| 东濮凹陷北部沙河街组三段中亚段沉积环境分析 |
| |
| 引用本文： | 李被,刘池洋,黄雷,蒋飞虎,郭佩,鹿坤.东濮凹陷北部沙河街组三段中亚段沉积环境分析[J].现代地质,2018,32(2):227. |
| |
| 作者姓名： | 李被 刘池洋 黄雷 蒋飞虎 郭佩 鹿坤 |
| |
| 作者单位： | (1西北大学 大陆动力学国家重点实验室，陕西 西安710069；2中国石化中原油田分公司 勘探开发科学研究院，河南 濮阳457001) |
| |
| 基金项目： | 国家自然科学基金重点项目(41330315，41602111)；西北大学优秀博士学位论文资助项目(YYB17024)；西北大学大陆动力学国家重点实验室专项课题(201210141)。 |
| |
| 摘 要： | 东濮凹陷北部沙三中亚段广泛发育盐岩和烃源岩，这两个看似不能共存的物质却在这里互层共生。该时期研究区沉积特征为多盐韵律与多层烃源岩互层共生、连续沉积，单个盐韵律厚度从几米到十几米，烃源岩有机质丰度高、类型好。平面上，两者在湖盆沉积沉降中心共生；垂向上，高有机质丰度、好干酪根类型与高盐度地层具有较好的对应关系。因而成为恢复古气候和古环境的重要研究对象。通过岩石学、古生物学以及Sr/Ba、B/Ga、(V+Ni+Mn)、Fe/Mn、Sr/Cu、Mg/Ca、V/(V+Ni)、稀土元素含量和氯同位素等方法对凹陷北部沙三中亚段的沉积环境进行研究。结果表明，凹陷北部沙三中亚段为深水沉积的还原环境，古盐度较高，达到半咸水-咸水沉积；微量元素和孢粉化石特征表明研究区沙三中亚段为温暖潮湿的环境。
|
| 关 键 词： | 东濮凹陷 沙三中亚段 沉积环境 古盐度 古气候 古水深 氧化还原环境 |
Analysis of the Sedimentary Environment in the North of Dongpu Depression During the Deposition of the Middle Section of the Third Member of the Shahejie Formation |
| |
| LI Bei,LIU Chiyang,HUANG Lei,JIANG Feihu,GUO Pei,LU Kun.Analysis of the Sedimentary Environment in the North of Dongpu Depression During the Deposition of the Middle Section of the Third Member of the Shahejie Formation[J].Geoscience——Journal of Graduate School,China University of Geosciences,2018,32(2):227. |
| |
| Authors: | LI Bei LIU Chiyang HUANG Lei JIANG Feihu GUO Pei LU Kun |
| |
| Institution: | (1State Key Laboratory of Continental Dynamics, Northwest University, Xian, Shaanxi710069, China;
2Research Institute of Exploration & Development, Zhongyuan Oilfield Company, SINOPEC,Puyang, Henan457001, China) |
| |
| Abstract: | The salt rocks and source rocks are extensively developed in the middle section of the third Member of Shahejie Formation in the North of Dongpu Depression and the two seemingly coexisting substances are intermixed here. In this period, the sedimentary characteristics of the study area were the continuous deposition of multi salt rhythm and multi layer hydrocarbon source rocks. Individual salt rhythms vary in thickness from a few meters to more than ten meters, the hydrocarbon source rocks have high organic matter abundance and the type is good. In the plane, the two are symbiotic with the sedimentation center of the lake basin, and in the vertical, high organic matter abundance, good kerogen type and high salinity formation have a better correspondence.Therefore, it has become an important research object for the restoration of paleoclimate and paleoenvironment. We studied the sedimentary environment of the middle section of the third Member of Shahejie Formation in the North of Dongpu Depression through petrology, paleontology, and the methods of Sr/Ba,B/Ga,(V+Ni+Mn)，Fe/Mn，Sr/Cu，Mg/Ca，V/(V+Ni),as well as REE content and chlorine isotope. The results showed that the sedimentary environment of the middle section of the third Member of Shahejie Formation in the North of Depression was the reduction environment of the deep water deposition, and the ancient salinity was a little high,which is semi saltwater saltwater deposition. The trace elements and the spore fossils indicate the environment of the middle section of the third Member of Shahejie Formation in the study area was warm and humid. |
| |
| Keywords: | Dongpu depression the middle section of the third Member of Shahejie Formation sedimentary environment paleosalinity paleoclimate paleo water depth redox property |
| 本文献已被 CNKI 等数据库收录！ |
| 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 |
|
