inclusions Gas geochemistry Songliao Basin
DOI10.1016/j.chemgeo.2017.05.015
文献子类Article
英文摘要It is controversial whether deep fluids can make contributions to natural gas accumulations in the Songliao Basin, NE China. The occurrence of magmatic hydrothermal quartz veins in crystalline basement of the basin provides a way to understand the characteristics of deep fluids and their significance for natural gas accumulation. Three types of fluid inclusions were identified in hydrothermal quartz: aqueous inclusions, H2O-CO2-rich inclusions and H2O-CO2-CH4-rich inclusions. The primary inclusions show high homogenization temperatures (280-433 degrees C) which are typical of magmatic hydrothermal fluids. The oxygen and hydrogen isotopic compositions (delta O-18 and delta D) of water are 2.0 parts per thousand to 4.6 parts per thousand and -91.6 parts per thousand to -75.7 parts per thousand, respectively. The O-H isotopic compositions suggest that hydrothermal fluids associated with the quartz veins were derived from the primary magmatic system and mixed by small amounts of meteoric water. Two types of magmatic hydrothermal volatiles were identified in the study. Both types of volatiles are dominated by CO2. CO2 in type I volatiles shows more negative delta C-13 values (13.8 parts per thousand to 9.79 parts per thousand) than typical magmatic CO2, which likely resulted from carbon isotopic fractionation during magma degassing. Type II volatiles have higher delta C-13 values (-5.5 parts per thousand to -3.3 parts per thousand) and are similar to typical magmatic CO2. Small amounts of hydrocarbons were observed in both types of magmatic hydrothermal fluids. Hydrocarbons in type I volatiles have relatively high delta(13)CcH, values (-30.6 parts per thousand to -24.1 parts per thousand) and reversed carbon isotopic trends while hydrocarbons in type II volatiles have more negative delta C-13(CH4) values (49.7 parts per thousand to 37.6 parts per thousand) and orderly carbon isotopic trends. CO2 in hydrothermal fluids is a potential source for CO2 gas accumulations. Hydrocarbons in hydrothermal fluids, however, can hardly make significant contributions to the commercial gas reservoirs due to their low concentration.
WOS关键词NE CHINA ; HYPERALKALINE SPRINGS ; ABIOGENIC METHANE ; FAULT-DEPRESSION ; EASTERN CHINA ; CARBON ; CONSTRAINTS ; ORIGIN ; CO2 ; FRACTIONATION
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000403992000002
资助机构National Natural Science Foundation of China(41476034 ; Fundamental Research Funds for the Central Universities(15CX05007A) ; 41302102 ; 41572321) ; National Natural Science Foundation of China(41476034 ; Fundamental Research Funds for the Central Universities(15CX05007A) ; 41302102 ; 41572321) ; National Natural Science Foundation of China(41476034 ; Fundamental Research Funds for the Central Universities(15CX05007A) ; 41302102 ; 41572321) ; National Natural Science Foundation of China(41476034 ; Fundamental Research Funds for the Central Universities(15CX05007A) ; 41302102 ; 41572321)
源URL[http://ir.iggcas.ac.cn/handle/132A11/50256]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Meng, Fanchao
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Calif San Diego, Scripps Inst Oceanog, Geosci Res Div, Fluids & Volatiles Lab, La Jolla, CA 92093 USA
4.China Univ Petr, Sch Geosci, Qingdao 266580, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource Res, Lanzhou 730000, Peoples R China
6.Peking Univ, Sch Earth & Space Sci, Minist Educ, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China
推荐引用方式
GB/T 7714		 Gao, Jinliang,Liu, Jiaqi,Hilton, David R.,et al. The chemical and isotopic compositions of volatiles in magmatic hydrothermal fluids beneath the Songliao Basin, northeastern China[J]. CHEMICAL GEOLOGY,2017,465:11-20.
APA Gao, Jinliang.,Liu, Jiaqi.,Hilton, David R..,Meng, Fanchao.,Li, Zhongping.,...&Zhang, Lei.(2017).The chemical and isotopic compositions of volatiles in magmatic hydrothermal fluids beneath the Songliao Basin, northeastern China.CHEMICAL GEOLOGY,465,11-20.
MLA Gao, Jinliang,et al."The chemical and isotopic compositions of volatiles in magmatic hydrothermal fluids beneath the Songliao Basin, northeastern China".CHEMICAL GEOLOGY 465(2017):11-20.

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来源：地质与地球物理研究所

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