Characteristics and geologic significance of seismites in the Lower Cretaceous Laiyang Formation in northeastern Jiaolai Basin in Shandong Province
Zhou Yong1, Ji Youliang1, Wan Lu2, Pan Chunfu1
1 College of Geosciences， China University of Petroleum(Beijing)，Beijing102249 2 Geophysical Research Institute，Bureau of Geophysical Prospecting，PetroChina，Zhuozhou072751，Hebei
Abstract：The Jiaolai Basin is a Mesozoic residual basin.The southern and northeastern parts of the basin were intensively affected by Tanlu and Mou-Ji Faults in the Cretaceous，and several types of deformational structures that are interpreted as seismites were formed.Based on core and outcrop observation，two types of sedimentary structures formed by seismic events were observed，including deformation structures of soft-sediments(liquefied deformation structure，stretch deformation structure，stress deformation structure)and hard rock.These sedimentary structures can be subdivided into 9 subclasses，and their genetic mechanisms were analyzed.The Mou-Ji Fault is a main fault which controlled the formation of the Jiaolai Basin，and stretched with NW-SE direction in Laiyang Formation depositional period，which caused frequent earthquake in the northeastern Jiaolai Basin.As a result，seismites were formed and were dominated by liquefied deformation of soft-sediments，which demonstrated the earthquake intensity was 5<Ms<8.A large number of micro-fractures in rocks were formed due to the earthquake，and the pores were connected by micro-fractures，which finally increased the permeability of rocks.The trigger mechanism of turbidite of the Shuinan Member can be explained as earthquake according to the discovery of seismites.Seismo-turbidites can be preserved as diagenetic traps because of dissolution caused by organic acids，which provides a new perspective and field for oil and gas exploration.
Zhou Yong,Ji Youliang,Wan Lu et al. Characteristics and geologic significance of seismites in the Lower Cretaceous Laiyang Formation in northeastern Jiaolai Basin in Shandong Province[J]. JOPC, 2011, 13(5): 517-528.
陈世悦，袁文芳，鄢继华.2003.济阳坳陷早第三纪震积岩的发现及其意义［J］.地质科学，38(3):377-384. 戴俊生，陆克政，宋全友，等.1995.胶莱盆地的运动学特征［J］.石油大学学报(自然科学版)，19(2):1-6. 杜远生，张传恒，韩欣.2001.滇西中元古代昆阳群的地震事件沉积及其地质意义［J］.中国科学(D辑)，31(4):284-290. 段吉业，刘鹏举，万彪华.2002.北燕山中—新元古代震积岩系列及其地震节律［J］.地质学报，76(4):441-445. 冯先岳.1989.地震震动液化形变的研究［J］.内陆地震，3(4):299-307. 郭建华，王方平，刘贵，等.1999.湘西大庸上震旦统灯影组震裂角砾岩［J］.石油实验地质，21(3):219-224. 陆克政，戴俊生.1994.胶莱盆地的形成和演化［M］.山东东营:石油大学出版社，1-174. 彭阳，杨天南，乔秀夫，等.2001.大连上震旦统地震灾变事件研究［J］.地质学报，75(2):221-227. 乔秀夫.2002.中朝板块元古宙板内地震带与盆地格局［J］.地学前缘，9(3):141-149. 乔秀夫，高林志.1999.华北中新元古代及早古生代地震灾变事件及与Rodinia的关系［J］.科学通报，44(16):1753-1758. 乔秀夫，高林志.2007.燕辽裂陷槽中元古代古地震与古地理［J］.古地理学报，9(4):337-352. 乔秀夫，李海兵.2008.枕、球—枕构造:地层中的古地震记录［J］.地质论评，54(6):721-731. 乔秀夫，李海兵.2009.沉积物的地震及古地震效应［J］.古地理学报，11(6):593-610. 乔秀夫，高林志，彭阳，等.2001.古郯庐带沧浪铺阶地震事件、层序及构造意义［J］.中国科学(D辑)，31(11):911-918. 乔秀夫，李海兵，高林志.1997.华北地台震旦纪—早古生代地震节律［J］.地学前缘，4(3-4): 155-160. 乔秀夫，李海兵，王思恩，等.2008.新疆境内塔拉斯—费尔干纳断裂早侏罗世走滑的古地震证据［J］.地质学报，82(6):721-730. 乔秀夫，宋天锐，高林志，等.1994.碳酸盐岩振动液化地震序列［J］.地质学报，68(1):16-34. 石亚军，陈武杰，曹正林，等.2009.柴达木盆地西南区震积岩的发现及其引发的勘探启迪［J］.地质学报，83(8):1178-1187. 宋天锐.1988.北京十三陵前寒武纪碳酸盐岩地层中的一套可能的地震—海啸序列［J］.科学通报，38(8):609-611. 唐凤华，程日辉，王璞君，等.2006.走滑拉分盆地层序构成特征——以胶莱盆地莱阳群为例［J］.沉积与特提斯地质，26(3):31-36. 田洪水，万中杰，王华林.2003.鲁中寒武系馒头组震积岩的发现及初步研究［J］.地质论评，49(2): 121-131. 魏垂高，张世奇，姜在兴，等.2007.塔里木盆地志留系震积岩特征及其意义［J］.地质学报，81(6):827-833. 鄢继华，陈世悦，姜在兴，等.2007.断陷湖盆震浊积岩成因模拟实验［J］.古地理学报，9(3):277-282. 鄢继华，崔永北，陈世悦.2009.几种常见震积岩相标志在模拟实验中的识别［J］.沉积学报，27(6):1131-1137. 杨剑萍，王辉，陈世悦，等.2004.济阳坳陷古近系震积岩特征［J］.沉积学报，22(2):281-287. 杨剑萍，聂玲玲，张琳，等.2008.柴达木盆地西南缘乌南油田新近系古地震纪录及储集性能研究［J］.地质学报，82(6):805-813. 杨天南，陈文，李锦轶，等.2002.苏鲁超高压变质地块的回返历史——苏鲁超高压带北界的构造变形与时限［J］.地质论评，48(增刊):176-182. 殷秀兰，杨天南.2005.胶州—莱阳盆地白垩纪莱阳群中的震积岩及其构造意义讨论［J］.地质论评，51(5):503-506. 袁静.2004.山东惠民凹陷古近纪震积岩特征及其地质意义［J］.沉积学报，22(1):41-46. 翟慎德.2003.胶莱盆地莱阳凹陷构造特征及演化［J］.石油实验地质，25(2):137-142. 张琴，朱筱敏，张建军，等.2003.酒西盆地青南凹陷柳沟庄—窟窿山地区下白垩统震积岩的发现及意义［J］.地质学报，77(2):158-162. Anketell J M，Cegla J，Dzulynski S.1970.On the deformational structures in systems with reversed density gradients［J］.Ann.Soc.Geol.Polon.，40：3-30. Knaust D.2002.Pinch-and-swell structures at the Middle-Upper Muschelkalk boundary(Triassic): Evidence of earthquake effects(seismites)in the Germanic Basin［J］.International Journal of Earth Sciences，91(2):291-303. Plaziat J C，Purser B，Philobbos E.1988.Diversity of Neogene seismites of the northwest Red Sea(Egypt): A characteristic sedimentary expression of rifting［J］.Tectonophysics，153:295. Rodriguez-Pascua M A，Calvo J P，Vicente G D， et al.2000.Soft-sediment deformation structures interpreted as seismites in lacustrine sediments of the Prebetic，SE Spain，and their potential use as indicators of earthquake magnitudes during the Late Miocene［J］.Sedimentary Geology，135(1-4):117-135.
