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  4. 中国科学院新生代地质与环境重点实验室
Diagenetic conditions and geodynamic setting of the middle Permian hydrothermal dolomites from southwest Sichuan Basin, SW China: Insights from in situ U-Pb carbonate geochronology and isotope geochemistry

文献类型：期刊论文

作者Pan, Liyin1,2,3; Hu, Anping1,2; Liang, Feng1,2; Jiang, Lei4,5; Hao, Yi1,2; Feng, Yuexing6; Shen, Anjiang1,2; Zhao, Jianxin6,7
刊名MARINE AND PETROLEUM GEOLOGY
出版日期2021-07-01
卷号129页码:12
关键词Carbonate U-Pb dating Hydrothermal dolomite Emeishan large igneous province Longmenshan fold and thrust belt Sichuan Basin
ISSN号0264-8172
DOI10.1016/j.marpetgeo.2021.105080
英文摘要The presence of hydrothermal dolomites in the middle Permian carbonates from the southwest Sichuan Basin has been suggested by petrographic features including zebra structure and extensive saddle dolomite cementation. Two major tectono-thermal events, i.e., the intensive volcanism related to the Emeishan large igneous province (ELIP) during the latest middle Permian and the tectonic evolution of the Longmenshan Orogenic Belt since the Late Triassic, might have contributed to the regional fluid flow for hydrothermal dolomitization. Here, we apply LA-ICP-MS U-Pb geochronology, petrography and isotopic geochemistry to constrain the diagenetic and geodynamic conditions of these hydrothermal dolomites. These dolomites resulted from injection of hot fluids up to 95 degrees C higher than the ambient temperatures. U-Pb ages (from 216.4 +/- 7.7 Ma to 206 +/- 15 Ma), combined with the highly radiogenic Sr-87/Sr-86 compositions (up to 0.712151), suggest that the previously proposed ELIP-related dolomitization model may not apply to this site. Instead, our new geochronological data suggest a syn-orogenic flow of basinal brines probably driven by thrust-related compression and/or tectonic valving. Moreover, the indistinguishable U-Pb ages and carbon, oxygen and strontium isotopic compositions among the replacement and cement carbonate phases in these hydrothermal dolomites further suggest that the paragenetic sequence of "replacement dolomite -> saddle dolomite -> blocky calcite" was originated from a common fluid in evolution. This study emphasizes the merits of LA-ICP-MS U-Pb dating in addressing the discrimination of, as well as diagenetic and geodynamic conditions for, hydrothermal dolomites.
WOS关键词FLUID INCLUSION THERMOMETRY ; THRUST BELT ; CONTROLLED DOLOMITIZATION ; EASTERN MARGIN ; AGE ; EVOLUTION ; FLOW ; ORIGIN ; CONSTRAINTS ; BASALTS
资助项目China National Science and Technology Major Project[2016ZX05004-002] ; PetroChina Science and Technology Specific Projects[2018A-0103] ; PetroChina Science and Technology Specific Projects[2018D-5006-35]
WOS研究方向Geology
语种英语
WOS记录号WOS:000657409300001
出版者ELSEVIER SCI LTD
资助机构China National Science and Technology Major Project ; China National Science and Technology Major Project ; China National Science and Technology Major Project ; China National Science and Technology Major Project ; PetroChina Science and Technology Specific Projects ; PetroChina Science and Technology Specific Projects ; PetroChina Science and Technology Specific Projects ; PetroChina Science and Technology Specific Projects ; China National Science and Technology Major Project ; China National Science and Technology Major Project ; China National Science and Technology Major Project ; China National Science and Technology Major Project ; PetroChina Science and Technology Specific Projects ; PetroChina Science and Technology Specific Projects ; PetroChina Science and Technology Specific Projects ; PetroChina Science and Technology Specific Projects ; China National Science and Technology Major Project ; China National Science and Technology Major Project ; China National Science and Technology Major Project ; China National Science and Technology Major Project ; PetroChina Science and Technology Specific Projects ; PetroChina Science and Technology Specific Projects ; PetroChina Science and Technology Specific Projects ; PetroChina Science and Technology Specific Projects ; China National Science and Technology Major Project ; China National Science and Technology Major Project ; China National Science and Technology Major Project ; China National Science and Technology Major Project ; PetroChina Science and Technology Specific Projects ; PetroChina Science and Technology Specific Projects ; PetroChina Science and Technology Specific Projects ; PetroChina Science and Technology Specific Projects
源URL[http://ir.iggcas.ac.cn/handle/132A11/102040]  
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Pan, Liyin; Jiang, Lei
作者单位1.China Natl Petr Corp, Key Lab Carbonate Reservoirs, Hangzhou 310023, Peoples R China
2.PetroChina Hangzhou Res Inst Geol, Hangzhou 310023, Peoples R China
3.Univ Kansas, Dept Geol, Lawrence, KS 66045 USA
4.Yangtze Univ, Coll Resources & Environm, Wuhan 430100, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
6.Univ Queensland, Sch Earth & Environm Sci, Brisbane, Qld 4072, Australia
7.Chinese Acad Geol Sci, Beijing SHRIMP Ctr, Inst Geol, Beijing 100037, Peoples R China
推荐引用方式
GB/T 7714		 Pan, Liyin,Hu, Anping,Liang, Feng,et al. Diagenetic conditions and geodynamic setting of the middle Permian hydrothermal dolomites from southwest Sichuan Basin, SW China: Insights from in situ U-Pb carbonate geochronology and isotope geochemistry[J]. MARINE AND PETROLEUM GEOLOGY,2021,129:12.
APA Pan, Liyin.,Hu, Anping.,Liang, Feng.,Jiang, Lei.,Hao, Yi.,...&Zhao, Jianxin.(2021).Diagenetic conditions and geodynamic setting of the middle Permian hydrothermal dolomites from southwest Sichuan Basin, SW China: Insights from in situ U-Pb carbonate geochronology and isotope geochemistry.MARINE AND PETROLEUM GEOLOGY,129,12.
MLA Pan, Liyin,et al."Diagenetic conditions and geodynamic setting of the middle Permian hydrothermal dolomites from southwest Sichuan Basin, SW China: Insights from in situ U-Pb carbonate geochronology and isotope geochemistry".MARINE AND PETROLEUM GEOLOGY 129(2021):12.

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来源：地质与地球物理研究所

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