渤海海峡地震探测
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摘要
对渤海海峡区域进行了多条多道地震剖面探测。根据区域地质资料和剖面特征,划分6个地震地层单元U1-U6。其中U1为末次冰消期初期和全新世泥质沉积,大约形成于15ka至今。U2为晚更新世地层,大约形成于71ka至末次冰消期初。同时根据区域断裂系统特点,对该区断层分布特点及其稳定性进行分析。该区断层主要为正断层,海峡西侧分布较少,海峡东侧断点密集。除海峡东侧的2号测线中一条断裂断至海底外,其余全部断层均在T2反射界面以下,推测其活动时间为晚更新世晚期之前。
Seismic refelection profiling is applied to the study of Bohai Strait.The stratum underwater is divided into six seismic unit according seismic stratigraphy,where U1is mud deposit during the Holocene and the last deglaciation since 15ka ago and U2is late pleistocene.Based on the previous research of fault system in the Bohai Strain,the authors analysis the distribution characteristics and stability of fault.Profiles reveal that shallow fault system developed mainly before late pleistocene,forming normal fault and graben and horst.In line2afault run through the seafloor and be infered a active fault.The most recent active age of all the other faults was in Holocene acording those fault points in profiles.
Seismic refelection profiling is applied to the study of Bohai Strait.The stratum underwater is divided into six seismic unit according seismic stratigraphy,where U1is mud deposit during the Holocene and the last deglaciation since 15ka ago and U2is late pleistocene.Based on the previous research of fault system in the Bohai Strain,the authors analysis the distribution characteristics and stability of fault.Profiles reveal that shallow fault system developed mainly before late pleistocene,forming normal fault and graben and horst.In line2afault run through the seafloor and be infered a active fault.The most recent active age of all the other faults was in Holocene acording those fault points in profiles.
引文
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[16]李西双,刘保华,华清峰.张家口-蓬莱断裂带渤海段晚第四纪活动特征[J].海洋科学进展,2009,27(3):332-341.
[17]高祥林.渤海中部郯庐断裂带的近期活动与渤海新近纪新生断裂[J].地质科学,2006,41(2):355-364.
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[2]徐杰,宋长青,楚全芝.张家口——蓬莱断裂带地震构造特征的初步探讨[J].地震地质,1998,20(2):146-154.
[3]万桂梅,汤良杰,周心怀,等.郯庐断裂带在渤海海域渤东地区的构造特征[J].石油学报,2009,30(3):342-346.
[4]王国纯.郯庐断裂与渤海海域反转构造及花状构造[J].中国海上油气(地质),1998,12(5):127.
[5]Jian Liu,Yoshiki Saito,Hong Wang,et al.Sedimentary evolution of the Holocene subaqueous clinoform off the Shandong Peninsula in the Yellow Sea[J].Marine Geology,2007,236:165-187.
[6]J Paul Liua,John D Millimanb,Shu Gao,et al.Holocene development of the Yellow River’s subaqueous delta,North Yellow Sea[J].Marine Geology,2004,209:45-67.
[7]夏东兴,刘振夏,王揆洋,等.渤海东部更新世末期以来的沉积环境[J].海洋学报,1995,17(2):86-92.
[8]赵松龄.晚更新世末期中国陆架沙漠化及其衍生沉积的研究[J].海洋与湖沼,1991,22(3):285-293.
[9]李培英.庙岛群岛的晚新生界与环境变迁[J].海洋地质与第四纪地质,1987,7(4):111-121.
[10]李培英.渤海海峡及胶、辽两半岛海岸带黄土的分布特征[J].黄渤海海洋,1992,10(1):25-33.
[11]徐树建,王涛.蓬莱黄土剖面光释光年代学及其沉积特征研究[J].中国沙漠,2011,31(2):295-301.
[12]曹家欣,李培英,石宁.山东庙岛群岛的黄土[J].中国科学,1987,10:1116-1123.
[13]王志才,邓起东,晁洪太,等.山东半岛北部近海海域北西向蓬莱—威海断裂带的声波探测[J].地球物理学报,2006,49(4):1092-1101.
[14]程鹏,高抒,刘敬圃.北黄海西部全新统分布的初步认识[J].第四纪研究,2001,21(4):37.
[15]王淑利.山东半岛东北部近岸海区全新世楔形沉积体沉积作用研究[D].青岛:中国海洋大学,2006.
[16]李西双,刘保华,华清峰.张家口-蓬莱断裂带渤海段晚第四纪活动特征[J].海洋科学进展,2009,27(3):332-341.
[17]高祥林.渤海中部郯庐断裂带的近期活动与渤海新近纪新生断裂[J].地质科学,2006,41(2):355-364.
[18]丁国瑜,卢演俦.华北地区地块新构造变形基本特征的讨论[J].华北地震科学,1983,1(2):1-9.
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