Identification of C19C29 Steranes and 25norhopanes in Source Rock and Geological Significance
- Received Date: 1900-01-01
- Rev Recd Date: 1900-01-01
- Publish Date: 2009-02-10
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Key words:
- Santanghu Basin /
- source rock /
- C19~C29 steranes /
- 25norhopanes /
- biodegradation
Abstract: Sterane series compounds such as C21，C22 and C27~C29 can be usually detected in sediments, however, C19,C20,C23~C26 steranes rarely occur in above geologic body. The C19~C29 sterane series and C26~C29 25norhopanes are detected of high abundance in blackshale sample from Lucaogou Fomation, Santanghu Basin. Such abundant compounds contain much information in oilgas geochemistry research, but until now, few research works have been carried out in the world. Based on our detail studies, a conclusion has been reached that the two series compounds can indicate arid and salinelake environment, and the low hydrobiont of algae and plankton are well developed. The organic matters in sediments suffer severe biodegradation, and then the products of biodegradation and the original organic matter are preserved well and become into the precursor of hydrocarbons.
| Citation: | WANG Zuodong. Identification of C19C29 Steranes and 25norhopanes in Source Rock and Geological Significance[J]. Acta Sedimentologica Sinica, 2009, 27(1): 180-185.
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