中新世以来上印度扇水道-堤岸体系几何学特征及演化  

Geometric characteristics and evolution of channel-levee system in Upper India Fan since the Miocene

作　　者：李章鹏 梁杰[1,2,3] 李森 陈建文 廖晶[2,3] 龚建明 张银国 王建强[2,3] 杨艳秋 杨传胜[2,3] 雷宝华 LI Zhangpeng;LIANG Jie;LI Sen;CHEN Jianwen;LIAO Jing;GONG Jianming;ZHANG Yinguo;WANG Jianqiang;YANG Yanqiu;YANG Chuansheng;LEI Baohua(College of Marine Geosciences,Ocean University of China,Qingdao 266100,China;Qingdao Institute of Marine Geology,China Geological Survey,Qingdao 266237,China;Laboratory for Marine Mineral Resources,Laoshan Laboratory,Qingdao 266237,China)

机构地区：[1]中国海洋大学海洋地球科学学院,青岛266100 [2]中国地质调查局青岛海洋地质研究所,青岛266237 [3]崂山实验室海洋矿产资源评价与探测技术功能实验室,青岛266237

出　　处：《海洋地质与第四纪地质》2024年第1期30-43,共14页Marine Geology & Quaternary Geology

基　　金：崂山实验室科技创新项目(LSKJ202203401、LSKJ202203404);国家海洋专项项目(DD20160215、DD20191003、DD20191032、DD20190581、DD20211353、DD20221723、DD20230317);国家自然科学基金面上项目“马克兰增生楔低角度俯冲区断层‘接力’过程及其对水合物成藏的控制”(42076069)。

摘　　要：以中新世以来上印度扇水道-堤岸体系为研究对象,利用高精度二维地震资料开展地震精细解释与几何学分析,刻画水道-堤岸体系几何学特征及时空演化过程,探讨中新世以来上印度扇发育演化主要期次及特征。结果表明,中新世以来上印度扇水道-堤岸体系可划分为中新世、上新世及更新世至今三大期次,整体表现出“单期水道-侧向迁移-扁长型”到“多期水道-垂向叠置-厚窄型”的演化特征。深入探讨中新世以来上印度扇水道-堤岸体系的几何学特征及演化可为重力流水道的沉积构型样式研究提供新的例证,并为深海油气勘探开发提供参考。Taking the Miocene Upper Indian fan channel-levee system as the research object,we used high-precision two-dimensional seismic data to carry out seismic fine interpretation and geometric analysis,depicted the geometric characteristics of the channel-levee system and the spatio-temporal evolution process,and discussed the main stages and characteristics of the development and evolution of the Miocene Upper Indian fan.Results show that the Miocene Upper India fan channel-levee system can be divided into three developmental phases:the Miocene,the Pliocene,and the Pleistocene to present.The channel-levee system evolved from“single-phase channel–lateral migration–flat type”to“multi-phase channel–vertical stacking–thick-narrow type”.An in-depth discussion of the geometric characteristics and evolution of channellevee system in Upper India Fan since the Miocene can provide new examples for the study of the sedimentary architecture of gravity flow channels,and provide reference for deep-sea oil and gas exploration and development.

关 键 词：深水沉积 水道-堤岸体系 中新世 上印度扇 

分 类 号：P736.21[天文地球—海洋地质]