Fluid composition and evolution of the Langxi Ba-F deposit, Yangtze Block, China: New insight from LA-ICP-MS study of individual fluid inclusion
文献类型：期刊论文
| 作者 | Zou, Hao2,3; Li, Min3; Bagas, Leon1,3,5; Li, Yang3; Fang, Yi4; Cao, Hua-Wen6; Jiang, Xiu-Wei3; Chen, Hai-Feng3 |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 125页码:16 |
| 关键词 | Fluid composition and evolution Fluid inclusion study Langxi Ba-F deposit LA-ICP-MS of individual fluid inclusion |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2020.103702 |
| 英文摘要 | The Langxi vein-type Ba-F deposit, located in the southeast of the Sichuan Basin in the central part of Yangtze Block, South China, is hosted by Ordovician limestone. The paragenesis of the deposit's veins is subdivided into pre-, syn- and post-ore stages. The syn-ore stage includes two fluorite generations with the first (Fl-1) deposited at similar to 140 degrees to 200 degrees C and the second (Fl-2) at similar to 140 degrees to 180 degrees C. The syn-ore barite mineralisation was deposited with the temperature range of 110 degrees-160 degrees C, and the syn-ore calcite records a temperature range of 90 degrees to 140 degrees C. These temperature ranges show that the mineralising fluids were low- to moderate in temperature and decreased with the initial deposition of fluorite followed by barite and then calcite. The types of fluid inclusions in the veins are classified as monophase liquid (L-type, type I), biphase liquid + vapour (L + V type, type II) and polyphase (L + V + S type, type III) brine inclusions. The salinity of the mineralising fluid for the three types of inclusions during the deposition of F-Ba-Ca is 0.35-21.7% NaCl eqv., indicating that the ore-forming fluid varied greatly during the mineralising process. There are no obvious differences in the fluid inclusion density in the different minerals with the average densities being 0.98 g/cm(3) for Fl-1, 0.99 g/cm(3) for Fl-2, 1.00 g/cm(3) for barite, and 1.01 g/cm(3) for calcite. This shows that the density of the F-Ba-Ca mineralising fluid belong to a moderate- low density. The deposition of the minerals took place with a change from a reducing to an oxidising environment. The liquid phase initially included Na+ and Cl-, and evolved containing Ca2+, SO42-, K+, and Mg2+ LA-ICP-MS analyses reveal that the L-V type fluid inclusions associated with Fl-1 assays 46,600 ppm Na, 3470 ppm K (with a mean Na/K ratio of similar to 24), similar to 28,200 ppm for Cl, and 1060 ppm Br (with a mean Cl/Br mass ratio of similar to 27). The second-generation fluorite L-V type fluid inclusions average around 47,000 ppm Na and 12,000 ppm K, corresponding to and a Na/K mass ratio of 7. The halogen content of Fl-2 averages 26,200 ppm Cl and 950 ppm Br, corresponding to a Cl/Br mass ratio of 28. These analyses indicate that the mineralising fluid was rich in NaCl, assuming the fluid inclusions represent samples of the mineralising fluid. It is proposed that Ba-F concentrated in the mineralising fluid were derived from basinal fluids mixed with meteoric water circulating through faults at increased temperature gradients. The driving force was Late Cretaceous tectonic activity related to the subduction of the Paleo-Pacific Oceanic Plate. This model is consistent with the geodynamic setting of other barite-fluorite-rich districts in the Yangtze Block of South China. |
| WOS关键词 | MAGMATIC-HYDROTHERMAL ORIGIN ; FREEZING-POINT DEPRESSION ; PB-ZN DEPOSITS ; MINERALIZING BRINES ; GASEOUS COMPOSITION ; FLUORITE DEPOSITS ; METAL TRANSPORT ; SKARNS EVIDENCE ; MOLE-GRANITE ; DISTRICT |
| 资助项目 | National Natural Science Foundation of China[41702108] ; China Postdoctoral Science Foundation[2019M650833] ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution[SKL-K201902] ; Open Fund Project of the State Key Laboratory for Mineral Deposits Research[2019-LAMD-K14] ; Major Cultivating Project of the Sichuan Province Education Department[2018CZ0009] |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000571217000001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; Open Fund Project of the State Key Laboratory for Mineral Deposits Research ; Open Fund Project of the State Key Laboratory for Mineral Deposits Research ; Major Cultivating Project of the Sichuan Province Education Department ; Major Cultivating Project of the Sichuan Province Education Department ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; Open Fund Project of the State Key Laboratory for Mineral Deposits Research ; Open Fund Project of the State Key Laboratory for Mineral Deposits Research ; Major Cultivating Project of the Sichuan Province Education Department ; Major Cultivating Project of the Sichuan Province Education Department ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; Open Fund Project of the State Key Laboratory for Mineral Deposits Research ; Open Fund Project of the State Key Laboratory for Mineral Deposits Research ; Major Cultivating Project of the Sichuan Province Education Department ; Major Cultivating Project of the Sichuan Province Education Department ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; Open Fund Project of the State Key Laboratory for Mineral Deposits Research ; Open Fund Project of the State Key Laboratory for Mineral Deposits Research ; Major Cultivating Project of the Sichuan Province Education Department ; Major Cultivating Project of the Sichuan Province Education Department |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/98256]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Zou, Hao |
| 作者单位 | 1.Univ Western Australia, Ctr Explorat Targeting, 35 Stirling Highway, Crawley, WA 6009, Australia 2.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610059, Sichuan, Peoples R China 4.Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China 5.Xian Ctr China Geol Survey, 438 Youyi Rd, Xian 710054, Shaanxi, Peoples R China 6.China Geol Survey, Chengdu Ctr, Chengdu 610081, Sichuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zou, Hao,Li, Min,Bagas, Leon,et al. Fluid composition and evolution of the Langxi Ba-F deposit, Yangtze Block, China: New insight from LA-ICP-MS study of individual fluid inclusion[J]. ORE GEOLOGY REVIEWS,2020,125:16. |
| APA | Zou, Hao.,Li, Min.,Bagas, Leon.,Li, Yang.,Fang, Yi.,...&Chen, Hai-Feng.(2020).Fluid composition and evolution of the Langxi Ba-F deposit, Yangtze Block, China: New insight from LA-ICP-MS study of individual fluid inclusion.ORE GEOLOGY REVIEWS,125,16. |
| MLA | Zou, Hao,et al."Fluid composition and evolution of the Langxi Ba-F deposit, Yangtze Block, China: New insight from LA-ICP-MS study of individual fluid inclusion".ORE GEOLOGY REVIEWS 125(2020):16. |
入库方式： OAI收割
来源：地质与地球物理研究所
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