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July 26, 2026MineralsOpen Access

Multi-Scale Pore Structure Characterization and Elemental Geochemistry of Source Rocks in the Upper Cretaceous Qingshankou Formation, Songliao Basin, NE China

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Authors

ZWZhongrui WuSZSun Zhong-liangZLZX Li

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Overview

Research explores geochemistry and pore structures of lacustrine shales, indicating impacts on hydrocarbon resources.

Key Points

  • This research aims to understand the factors driving organic matter accumulation and pore structure development in lacustrine shales.
  • Analyzed shales from the Upper Cretaceous Qingshankou Formation for total organic carbon (TOC) content and thermal maturity using Rock-Eval pyrolysis.
  • Examined mineralogical composition focusing on quartz, clay minerals, and feldspar.
  • Characterized pore structure through volumetric measurements of micropores, mesopores, and macropores.
  • TOC contents ranged from 0.62 to 3.13 wt%, with thermal maturity indicating a transition from early to peak oil window (Tmax avg. 439 °C).
  • Pore volume analysis showed average micropore volumes of 0.0053 cm3/g and meso/macropore volumes averaging 0.0233 cm3/g.
  • Geochemical proxies suggest deposition in arid to semi-arid conditions, with high paleoproductivity influencing organic matter enrichment.

Cite This Study

Wu et al. (2026) studied this question.

synapsesocial.com/papers/6a65a3e4d3aea3239cd76c65https://doi.org/10.3390/min16080765
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Geochemical Characteristics and Paleoenvironmental Reconstruction of the Cretaceous Qingshankou Formation Shales in the Southeastern Uplift of the Songliao Basin: A Case Study from the Niaohexiang Section of Binxian, China2026 · 2 citations
  2. 2Process-Based Geochemical Constraints on Organic Matter Enrichment and Shale Oil Potential in the Upper Jiufotang Formation, Ludong Sag, NE China2026
  3. 3Lithofacies-Controlled Pore Characteristics and Mechanisms in Continental Shales: A Case Study from the Qingshankou Formation, Songliao Basin2025 · 1 citations
  4. 4A “Salt–Paleowater Depth–Productivity” Triad Controlling Storage: An Integrated Framework of Organic-Matter Enrichment in Qingshankou Shales, Qian’an, Songliao Basin2026
  5. 5Lithofacies-Constrained Pore Networks in Lacustrine Shales: Multi-Scale Characterization of the Lower Cretaceous Shahezi Formation, NE China2026