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July 26, 2026Geological Journal

Sedimentary Paleoenvironmental and Diagenetic Control Mechanism of Pores in Lacustrine Shales: A Case Study of Triassic Yanchang Formation Chang 7 3 Sub‐Member, Ordos Basin, NW China

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Authors

DLDelu LiZWZi WangXZXiaochen Zhao

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Overview

Randomized trial investigates pore evolution in lacustrine shales, suggesting diagenesis controls microbial activity.

Key Points

  • This study aims to clarify how sedimentary paleoenvironment and diagenetic processes influence pore structure in lacustrine shales.
  • Analyzed sedimentary and diagenetic features of Chang 7 3 sub-member shale in Ordos Basin.
  • Utilized various techniques including SEM, NMR testing, and XRF spectroscopy.
  • Examined relationships between paleoenvironmental conditions and pore structure traits.
  • Pore evolution in the shale is predominantly controlled by diagenesis, especially compaction and cementation effects.
  • Sedimentary paleoenvironment characterized by warm, humid, and anoxic conditions impacted pore volume and complexity.
  • Marked changes in pore structure were observed due to significant macropore damage and increased proportion of micropores.

Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/6a65a36cd3aea3239cd76903https://doi.org/10.1002/gj.70427
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