南黄海千里岩断裂附近深部地震反射信号的获取及其地质推测  

NEWLY ACQUIRED DEEP SEISMIC REFLECTION SIGNALS IN THE AREA NEAR THE QIANLIYAN FRACTURE OF THE SOUTH YELLOW SEA AND ITS GEOLOGICAL SIGNIFICANCE

作　　者：吴志强[1,2] 杨艳秋[1,2] 施剑[1,2] 

机构地区：[1]国土资源部海洋油气资源与环境地质重点实验室,青岛266071 [2]青岛海洋地质研究所,青岛266071

出　　处：《海洋地质与第四纪地质》2012年第6期173-178,共6页Marine Geology & Quaternary Geology

基　　金：国土资源部地质调查专项(GZH200800503);国家自然科学基金项目(41174098)

摘　　要：千里岩断裂位于千里岩隆起区的南侧,它是南黄海盆地北部坳陷与千里岩隆起区的边界断层,也是控制南黄海盆地北部坳陷形成与发展的主控断层。由于地震资料的品质影响,对断裂两侧的深部地层属性和分布一直存在疑义。近年来针对深部地层的勘探目标,进行了地震采集和处理技术的研究与试验,在千里岩断裂两侧发现变质岩覆盖下的层状地层,根据地震叠加速度、反射特征分析、重磁震联合反演和区域地质对比,推测为古生代海相碳酸盐岩与碎屑岩地层,与下扬子区古生界特征相当。这一发现对南黄海区域地质特征研究具有重要意义。The Qianliyan fracture,located in the south of the Qianliyan uplift,is the boundary fault between the north depression and the Qianliyan uplift as a major fault controlling the formation and evolution of the north depression of the South Yellow Sea Basin.Due to the poor quality of seismic data,the deep formation attribute and distribution around the fracture have so far remained in argument.With the improvement of seismic acquisition and processing technology aiming at deep exploration target in recent years,we have found layered.Strata under the metamorphic sequence on both sides of the Qianliyan fracture.Based on the seismic stacking velocity,analysis of reflection characteristics,joint inversion of gravity,magnetic and seismic data,as well as regional geological comparison,the layered formation is interpreted as the Paleozoic marine carbonate and clastic deposits similar to the Paleozoic formation in the Lower Yangtze region.The discovery is significant to the further understanding of regional geological characteristics of the South Yellow Sea Basin.

关 键 词：深部地震反射 地质推测 千里岩断裂 

分 类 号：P315.2[天文地球—地震学]