南黄海盆地和北黄海盆地地震速度分析

在概述南黄海盆地和北黄海盆地区域地质背景的基础上,介绍了横跨2个盆地的HHQY05-1测线的位置和地层属性。通过对2个盆地(主要是HHQY05-1测线)的速度谱、平均速度以及层速度的分析对比,认为2个盆地的地震速度差别较大,南黄海盆地的平均速度总体上小于北黄海盆地的速度,主要是由于2个盆地在地质构造、岩性、地质年代等方面的差异所引起。因此,利用地震速度可以初步了解盆地的构造特征和地质属性。

A PRELIMINARY ANALYSIS OF THE SEISMIC VELOCITY IN THE SOUTH YELLOW SEA BASIN AND THE NORTH YELLOW SEA BASIN

Based on the regional geological background of the South Yellow Sea Basin and the North Yellow Sea Basin, this paper describes the location and stratigraphic attribute of Line HHQY05-1 that stretches across the two basins. The authors comparatively analyzed velocity spectra, average velocity and interval velocity of the two basins, and reached the conclusion that the seismic velocities of them are quite different, and the average seismic velocity of the South Yellow Sea Basin was lower than that of the North Yellow Sea Basin, which is attributed to the differences in their geological structures, lithologic characters and geochronologic units. Therefore, the tectonic characteristics and geological attributes of the basin can be roughly detected by using the seismic velocity.