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.
宗文明, 孙求实, 郜晓勇, 李永飞, 石蕾. 辽西拗陷凌源地区洪水庄组烃源岩生物标志化合物特征及意义[J]. 地质与资源, 2023, 32(3): 311-319.
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. GEOLOGY AND RESOURCES, 2023, 32(3): 311-319.
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