Geochemical characteristics and organic matter enrichment of the lower cretaceous dolomite-rich interval in the Bayindulan sag, Erlian basin, northern China
文献类型：期刊论文
| 作者 | He, Fugui3,4; Tian, Hui3,4; Gai, Haifeng3,4; Liu, Wei1; Qian, Zheng2; Jiang, Tao2; Han, Qi2; Fan, Jie2; Zhang, Jie2; Yang, Xiaoxiao2 |
| 刊名 | GEOENERGY SCIENCE AND ENGINEERING
 |
| 出版日期 | 2023-09-01 |
| 卷号 | 228页码:20 |
| 关键词 | Dolomite-rich interval Source rock Exhalative hydrothermal event Organic matter enrichment |
| ISSN号 | 2949-8929 |
| DOI | 10.1016/j.geoen.2023.211970 |
| 英文摘要 | A dolomite-rich interval was found in the Lower Cretaceous, Bayindulan Sag. Based on organic and inorganic geochemical data, the hydrocarbon source rock potential of this dolomite-rich interval and the factors that control organic matter enrichment were investigated. This dolomite-rich interval has TOC values ranging from 0.54% to 9.64% (average = 3.51%) and HI values varying from 263 to 974 mg HC/g TOC, suggesting good to excellent source rocks whose organic matter is dominated by type I/II1 kerogens. The dominance of short-chain and medium-chain n-alkanes (n-C16 to n-C23) in the n-alkane distribution of the extracted organic matters in the dolomite-rich interval implies that the planktonic organic matters acted as the dominant inputs for the dolomiterich interval, with a minor contribution from higher plants. The low Pr/Ph values suggest a strongly reducing environment favoring the preservation of organic matters. The high amount of gammacerane indicates water stratification during deposition time, which also helps to maintain the strongly reducing conditions in the bottom water. Meanwhile, REE and trace elements indicate that the dolomite-rich interval is closely related to the exhalative hydrothermal events, and the upwelling hydrothermal fluids provided abundant nutrients into lake water, resulting in the bloom of aquatic organisms. Overall, the strongly reducing depositional environments, the strong stratified-waterbody and the hydrothermal fluids jointly control the organic matter enrichment in the dolomitic interval. |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001056012700001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74737]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Tian, Hui |
| 作者单位 | 1.Qiannan Normal Univ Nationalities, Duyun 558000, Guizhou, Peoples R China 2.PetroChina, Huabei Oilfield Branch Co, Explorat & Dev Inst, Renqiu 062550, Hebei, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 4.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Fugui,Tian, Hui,Gai, Haifeng,et al. Geochemical characteristics and organic matter enrichment of the lower cretaceous dolomite-rich interval in the Bayindulan sag, Erlian basin, northern China[J]. GEOENERGY SCIENCE AND ENGINEERING,2023,228:20. |
| APA | He, Fugui.,Tian, Hui.,Gai, Haifeng.,Liu, Wei.,Qian, Zheng.,...&Zhang, Ao.(2023).Geochemical characteristics and organic matter enrichment of the lower cretaceous dolomite-rich interval in the Bayindulan sag, Erlian basin, northern China.GEOENERGY SCIENCE AND ENGINEERING,228,20. |
| MLA | He, Fugui,et al."Geochemical characteristics and organic matter enrichment of the lower cretaceous dolomite-rich interval in the Bayindulan sag, Erlian basin, northern China".GEOENERGY SCIENCE AND ENGINEERING 228(2023):20. |
入库方式： OAI收割
来源：广州地球化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。