Biomarkers From the Xiayangao Member of the Early Ordovician Tonggao Formation in the Sandu Area, Guizhou Province

Xu Wanhong; Zhang Zhongying; Sheng ping; Meng Qianxiang

Abundant biomarkers( including n-alkanes, acyclic isoprenoid, steranes and terpanes etc. ) have beendetected by GC-MS from the Xiayangao Member of the Early Ordovician Tonggao Formation in the San-du area of the Guizhou Provine. The carbon numbers of n-alkanes range from nC ₁₅ to nC ₃₅ , nC₁₈ as thehighest peak and nC ₂₉ as the second, nC⁺ /nC⁺₂₂ ratios are up to 0. 77 ～ 1. 02, and OEP= 0. 94 ～ 1. 04. Phy-tane is predominant over priatane with a Pr /Ph of 0. 40 ～ 0. 46( average 0. 44) . Hopane series consistmainly of C ₂₇ ～ C ₃₅ -hopanes, a-mong which C ₃₀ -hopane is the most abundant one, and hopane C ₂₇ + C ₂₉ +₃1 . Tricyclic terpanes are only composed of long-chain ones their carbon numbers ranging from C ₂₀ toC ₂₉ , and strong predominance of C₂₃ is detected, Steranes consist mainly of C ₂₇ -sterane, C ₂₃ sterane and C₂₉sterane. According to abundance, C ₂₉ -sterane> C₂₇ -sterane> C₂₈ -sterane, pregnance and 4-methy1 ster-anes are also identified. The composition and distribution of n-alkanes, acyclic isopenoid, terpanes andsteranes, combining with the biota occurring in the same rock samples, seem to show the characteristicsof a reduction environment, and the biomarkers detected from the rock samples might mainly originatefrom algae.

Biomarkers From the Xiayangao Member of the Early Ordovician Tonggao Formation in the Sandu Area, Guizhou Province

1 Department of Earth Sciences,Nanjing University,Nanjing 210093;

2 Lanzhou Institute of Geology,Academia Sinica,Lanzhou 730000

Received Date: 1995-09-25

Publish Date: 1997-09-10

Key words:

biomarkers /
early ordovician /
the Xiayangao member of the Tonggao formation /
the San-du area of Guizhou province

Abstract: Abundant biomarkers( including n-alkanes, acyclic isoprenoid, steranes and terpanes etc. ) have beendetected by GC-MS from the Xiayangao Member of the Early Ordovician Tonggao Formation in the San-du area of the Guizhou Provine. The carbon numbers of n-alkanes range from nC ₁₅ to nC ₃₅ , nC₁₈ as thehighest peak and nC ₂₉ as the second, nC⁺ /nC⁺₂₂ ratios are up to 0. 77 ～ 1. 02, and OEP= 0. 94 ～ 1. 04. Phy-tane is predominant over priatane with a Pr /Ph of 0. 40 ～ 0. 46( average 0. 44) . Hopane series consistmainly of C ₂₇ ～ C ₃₅ -hopanes, a-mong which C ₃₀ -hopane is the most abundant one, and hopane C ₂₇ + C ₂₉ +₃1 . Tricyclic terpanes are only composed of long-chain ones their carbon numbers ranging from C ₂₀ toC ₂₉ , and strong predominance of C₂₃ is detected, Steranes consist mainly of C ₂₇ -sterane, C ₂₃ sterane and C₂₉sterane. According to abundance, C ₂₉ -sterane> C₂₇ -sterane> C₂₈ -sterane, pregnance and 4-methy1 ster-anes are also identified. The composition and distribution of n-alkanes, acyclic isopenoid, terpanes andsteranes, combining with the biota occurring in the same rock samples, seem to show the characteristicsof a reduction environment, and the biomarkers detected from the rock samples might mainly originatefrom algae.

HTML

Reference (15)

[1]	中国科学地球化学研究所,有机地球化学.北京: 科学出版社,1982.
[2]	史继扬,向明菊.五环三萜烷的物源和演化.沉积学报, 1991, 9(增刊 ): 26 ～ 33.
[3]	华阿新,黄第藩,华北中. 上元古界有机质成烃作用及生物标志物特征. 中国科学院兰州地质研究所生物、气体地球化学开放研究实验室研究年报 ( 1988 — 1989). 北京: 科学出版社,761991: 10 ～ 43.
[4]	李任伟,李哲,王志珍,林大兴.分子化石指标在中国东部盆地古环境分析中的应用. 沉积学报, 1988, 6( 4): 108 ～ 118.
[5]	范善发,徐芬芳.沉积岩和原油中的 C ₁₅ - C ₂₀ 类异戊二烯烃的分布与成熟的关系. 有机地球化学论文集. 北京: 科学出版社, 1986: 68 ～ 73.
[6]	宋振亚,陈庸勋.硅藻土有机地球化学特征及其意义. 中国科学院兰州地质研究所生物、气体地球化学开放研究实验室研究年报 ( 1986). 兰州:甘肃科学技术出版社, 1987: 61 ～ 77.
[7]	Fan pu, LiJing gui, Meng Qianxiang, Yu Xinke, li Zhenxi.Biomarkers and Other Hydrocarbons in Upper Sinian Stroma-tolitic Dolostones from Southwest China. In: schidlowski et al. ( Eds): Early Organic Evolution: Implication for Mineral andEnerg y Resources. Springer Varlay. 1992: 228 ～ 239.
[8]	Clark, R. C& Blumer, M., Distribution of n _ paraffins in ma-rine organisms and sediment. Liminology and Oceanog raphy,1967, 12( 12): 79 ～ 87.
[9]	Han J& Calvin M. Hydrocarbon distrbution of alg ae and bacte-riaand microbiological activity in sediments. Nat. Acad. Sci.Proc., 1969, 64: 436 ～ 443.
[10]	黄第藩,李晋超,周翥虹等.陆相有机质和成烃原理. 北京: 石油工业出版社, 1984.
[11]	吴庆余,刘志礼,盛国英等.前寒武纪富藻燧石层中的生物标志化合物. 中国科学院地球化学研究所机地球化学开放研究实验室研究年 ( 1986),贵阳: 贵州人民出版社, 1987: 111 ～ 121.
[12]	史继扬.陆相沉积物和原油中的 β胡萝卜烷和伽马蜡烷. 有机地球化学论文集,北京: 科学出版社, 1986.
[13]	范璞,孟仟祥,程学惠,李景贵.指示沉积古环境的生物标记化合物. 中国科学院兰州地质研究所生、气体地球化学开放研究实验室研究年 ( 1987),兰州: 甘肃科学技术出版社 1988: 48～78.
[14]	宋振亚,陈庸勋,高玲,沈平.硅藻土沉积物、萜类生物标志合物特征. 中国科学院兰州地质研究所生物、气体地球化学开放研究实验室研究年报 ( 1987),兰州: 甘肃科学技术出版社,1988: 228 ～ 239.
[15]	Grantham, P. J., The occurence of unusual C 27 and C 29 Ster-ane predominances in Two Types Omn crude oil. Org. Geoch,1986, 9( 1): 1 ～ 10.

Biomarkers From the Xiayangao Member of the Early Ordovician Tonggao Formation in the Sandu Area, Guizhou Province

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Proportional views

Related