| Citation: | Hanlin Liu, Caineng Zou, Rukai Zhu, Songtao Wu, Jingwei Cui, Zhen Qiu, Guolong Liu, Mingzhen Zhang. Accumulation Mechanism of Organic Matters in Paleogene Qaidam Basin, Northwestern China. Journal of Earth Science, 2025, 36(5): 2117-2137. doi: 10.1007/s12583-025-0179-4
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The high-quality laminated source rock organic matter (OM) originated from planktonic algae, and its sedimentation was affected by global climate change significantly in the upper Xiaganchaigou Formation of the western Qaidam Basin. However, coupling research on the paleoenvironment change and OM enrichment during the sedimentation period of the source rock is still lacking. This study from the aspects of sedimentary petrology, geochemistry and paleontology palynology, the paleoenvironment of source rock is restored and the OM enrichment model is established in the study area. Firstly, kerogen maceral identification indicates that the kerogen maceral is mainly composed of
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