Paleo-Sedimentary Environments in the Dongpu Depression and Their Impact on Organic Matter Abundance
详细信息
- 责任者：Lu Kun (Research Institute of Exploration and Development ; Zhongyuan Oilfield Company ; SINOPEC ; Puyang 457001 ; China) ; Zuo Yinhui
- 刊名：Geology and Prospecting
- 出版年：2013
- 卷期：49(3)
- 关键词：沉积环境 ; sedimentary environment ; 有机质丰度 ; organic material abundance ; 东濮凹陷 ; Dongpu Sag
- 页码：p.589-594
- 图表：illus., 25 refs.
- 分类号：1003
- issnNo：ISSN0495-5331
- isbnNo：CN11-2043/P
摘要
In the Dongpu depression, enormous differences are present in paleo-sedimentary environments and organic matter abundance between its northern and southern parts. This study analyses its paleo-sedimentary environments and organic matter abundance using organic geochemical and microelement methods. The results show that the northern depression is a typical environment of saline water and reduction, while the southern part is an environment of fresh-brachish water and weak oxidation. Paleo-sedimentary environments play a critical role on organic matter abundance. With the higher palaeo-salinity, the reducibility becomes stronger, and the organic matter abundance becomes higher. Based on this, we analyze the reason for the accumulation of the organic matter in the northern Dongpu depression where salt rock developed well and suggest that the aquatic organisms and the strong reducing environment are responsible for the organic matter accumulation.
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