| Biomarkers reveal the terrigenous organic matter enrichment in the late Oligocene-early Miocene marine shales in the Ying-Qiong Basin,South China Sea |
| |
| 作者姓名： | Wenjing Ding Youchuan Li Lan Lei Li Li Shuchun Yang Yongcai Yang Dujie Hou |
| |
| 作者单位： | 1. China National Offshors Oil Corporation (CNOOC) Research Institute Co., Ltd.;2. School of Natural Sciences, Macquarie University;3. School of Energy Resources, China University of Geosciences;4. CNOOC International Limited |
| |
| 基金项目： | The National Natural Science Foundation of China under contract No. 42202184；;the National Science and Technology Major Project under contract No. 2016ZX05026； |
| |
| 摘 要： | The increase of total organic carbon content of the late Oligocene-early Miocene terrigenously-dominated marine shales in the shallower depth intervals was reported in the Ying-Qiong Basin, South China Sea. The organic enriched lower Sanya Formation shales(early Miocene) have biomarker characteristics of tropical/subtropical plants, with abundant high molecular weight n-alkanes, angiosperm-derived oleanane,rearranged oleananes Ⅰ, Ⅱ, Ⅱ, tricyclic/tetracyclic terpanes including des-A-oleanane, X, ...
|
Biomarkers reveal the terrigenous organic matter enrichment in the late Oligocene?early Miocene marine shales in the Ying-Qiong Basin,South China Sea |
| |
| Wenjing Ding,Youchuan Li,Lan Lei,Li Li,Shuchun Yang,Yongcai Yang,Dujie Hou.Biomarkers reveal the terrigenous organic matter enrichment in the late Oligocene-early Miocene marine shales in the Ying-Qiong Basin,South China Sea[J].Acta Oceanologica Sinica,2023,42(3):31-53. |
| |
| Authors: | Wenjing Ding Youchuan Li Lan Lei Li Li Shuchun Yang Yongcai Yang Dujie Hou |
| |
| Institution: | 1.China National Offshors Oil Corporation (CNOOC) Research Institute Co., Ltd., Beijing 100028, China2.School of Natural Sciences, Macquarie University, Sydney 2109, Australia3.School of Energy Resources, China University of Geosciences, Beijing 100083, China4.CNOOC International Limited, Beijing 100028, China |
| |
| Abstract: | The increase of total organic carbon content of the late Oligocene?early Miocene terrigenously-dominated marine shales in the shallower depth intervals was reported in the Ying-Qiong Basin, South China Sea. The organic enriched lower Sanya Formation shales (early Miocene) have biomarker characteristics of tropical/subtropical plants, with abundant high molecular weight n-alkanes, angiosperm-derived oleanane, rearranged oleananes I, II, II, tricyclic/tetracyclic terpanes including des-A-oleanane, X, *, Y, Z, Z1 and bicadinanes W, T, T1, R. The biomarker characteristics are suggestive of larger influx of the dominant tropical/subtropical angiosperms in flora under a warming and more humid climate during depositions of the lower Sanya Formation (early Miocene) than the older Lingshui Formation (late Oligocene). The tropical/subtropical angiosperm input was thought as the prime control of terrigenous organic matter enrichment relative to the redox condition, and the coeval sea level changes and seafloor spreading in the South China Sea. Enrichment of the terrigenous organic matter in the early Miocene shales is likely in association with the coeval peak East Asian summer monsoon intensity in the South China Sea. |
| |
| Keywords: | total organic carbon higher plant-derived biomarkers tropical/subtropical plants East Asian monsoonal climate |
|
| 点击此处可从《海洋学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《海洋学报(英文版)》下载免费的PDF全文 |
|
