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Evidence of Hydrothermal Activity and Its Significance in the Black Shale of Wufeng Formation-Longmaxi Formation, Southeastern Sichuan Basin
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Yi-qing ZHU1, Xue-wen SHI1, Xue YANG1, Wei WU1, Yu-ran YANG1, Jia LIU1, Yi LI1, Huan XU2, Bo RAN2, *
Science Technology and Engineering | 2025, 25(10) : 4067 - 4077
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Science Technology and Engineering | 2025, 25(10): 4067-4077
Papers·Petroleum and Natural Gas Industry
Evidence of Hydrothermal Activity and Its Significance in the Black Shale of Wufeng Formation-Longmaxi Formation, Southeastern Sichuan Basin
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Yi-qing ZHU1, Xue-wen SHI1, Xue YANG1, Wei WU1, Yu-ran YANG1, Jia LIU1, Yi LI1, Huan XU2, Bo RAN2, *
Affiliations
  • 1 PetroChina Southwest Oil and Gas Field Company, Chengdu 610051, China
  • 2 School of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
Published: 2025-04-08 doi: 10.12404/j.issn.1671-1815.2403714
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The influence of hydrothermal fluids on fluid-rock interactions and hydrocarbon generation in basins is of great significance. The mineralogical and geochemical characteristics of hydrothermal activity in the black shale of the Wufeng Formation-Longmaxi Formation in southeastern Sichuan was investigated using advanced techniques such as large field splicing scanning electron microscopy, mineral quantitative analysis, X-ray diffraction, isotopes, and electron probes. The results show that non-metallic minerals such as barium ice feldspar, calcite, apatite, and barite, as well as metal minerals like sphalerite, pyrite, galena, and chalcopyrite, exhibit distinct characteristics of hydrothermal activity. The in-situ Sr isotope ratio of barite ranges from 0.719 76 to 0.723 94, with an average of 0.722 37. The carbonate mineral content is exceptionally high, up to 60%. Based on previous research, mineralogical and geochemical indicators for hydrothermal fluid activity in the Wufeng Formation-Longmaxi Formation of southeastern Sichuan were established, suggesting that hydrothermal fluids have detrimental effects on reservoir space.

hydrothermal fluid  /  black shale  /  Wufeng Formation-Longmaxi formation  /  southeastern Sichuan
Yi-qing ZHU, Xue-wen SHI, Xue YANG, Wei WU, Yu-ran YANG, Jia LIU, Yi LI, Huan XU, Bo RAN. Evidence of Hydrothermal Activity and Its Significance in the Black Shale of Wufeng Formation-Longmaxi Formation, Southeastern Sichuan Basin[J]. Science Technology and Engineering, 2025 , 25 (10) : 4067 -4077 . DOI: 10.12404/j.issn.1671-1815.2403714
Year 2025 volume 25 Issue 10
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Article Info
doi: 10.12404/j.issn.1671-1815.2403714
  • Receive Date:2024-05-20
  • Online Date:2025-07-09
  • Published:2025-04-08
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  • Received:2024-05-20
  • Revised:2025-01-03
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    1 PetroChina Southwest Oil and Gas Field Company, Chengdu 610051, China
    2 School of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
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表12种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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