Home Journals Articles Updates About
CN
image
收藏切换
Paleoenvironmental Reconstruction and Organic Matter Accumulation Mechanisms in the Cambrian Qiongzhusi Shale: A high-resolution case study of the Chengjiaba section, northern margin of Sichuan Basin
收藏切换
PDF
JiaLe WANG1, Jia RONG2, ZiLiang LIU1, Bo GAO2, MingHe ZHANG1, HuiPing LIU1, QiHang YANG1, Lang YOU1
Acta Sedimentologica Sinica | 2026, 44(4) : 1535 - 1551
Less
收藏切换
Acta Sedimentologica Sinica | 2026, 44(4): 1535-1551
Paleoenvironmental Reconstruction and Organic Matter Accumulation Mechanisms in the Cambrian Qiongzhusi Shale: A high-resolution case study of the Chengjiaba section, northern margin of Sichuan Basin
Full
JiaLe WANG1, Jia RONG2, ZiLiang LIU1, Bo GAO2, MingHe ZHANG1, HuiPing LIU1, QiHang YANG1, Lang YOU1
Affiliations
  • 1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China
  • 2.Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 102206, China
Published: 2026-08-10 doi: 10.14027/j.issn.1000-0550.2025.004
Outline
收藏切换

Objective The shale gas of the Cambrian Qiongzhusi Formation in the Sichuan Basin has good prospects for exploration and development， and a knowledge of its sedimentary environment is necessary to evaluate these resources. Methods The focus of this study was the Chengjiaba section shale series in the Qiongzhusi Formation. A detailed field geological survey and whole rock X-ray diffraction and geochemical analyses were carried out. The elements and ratio parameters in the study area were optimized to determine the sedimentary paleoenvironment of the organic-rich shale. Results （1） The First and Second members of the Qiongzhusi Formation are mainly gray-black or black mudstone and silty mudstone， with siliceous rock and siliceous shale facies. The horizontal bedding indicates a deep-water shelf paleoenvironment. （2） The shale TOC（Total Organic Carbon） is relatively high in the Qiongzhusi Formation， ranging from 0.22% to 4.34% （average 2.68%）. （3） The geochemistry of the elements indicates a warm and humid paleoclimate during the deposition of the black shale. The water body was anoxic and highly retained. Conclusions The formation of organic-rich shale in the Qiongzhusi Formation is controlled by multiple factors. Organic matter enrichment in the First member of the Qiongzhusi Formation conforms to the preservation mode， primarily controlled by redox conditions and sedimentation rate. In contrast， the organic matter enrichment in the Second member of the Qiongzhusi Formation follows the comprehensive model， synergistically controlled by paleoclimate， paleoproductivity， sedimentation rate， and redox conditions.

Sichuan Basin  /  Chengjiaba  /  Qiongzhusi Formation  /  sedimentary environment  /  element geochemistry
JiaLe WANG, Jia RONG, ZiLiang LIU, Bo GAO, MingHe ZHANG, HuiPing LIU, QiHang YANG, Lang YOU. Paleoenvironmental Reconstruction and Organic Matter Accumulation Mechanisms in the Cambrian Qiongzhusi Shale: A high-resolution case study of the Chengjiaba section, northern margin of Sichuan Basin[J]. Acta Sedimentologica Sinica, 2026 , 44 (4) : 1535 -1551 . DOI: 10.14027/j.issn.1000-0550.2025.004
Funding
Less
  • National Natural Science Foundation of China(42272183)
Appendix
Less
Year 2026 volume 44 Issue 4
PDF
81
15
Cite this Article
BibTeX
Article Info
doi: 10.14027/j.issn.1000-0550.2025.004
  • Receive Date：2024-11-20
  • Online Date：2026-09-02
  • Published：2026-08-10
Article Data
Affiliations
History
  • Received：2024-11-20
  • Revised：2025-01-15
  • Accepted：2025-02-24
Funding
National Natural Science Foundation of China(42272183)
Affiliations
    1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China
    2.Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 102206, China

Corresponding:

LIU ZiLiang, E-mail:
References
Share
https://castjournals.cast.org.cn/joweb/cjxb/EN/10.14027/j.issn.1000-0550.2025.004
Share to
QR

Scan QR to access full text

Cite this article
BibTeX
Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
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
关闭全屏
  • BibTeX
  • EndNote
  • RefWorks
  • TxT
Links
Articles
Latest Articles
Most Read
Collections
Updates
Events
News
Multimedia
About
About Us
Contact
No. 86 Xueyuan South Road, Haidian District, Beijing
100081
010-62199257
qkjq@cast.org.cn

Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House