Geological and geochemical evidences for two sources of hydrothermal fluids found in Ordovician carbonate rocks in northwestern Tarim Basin

	Geological and geochemical evidences for two sources of hydrothermal fluids found in Ordovician carbonate rocks in northwestern Tarim Basin
	Pan WenQing 1,2; Hu XiuFang 3; Liu YaLei 4; Gao QiDong 3; Ye Ying 3
刊名	ACTA PETROLOGICA SINICA
	2012-08-01
卷号	28 期号:8 页码:2515-2524
关键词	Fluid inclusion Trace elements Sulfur isotope Magmatic hydrothermal Stratigraphic hydrothermal Tarim Basin
ISSN号	1000-0569
文献子类	Article
英文摘要	The northwestern margin of Tarim Basin, especially the Sickl-Bachu-Kalpin outcrop area, locates in Bachu-Kalpin faulted uplift region where the tectonic activity is strong. It has developed multiple hydrothermal alteration phenomena in Yingshan Group, Lower Ordovician, including sizes of dissolution vug, porous limestone beds, and veins either filled by fluorite, sulfur, or gypsum mines. In this paper, based on outcrop observations, 118 samples were analyzed, including the fluid inclusion analysis, trace elements analysis and sulfur isotope analysis, respectively. The results show that two types of fluid sources exist in this area: the magnetic hydrothermal fluid and stratigraphic hydrothermal fluid. (1) Magmatic hydrothermal fluid mainly impact in the southwest section of the study area, with minerals products (fluorite, barite, galena, etc.), corresponding to the low salinity fluid inclusions (mainly 0.5% to 7. 5% NaCleqv) and relatively high homogenization temperatures (142 similar to 283 degrees C); while the stratigraphic hydrothermal fluid focuses on the north eastern part of the study area, with minerals products such as dolomite, calcite and quartz, whose fluid inclusions show higher salinity (16% to 23. 3% NaCleqv) and lower homogenization temperature (70 similar to 138 degrees C); at the same time, the middle part of study area is suffered from the mixture of former two sources, with mediate inclusions salinity ( 7. 5% to 18.3% NaCleqv) and homogenization temperature (142 similar to 163 degrees C). (2) Hydrothermal anhydrite and mineral sulfur are rich in S-32 with an average delta S-34 value -9. 57 parts per thousand, indicating that anhydrite is the product of the reaction between H2S gas and limestone, while the hydrogen sulfide is likely to come from the thermal cracking of organics.
WOS关键词	RESERVOIR ; DOLOMITE ; FLUORITE ; ORIGIN ; MEXICO ; AREA
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000308275200018
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84696]
专题	中国科学院地质与地球物理研究所
通讯作者	Pan WenQing
作者单位	1.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 2.Tarim Oilfield Co, CNPC, Res Inst Petr Explorat & Dev, Korla 841000, Peoples R China 3.Zhejiang Univ, Dept Ocean Sci & Engn, Hangzhou 310058, Zhejiang, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Pan WenQing,Hu XiuFang,Liu YaLei,et al. Geological and geochemical evidences for two sources of hydrothermal fluids found in Ordovician carbonate rocks in northwestern Tarim Basin[J]. ACTA PETROLOGICA SINICA,2012,28(8):2515-2524.
APA	Pan WenQing,Hu XiuFang,Liu YaLei,Gao QiDong,&Ye Ying.(2012).Geological and geochemical evidences for two sources of hydrothermal fluids found in Ordovician carbonate rocks in northwestern Tarim Basin.ACTA PETROLOGICA SINICA,28(8),2515-2524.
MLA	Pan WenQing,et al."Geological and geochemical evidences for two sources of hydrothermal fluids found in Ordovician carbonate rocks in northwestern Tarim Basin".ACTA PETROLOGICA SINICA 28.8(2012):2515-2524.