石油与天然气地质 ›› 1985, Vol. 6 ›› Issue (1): 96-103.doi: 10.11743/ogg19850116

• 论文 • 上一篇    下一篇

关于我国东部某些现代沉积物正构烷特征与物质来源的讨论

丁雅秋   

  1. 地质矿产部石油地质综合大队
  • 收稿日期:1982-10-30 出版日期:1985-03-25 发布日期:2012-01-16

ON THE CHARACTERISTICS OF NORMAL ALKANE AND ITS PROVENANCE FROM MODERN SEDIMENTS IN EASTERN CHINA

Ding Yaqiu   

  1. Comprehensive Research Institute of Petroleum Geology, Ministry of Geology and Mineral Resources
  • Received:1982-10-30 Online:1985-03-25 Published:2012-01-16

摘要:

自从 E.E.Bray 和 E.D.Evans(1961)发现近代沉积物中正构烷烃具有奇碳优势,而在成熟生油岩和原油中这种优势趋于消失这一特点之后,奇碳优势的消失被普遍地认为是生油岩业已成熟的重要标志之一。但七十年代以来,我们发现我国东部现代沉积物中不仅存在高碳数奇碳优势正烷烃,也存在偶碳优势正烷烃。

Abstract:

Comprehensive study is made on saturated hydrocarbon for 80 samples col-lected from modern sediments and organisms in seas,lakes,deltas and rivers in eastern China.The n-alkane from modern sediments of semi-arid climatic zones(from Song-liao Basin to the Yellow Sea)in north China is mainly represented by a single peak with an odd-even predominance and a high-carbon major peak.This distribution pattern is similar to that of the n-alkane of Artemisia from modern organism in Songliao Basin,implying that the organic matters were derived from continental plants.The distribution pattern of n-alkane in modern sediments of the semi-humid climatic zone(along the middle to lower reaches of the Yangtzi River and the East China Sea paralic area)in south China is quite complicated,and represented by single or bimodal peak,partly with even carbon predominance.The modern sediments with normal alkane characterized by even carbon predominance werenot deposited in a strongly reduced environment,and microorganism remoulding might play an important part in the formation of even carbon predominance.