| 引用本文: | 李昱霏,冯湘子,朱友生,杨兰,赵乐,齐明柱,王微微,王大伟.琼东南外陆架灾害地质特征分布规律及成因分析[J].海洋科学,2025,49(2):34-46. |
| |
|
| |
|
|
| 本文已被：浏览 278次 下载 313次 |
码上扫一扫！ |
|
|
| 琼东南外陆架灾害地质特征分布规律及成因分析 |
|
李昱霏1, 冯湘子1, 朱友生1, 杨兰1, 赵乐2, 齐明柱3, 王微微4, 王大伟5,6
|
|
1.中海油田服务股份有限公司物探事业部, 天津 300459;2.深圳大学 深地科学与绿色能源研究院, 广东 深圳 518060;3.深圳市勘察测绘院(集团)有限公司, 广东 深圳 518028;4.海南大学 电子科学与技术学院, 海南 海口 570228;5.中国科学院深海科学与工程研究所, 海南 三亚 572000;6.南方海洋科学与工程广东省实验室(珠海), 广东 珠海 519082
|
|
| 摘要: |
| 琼东南盆地外陆架发育多种类型的灾害地质特征,本文利用船载调查数据、水下自主航行器(AUV)调查数据和三维地震数据,首次对研究区水深100~250 m范围内发育的灾害地质特征进行了多维度的精细刻画,并分析了成因和控制因素。经过研究,将研究区内的灾害分为海底灾害因素和浅层灾害因素两大类。海底灾害因素包括海底凸起、海底麻坑、残留古海岸、海底陡坎和沙波;浅层灾害地质因素包括活动断层和埋藏古河道。经过分析,提出了琼东南盆地陆架区灾害地质特征的分布规律和控制因素,认为琼东南盆地外陆架灾害地质因素主要受海平面变化、构造作用和沉积物供给因素控制:残留古海岸、沙波、海底陡坎和埋藏古河道等多与海平面变化相关,而活动断层、海底凸起、海底麻坑等多受到区域构造作用控制;受沉积物供给量的影响,研究区东部多发育以碳酸盐型古海岸及碳酸盐台地为主的海岸带特征,西部更倾向于发育沙波、埋藏古河道等与陆源碎屑相关的特征类型。本研究不仅有助于系统性认识琼东南盆地陆架的灾害地质特征分布规律,也为未来琼东南盆地油气田持续开发具有指导意义。 |
| 关键词: 琼东南外陆架 灾害地质特征 分布规律 成因分析 |
| DOI：10.11759/hykx20240903002 |
| 分类号:P736.1 |
| 基金项目:深圳市科技重大专项项目(KJZD20231025152759002) |
|
| Analysis of the distribution pattern and cause of geological disaster characteristics on outer continental shelf of the Qiongdongnan Basin |
|
LI Yufei1, FENG Xiangzi1, ZHU Yousheng1, YANG Lan1, ZHAO Le2, QI Mingzhu3, WANG Weiwei4, WANG Dawei5,6
|
|
1.COSL Geophysical, China Oilfield Services Ltd, Tianjin 300459, China;2.Institute of Deep Earth Science and Green Energy, Shenzhen University, Shenzhen 518060, China;3.Shenzhen Institute of Surveying and Mapping (Group) Co., LTD., Shenzhen 518028, China;4.College of Electronic Science and Technology, Hainan University, Haikou 570228, China;5.Institute of Deep Sea Science and Engineering, Chinese Academy of Sciences, Sanya 572000, China;6.Guangdong Laboratory of Southern Marine Science and Engineering (Zhuhai), Zhuhai 519082, China
|
| Abstract: |
| A variety of geological disaster features are developed at outer continental shelf of the Qiongdongnan Basin. Based on the shipborne survey data, AUV(Autonomous Underwater Vehicle) survey data, and 3D seismic data, this study precisely characterizes the geological disaster features within the water depth range of 100–250 m in the study area and analyzes their causes and controlling factors. After the analysis, the disasters in the study area are classified into two major categories, namely, submarine disaster factors and shallow geological disaster factors. Among them, submarine disaster factors include submarine bulges, submarine pockmarks, ancient coasts, submarine scarps, and sand waves, shallow geological disaster factors include active faults and shallow buried channels. The results of the analysis show that the geological disaster factors at outer continental shelf of the Qiongdongnan Basin are mainly controlled by sea level changes, tectonic activities, and sediment supply factors. Residual ancient coasts, sand waves, submarine scarps, and shallow buried channels are mostly related to sea level changes, whereas active faults, submarine bulges, and submarine pockmarks are mostly controlled by regional tectonic activities. Affected by the sediment supplies, the eastern part of the study area is more prone to develop coastal features dominated by carbonate coasts and carbonate platforms, whereas the western part is more likely to develop features related to terrigenous sediments, such as sand waves and shallow buried channels. |
| Key words: outer continental shelf of the Qiongdongnan Basin geological disaster features distribution pattern cause analysis |
|
|
|
|
|
|