狮子洋断裂带第四系沉积规律研究

Study on Sedimentary Law of Quaternary in Shiziyang Fault Zone

为了了解狮子洋断裂第四纪地层的划分情况,通过在断裂带区域进行浅层地震勘探和水上钻探,钻取岩芯、开展沉积相划分和采集系列的年代学样品,采用14C测年、粗颗粒石英或细颗粒石英的OSL测年两种方法,对钻孔岩芯的绝对年龄进行测定,研究狮子洋断裂带第四系的沉积规律。结果表明,深圳地区水域第四系为中更新世、晚更新世和全新世沉积,并且新获得的沉积最老年龄为18.5万年,约18万年以来地层年代学框架为深圳地区活动断层探测提供了时间标尺。

In order to understand the division of the Shiziyang fault Quaternary strata,through shallow seismic exploration and water drilling in the fault zone area,core drilling,sedimentary facies division and collection of series of chronological samples,14C dating,two methods of OSL dating of coarse-grained quartz or fine-grained quartz are used to determine the absolute age of drill cores and to study the sedimentary laws of the Quaternary in the Shiziyang fault zone.The results show that the Quaternary in the waters of the Shenzhen area belonged to the Middle Pleistocene,Late Pleistocene and Holocene sediments,and the oldest newly obtained sedimentary age was 185000 years.The stratigraphic chronology framework for the Shenzhen area since about 180000 years Fault detection provides a time scale.