文献类型：期刊文献

英文题名：Genetic relationship between hydrocarbon system evolution and Carlin-type gold mineralization: Insights from Re–Os pyrobitumen and pyrite geochronology in the Nanpanjiang Basin, South China

作者：Ge, Xiang Selby, David Liu, Junjie Chen, Youzhi Cheng, Guofan Shen, Chuanbo

第一作者：Ge, Xiang

通信作者：Shen, Chuanbo

机构：[1] Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan, 430074, China; [2] Department of Earth Sciences, Durham University, Durham, DH1 3LE, United Kingdom; [3] State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, 430074, China; [4] State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; [5] School of Resources and Environmental Engineering, Guizhou Institute of Technology, Guiyang, 550003, China

第一机构：Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan, 430074, China

通信机构：Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan, 430074, China

年份：2021

卷号：559

外文期刊名：Chemical Geology

收录：EI(收录号：20204409429907);Scopus(收录号：2-s2.0-85094189726)

语种：英文

外文关键词：Deposits - Economic geology - Mineralogy - Oxide minerals - Geochronology - Sulfur compounds - Titanium dioxide - Hydrocarbons - Pyrites - Liquids - Fluid inclusion

摘要：The spatial association of hydrocarbons with metalliferous ore deposits is found worldwide and is particularly common to Carlin-type gold systems. Both liquid oil and pyrobitumen are found in Carlin-type gold deposits of North Nevada, USA and the Nanpanjiang Basin, South China. However, the temporal and genetic association of hydrocarbons and gold mineralization are still debated. To this end, using rheniumosmium (Re–Os) geochronology of pyrobitumen and gold-bearing pyrite from the Laizishan and Banqi reservoirs and the Yata Carlin-type gold deposit in the Nanpanjiang Basin, we consider hydrocarbons played a critical role in the mineralization process. A Re–Os age of 228 ± 16 Ma obtained for highly mature pyrobitumen suggests that liquid oil cracking occurred during the Late Triassic in the Laizishan and Banqi reservoirs. This age is in agreement with the modelled thermal history of the Nanpanjiang Basin. Additionally, a broadly identical gold-bearing pyrite Re–Os age of 218 ± 25 Ma from Yata Carlin-type gold deposit which is in agreement with ages reported for other Carlin-type gold deposits in the Nanpanjiang Basin (e.g., in-situ SIMS U–Pb rutile = 213.6 ± 5.4 Ma, Re–Os arsenopyrite = 204 ± 19 Ma - 235 ± 33 Ma and Rb–Sr illite = 212.8 ± 4.6 Ma) suggests the auriferous Carlin-type systems of the Nanpanjiang Basin also formed during the Late Triassic. Integrating our Re–Os data, with recent liquid hydrocarbon experimental data and fluid inclusion data from both reservoirs and gold deposits within the Nanpanjiang Basin, a methane (CH4) dominated thermochemical sulfate reduction (TSR) process, which introduced hydrogen sulfide (H2S) into basinal fluid and ultimately led to the deposition of gold-bearing pyrite by sulfidation, is considered to be the genetic link between of pyrobitumen and gold-bearing pyrite mineralization of the Carlin-type systems of the Nanpanjiang Basin. ? 2020 Elsevier B.V.