THE SOURCE ROCKS OF MESOPROTEROZOIC TIELING FORMATION IN LINGYUAN-NINGCHENG BASIN: Biomarker Characteristics and Implication

SHI Lei; ZONG Wen-ming; SUN Qiu-shi; GAO Xiao-yong; LI Yong-fei; SUN Shou-liang; ZHANG Tao

doi:10.13686/j.cnki.dzyzy.2023.05.004

2023 Vol. 32, No. 5

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Article navigation > Geology and Resources > 2023 > 32(5): 547-554

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SHI Lei, ZONG Wen-ming, SUN Qiu-shi, GAO Xiao-yong, LI Yong-fei, SUN Shou-liang, ZHANG Tao. THE SOURCE ROCKS OF MESOPROTEROZOIC TIELING FORMATION IN LINGYUAN-NINGCHENG BASIN: Biomarker Characteristics and Implication[J]. Geology and Resources, 2023, 32(5): 547-554. doi: 10.13686/j.cnki.dzyzy.2023.05.004

Citation:

SHI Lei, ZONG Wen-ming, SUN Qiu-shi, GAO Xiao-yong, LI Yong-fei, SUN Shou-liang, ZHANG Tao. THE SOURCE ROCKS OF MESOPROTEROZOIC TIELING FORMATION IN LINGYUAN-NINGCHENG BASIN: Biomarker Characteristics and Implication[J]. Geology and Resources, 2023, 32(5): 547-554. doi: 10.13686/j.cnki.dzyzy.2023.05.004

THE SOURCE ROCKS OF MESOPROTEROZOIC TIELING FORMATION IN LINGYUAN-NINGCHENG BASIN: Biomarker Characteristics and Implication

Shenyang Center of China Geological Survey, Shenyang 110034, China

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Corresponding author: SUN Qiu-shi, 70416484@qq.com

Received Date: 02 March 2021

Revised Date: 12 March 2021

Publish Date: 25 October 2023

Abstract

Abstract

Based on gas chromatography and gas chromatography-mass spectrometry, the paper studies the characteristics of biomarker compounds in the source rocks of Tieling Formation in Lingyuan-ningcheng Basin, and analyzes the organic source, sedimentary environment and thermal evolution degree of organic matter, as well as geochemical implication. The saturated hydrocarbon gas chromatography of source rocks is front-peak type unimodal distribution dominated, with the main peak carbon mostly nC₁₈, indicating that the organic matter is mainly derived from lower organism. The Pr/Ph ratio mainly ranges from 0.16 to 0.73, with obviously more phytane, indicating a strongly reducing sedimentary environment. The source rocks of Tieling Formation are characterized by abundant long-side chain tricyclic terpane, high content of gamacerane and dominant distribution of C₂₇ sterane, with Ga/C₃₀H of 0.10-0.31, averagely 0.19, reflecting the source rocks were formed in slight saline water-brackish water environment. The Ts/Tm ratio of 0.54-1.19 (averagely 0.88) shows the thermal evolution degree of source rocks is relatively high. The ratio of sterane/hopane contents is mainly in the range of 0.24-0.59, averagely 0.42, reflecting the lower organism of algae contributes little to organic matter, while the microorganisms such as bacteria contribute a lot. The sterane in the source rocks are L-shape with dominant C₂₇ sterane, indicating the hydrocarbon generating parent material is of lower aquatic biological organism origin.
- biomarker compound /
- source rock /
- Tieling Formation /
- Mesoproterozoic /
- Lingyuan-Ningcheng Basin

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References

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