Biomarker distributions and depositional environments of continental source rocks in Sichuan Basin, SW China
| Autor: | Siqin Huang, Guosheng Xu, Fanghao Xu, Wei Wang, Haifeng Yuan, Zhaokun Yan, Xuemei Lin, Menglin Zhang |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Energy Exploration & Exploitation, Vol 38 (2020) |
| Druh dokumentu: | article |
| ISSN: | 0144-5987 2048-4054 01445987 |
| DOI: | 10.1177/0144598720915533 |
| Popis: | In order to study the distributions of the biomarker of the continental source rocks in the Sichuan Basin, 71 source rock samples were collected from the Upper Triassic-Lower Jurassic strata in different regions. The n- alkanes, isoprenoids, terpane, sterane, sesquiterpenes, caranes and aromatics in the extracts were analyzed in detail. GC-MS analysis has been conducted to analyze the biomarker of the continental source rocks. The results of GC-MS analysis indicate that the Upper Triassic source rocks are high in the content of extended tricyclic terpanes, pristane, phytane, gammacerane, C 28 regular sterane and carotene. However, they are low in content of rearranged compounds. The ratio of Pr/Ph is less than 1, with the characteristics of tricyclic terpane C 21 > C 23 . The Lower Jurassic source rocks are extremely low in content (even zero) of extended tricyclic terpanes, pristane, phytane, gammacerane, C 28 regular sterane and carotene, and high in content of rearranged compounds. The ratio of Pr/Ph is more than 1, with tricyclic terpane C 21 > C 23 . These characteristics are still preserved after maturation. Moreover, during the sedimentation of the source rocks of T 3 x 2 –T 3 x 3 members, the supply of continental plants was low (TAR C 29 , 1-MP/9-MP C 29 , 1-MP/9-MP |
| Databáze: | Directory of Open Access Journals |
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