| 珠江口盆地陆丰凹陷文昌组沉积地球化学特征及古环境意义 |
| |
| 引用本文： | 高阳东,林鹤鸣,汪旭东,邱欣卫,阙晓铭,李敏,赵泽颖,陈艳.珠江口盆地陆丰凹陷文昌组沉积地球化学特征及古环境意义[J].现代地质,2022,36(1):118-129. |
| |
| 作者姓名： | 高阳东 林鹤鸣 汪旭东 邱欣卫 阙晓铭 李敏 赵泽颖 陈艳 |
| |
| 作者单位： | 1. 中海石油(中国) 有限公司 深圳分公司,广东 深圳 5180002. 中国地质大学(北京) 地球科学与资源学院,北京 100083 |
| |
| 基金项目： | 中海石油(中国)有限公司深圳分公司“南海东部油田上产2000万吨关键技术研究”项目(CCL2019SZPS0494) |
| |
| 摘 要： | 陆源营养物质输入是湖泊成油母质(细菌和藻类、浮游植物等)生长的主要外部营养源.古气候条件影响了陆源输入,湖盆水体沉积环境控制了有机质保存,因此沉积期古气候古水体条件对湖相烃源岩有机质丰度预测至关重要.针对珠江口盆地陆丰凹陷文昌组烃源岩进行环境地球化学研究,运用CIA、V/Cr、Mn/Al、Sr/Cu、Ti/Al等多种元...
|
| 关 键 词： | 珠江口盆地 文昌组 沉积地球化学 古环境 烃源岩 |
| 收稿时间： | 2021-02-15 |
| 修稿时间： | 2021-06-18 |
Geochemical Constraints on the Sedimentary Environment of Wenchang Formation in Pearl River Mouth Basin and Its Paleoenvironmental Implications |
| |
| GAO Yangdong,LIN Heming,WANG Xudong,QIU Xinwei,QUE Xiaoming,LI Min,ZHAO Zeying,CHEN Yan.Geochemical Constraints on the Sedimentary Environment of Wenchang Formation in Pearl River Mouth Basin and Its Paleoenvironmental Implications[J].Geoscience——Journal of Graduate School,China University of Geosciences,2022,36(1):118-129. |
| |
| Authors: | GAO Yangdong LIN Heming WANG Xudong QIU Xinwei QUE Xiaoming LI Min ZHAO Zeying CHEN Yan |
| |
| Institution: | 1. CNOOC China Limited, Shenzhen Branch, Shenzhen,Guangdong 518000, China2. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China |
| |
| Abstract: | Terrestrial input is the main external nutrient source for the growth of oil parent matter (e.g.bacteria, algae, phytoplankton) in lacustrine environment. Paleoclimate conditions affect terrigenous input, and lacustrine sedimentary environment controls organic matter preservation. Understanding the paleo-lacustrine environment is critical to predict organic matter abundance in source rocks. Here, we present new geochemical data from source rocks of the Wenchang Formation in the Lufeng Sag of Pearl River Mouth Basin. Element geochemical indices, e.g.CIA, V/Cr, Mn/Al, Sr/Cu and Ti/Al, altogether reveal the climate,lake-level, paleo-oxygen and paleo-salinity conditions and show that the paleo-environment played an important role in controlling the source rocks. High level of chemical weathering corresponds to high organic matter in the lower part of E2w3 and E2w4. Lake-level and paleo-oxygen changes are responsible for the organic matter enrichment of E2w. Meanwhile, the paleo-salinity are less relevant. The organic-rich source rocks of the E2w4 and E2w3 (lower part) of the LF-A well in the Lufeng Sag were likely formed in a deep and reduced lake with strong chemical weathering, under the conditions of warm-humid climate, sufficient nutrient supply, and high productivity. |
| |
| Keywords: | Pearl River Mouth Basin Wenchang Formation sediment geochemistry paleo-environment source rock |
|
| 点击此处可从《现代地质》浏览原始摘要信息 |
| 点击此处可从《现代地质》下载免费的PDF全文 |
|
