CHARACTERISTICS AND SIGNIFICANCE OF BIOMARKER COMPOUNDS IN SOURCE ROCKS OF HONGSHUIZHUANG FORMATION IN LINGYUAN AREA, WESTERN LIAONING DEPRESSION

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

doi:10.13686/j.cnki.dzyzy.2023.03.007

2023 Vol. 32, No. 3

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Article navigation > Geology and Resources > 2023 > 32(3): 311-319

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ZONG Wen-ming, SUN Qiu-shi, GAO Xiao-yong, LI Yong-fei, SHI Lei. CHARACTERISTICS AND SIGNIFICANCE OF BIOMARKER COMPOUNDS IN SOURCE ROCKS OF HONGSHUIZHUANG FORMATION IN LINGYUAN AREA, WESTERN LIAONING DEPRESSION[J]. Geology and Resources, 2023, 32(3): 311-319. doi: 10.13686/j.cnki.dzyzy.2023.03.007

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ZONG Wen-ming, SUN Qiu-shi, GAO Xiao-yong, LI Yong-fei, SHI Lei. CHARACTERISTICS AND SIGNIFICANCE OF BIOMARKER COMPOUNDS IN SOURCE ROCKS OF HONGSHUIZHUANG FORMATION IN LINGYUAN AREA, WESTERN LIAONING DEPRESSION[J]. Geology and Resources, 2023, 32(3): 311-319. doi: 10.13686/j.cnki.dzyzy.2023.03.007

CHARACTERISTICS AND SIGNIFICANCE OF BIOMARKER COMPOUNDS IN SOURCE ROCKS OF HONGSHUIZHUANG FORMATION IN LINGYUAN AREA, WESTERN LIAONING DEPRESSION

Shenyang Center of China Geological Survey, Shenyang 110034, China

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

Received Date: 16 March 2021

Revised Date: 05 July 2022

Publish Date: 25 June 2023

Abstract

Abstract

Gas chromatography(GC) and gas chromatography-mass spectrometry(GC-MS) are used to analyze the organic matter sources, sedimentary environment and thermal evolution degree of source rocks. The results show that the distribution of n-alkanes(m/z85) of source rocks from Hongshuizhuang Formation is dominated by front peak type unimodel. The main peak carbon is mostly nC₁₈, indicating the organic source is mainly lower organism. The tricyclic terpenes show a normal distribution with C₂₀ or C₂₃ as the main peak, and the ratio of C₂₄-tetracyclic diterpenes/C₂₆ tricyclic terpenes is 0.35-1.38, averagely 0.65, indicating that there is input of lower organism in Hongshuizhuang Formation. The steranes show the dominant C₂₇ sterane L-shape distribution, suggesting that the source of hydrocarbon generation material be lower aquatic organism. The Pr/Ph ratio is 0.16-0.85, with obvious phytane predominance, indicating a strong reducing environment and partially reducing environment. The gammacerane index(Ga/C₃₀H) is 0.06-0.66, averagely 0.21, reflecting the source rocks were formed in brackish water environment. The Sterane C₂₉-αββ/(αββ+ααα) is 0.26-0.46, averagely 0.42, showing the source rocks are mostly in the mature stage.
- Hongshuizhuang Formation /
- source rock /
- biomarker compound /
- Western Liaoning depression

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References

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