珠江口盆地白云凹陷海底峡谷沉积模式

被引:8
作者
吴嘉鹏 [1 ,2 ]
王英民 [1 ,2 ]
徐强 [3 ]
机构
[1] 中国石油大学(北京)地球科学学院
[2] 中国石油大学(北京)油气资源与探测国家重点实验室
[3] 中国海洋石油研究总院
关键词
海底峡谷; 地貌; 地震相; 沉积模式; 白云凹陷;
D O I
10.16028/j.1009-2722.2011.08.003
中图分类号
P618.13 [石油、天然气];
学科分类号
070403 [天体物理学];
摘要
利用高分辨率三维地震资料,在珠江口白云凹陷三维工区中发现形态以及发育特征相似的7个海底峡谷。通过对其现今地貌特征研究,将其分为上、中、下段。综合地震反射振幅、连续性及外部结构形态等信息,识别出了峡谷侵蚀基底、谷底沉积、谷壁滑塌等峡谷地震相单元。结合峡谷不同位置处的各类地震相的发育情况,可知峡谷的这3个地貌单元具有不同的沉积特点,分别为上部侵蚀下切段、中部侵蚀—沉积段以及下部沉积充填段。最终提出了白云凹陷海底峡谷的沉积模式。
引用
收藏
页码:26 / 31
页数:6
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