滨海断裂带是南海北部最大的活动断层之一，粤港澳大湾区等沿海地区历史期间的强震几乎都与该断裂相关。深反射地震剖面揭示滨海断裂带穿透整个岩石圈，但与强震活动紧密相关的晚第四纪以来断裂带的活动性质和切穿地层未有清晰的结论，影响对断裂带未来致震风险的认识。本申请在前期高分辨率多道地震和浅地层剖面调查的基础上，选择已获取的、分布在断裂带两侧的沉积钻孔，开展多方法的沉积学特征及沉积体系分析，建立较为完整的断裂带区域晚第四纪以来的沉积序列。基于AMS14C和光释光年龄，获取沉积物记录的地磁极性事件或漂移，重建地球磁场的长期变化，构建钻孔地层千年尺度的时间标尺。最后以地球磁场的变化为锚点，以表示陆源碎屑物质粒度、浓度等变化的环境磁学等参数为指标，以旋回地层学为基本原理，进行断层两侧地层的精细对比，定量确定主断层晚第四纪以来的活动性质，为断层强震危险性判定和强震孕育发生机理的研究提供科学依据。

Active structure mainly dominates the strong intracontinental earthquakes, and Littoral Fault Zone (LFZ) is a main active fault in the north of South China Sea, which influenced the historical earthquakes along the off-shore area of Guangdong, Hongkong and Macao region. The results of a wide-angle onshore–offshore seismic experiments carried out in northern South China Sea, using large volume airgun sources at sea and seismic stations on land, reveal that the LFZ cross the whole crust with a width more than 10 km. However, the latest stratigraphy of LFZ cutting through remains unclear since the late Pleistocene. We select the cored holes distributed along the main fault to analysis the deposition system and construct the stratigraphy sequence based on the results of the high-resolution multichannel seismic profiles and sub-bottom profiles. Constrained by the ages of AMS14C and photoluminescence (OSL), we retrieve the paleomagnetic polarity events or excursions as well as reconstructing the relative intensity and secular variations of the earth magnetic field to correlate and date the sediments in millennial time scale. So, the high-resolution chronology of the stratigraphy since the middle to late Pleistocene can be estimated. As the key tied points using the geomagnetic field variations, the high-frequency cycle sequences can be used to refine the links of the stratigraphy when the environmental parameters and the fraction of hematite and goethite constitute the proxies combined the detrital grain size distribution. After stratigraphy correlation, the active properties of LFZ, such as the displacement of fault and the latest period of fault cutting across the stratigraphy can be achieved.