济阳坳陷东北部埕东断层构造特征及演化过程
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摘要
埕东断层是济阳坳陷东北部一条重要的控盆断裂.通过精细解译济阳坳陷埕东地区三维地震资料,并结合相干分析技术,对埕东断层的构造特征、断层性质、演化过程及其形成机制进行了深入研究.结果表明,埕东断层为一条特征明显的走滑断层,据其构造特征可将埕东断层分为南段(F1)和北段(F2)两部分.南段(F1)为埕东断层的主体,表现出明显的"海豚效应";F2断层由一组走向北东、倾向南东的左阶羽状雁列带组成.埕东断裂的演化历史可划分为Ek-Es4期、Es3-Es2下期、Es2上-Ed期和Ng-Nm期4个时期.不同时期的区域构造环境,控制着埕东断层的形成及演化过程.
Chengdong fault in the northeast of Jiyang depression is an important basin-controlling fault.Based on the fine interpretation of 3D seismic data of Chengdong area in Jiyang depression,and combined with correlation analysis technology,the structural characteristics as well as fault nature,evolution process and its formation mechanism were analyzed.The research results show that Chengdong fault is a characteristic strike-slip fault.According to the structural characteristics,Chengdong fault can be divided into two parts,the south section(F1) and north section(F2).F1 fault manifested "dolphin effect" is the main body of Chengdong fault.F2 fault is consisted of SE-trending left-order en-echelon faults.The development history of Chengdong fault could divide into four stages,including the deposition periods during Kongdian formation to Member 4 of Shahejie formation,Member 3 of Shahejie formation to Lower Member 2 of Shahejie formation,Upper Member 2 of Shahejie formation to Dongying formation and Guantao formation to Minghuazhen formation.Regional tectonic background during different time periods controls the formation and evolutionary process of Chengdong fault.
Chengdong fault in the northeast of Jiyang depression is an important basin-controlling fault.Based on the fine interpretation of 3D seismic data of Chengdong area in Jiyang depression,and combined with correlation analysis technology,the structural characteristics as well as fault nature,evolution process and its formation mechanism were analyzed.The research results show that Chengdong fault is a characteristic strike-slip fault.According to the structural characteristics,Chengdong fault can be divided into two parts,the south section(F1) and north section(F2).F1 fault manifested "dolphin effect" is the main body of Chengdong fault.F2 fault is consisted of SE-trending left-order en-echelon faults.The development history of Chengdong fault could divide into four stages,including the deposition periods during Kongdian formation to Member 4 of Shahejie formation,Member 3 of Shahejie formation to Lower Member 2 of Shahejie formation,Upper Member 2 of Shahejie formation to Dongying formation and Guantao formation to Minghuazhen formation.Regional tectonic background during different time periods controls the formation and evolutionary process of Chengdong fault.
引文
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[3]张明振,付瑾平,印兴耀.桩海地区的走滑和挤压构造特征[J].油气地质与采收率,2006,13(2):5-7.
[4]胡贤根,谭明友,张明振.济阳坳陷东部走滑构造形成机制[J].油气地球物理,2007,5(1):50-58.
[5]池英柳,赵文智.渤海湾盆地新生代走滑构造与油气聚集[J].石油学报,2000,21(2):14-20.
[6]吴智平,李伟,郑德顺,等.沾化凹陷中、新生代断裂发育及其形成机制分析[J].高校地质学报,2004,10(3):405-417.
[7]衣学磊,侯贵廷.济阳坳陷中、新生代断裂活动强度研究[J].北京大学学报:自然科学版,2002,38(4):504-509.
[8]陈清华,陈诗望,冷风.胜利油区桩海地区前第三系断裂构造特征[J].断块油气田,2004,11(5):1-2.
[9]李思田.盆地动力学与能源资源———世纪之交的回顾与展望[J].地学前缘,2000,7(3):1-9.
[10]邓晋福,苏尚国,赵海玲,等.华北地区燕山期岩石圈减薄的深部过程[J].地学前缘,2003,10(3):41-50.
[11]郑建平,路凤香,SYO REILLY,等.华北地台东部古生代与新生代岩石圈地幔特征及其演化[J].地质学报,1999,73(1):47-56.
[12]许文良,王冬艳,王嗣敏.中国东部中新生代火山作用的pTtc模型与岩石圈演化[J].长春科技大学学报,2000,30(4):329-335.
[13]郭兴伟,施小斌,丘学林,等.渤海湾盆地新生代沉降特征及其动力学机制探讨[J].大地构造与成矿学,2007,31(3):273-280.
[14]任凤楼,柳忠泉,邱连贵,等.渤海湾盆地新生代各坳陷沉降的时空差异性[J].地质科学,2008,43(3):546-557.
[15]漆家福,邓荣敬,周心怀,等.渤海海域新生代盆地中的郯庐断裂带构造[J].中国科学:D辑(地球科学),2008,38(增刊):19-29.
[16]韩文功,季建清,王金铎,等.郯庐断裂带古新世———早始新世左旋走滑活动的反射地震证据[J].自然科学进展,2005,15(11):1383-1388.
[17]曹忠祥.营口-潍坊断裂带走滑-拉分裂陷盆地伸展量、沉降量估算[J].地质科学,2008,43(1):65-81.
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