南海北部中更新世晚期以来古海岸变迁及其地质意义

Ancient coastline transfer since late middle-Pleistocene in northern South China Sea and its geological significance

本文在研究南海北部陆架区ZQ2和ZQ4钻孔资料的基础上,对该区单道地震资料进行地震层序划分、地震-沉积相解释分析。根据钻孔地层、地震反射和海底地貌特征,对中更新世晚期、末次盛冰期以及冰后期这三个时期的古海岸位置进行了分析,并探讨了该区中更新世晚期以来的古海岸变迁,对进一步指导该区的第四纪环境研究具有重大意义。

three different period ancient coastlines are recognized base on borehole analyses and seismic sequences dividing, seismic-deposition facies analysis of the single channel seismic profile, as well as stratum unconformity, sea bottom morphology in the northern South China Sea. These three ancient coastlines were belong to the late middle-Pleistocene period, the Last Glacial Maximum period as well as after-Last glacial period separately. We also discuss the transfer mechanism of the ancient coastline according to the research result