营口—潍坊断裂带新生代走滑拉分—裂陷盆地伸展量、沉降量估算
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摘要
应用通过营口—潍坊断裂带及相关新生代盆地的地震剖面,采用专业软件分别计算了潍北凹陷、青东凹陷、莱州湾凹陷、黄河口凹陷、渤中凹陷、渤东凹陷、辽中凹陷和辽东凹陷的伸展量及构造沉降量,表明虽然同受断裂带走滑和软流圈上涌控制,但不同区段新生代伸展作用方向、主要发生时间和强度都有差别。南段是南北方向伸展,伸展作用主要发生在古新-始新世孔店组—沙河街组三段沉积时期;中段渤中—辽东湾南部地区具有多向伸展特征,近东西方向和南北方向伸展作用最为强烈,主要伸展作用发生在中-晚始新世、渐新世和新近纪,特别是以新近纪强烈伸展作用区别于其它地区;北段即辽东湾中-北部地区主要是北西—南东方向伸展,主要伸展活动发生在中始新世沙河街组三段和渐新世东营组沉积时期。文章总结了4种不同类型的沉降,指出新生代的构造活动随时间有自南向北推移和自两侧向中间迁移的规律,提出不同方向断裂带的活化和新近纪北东东向新生构造的形成是裂陷强度向中间迁移并产生4种不同沉降类型盆地的原因。
A group of Cenozoic basins developed along the Yingkou-Weifang fault zone.Based on seismic sections of intersect the Yingkou-Weifang fault zone,the paper calculated extensional quantities and subsidence rates of 8 Cenozoic rifting or pull-apart sags,namely,the Weibei,Qingdong,Laizhouwan,Huanghekou,Bozhong,Bodong,Liaozhong and Liaodong Sags along the Yingkou-Weifang fault zone.The results indicated that these sags had varied extensional directions,subsidence scales and main rifting periods,although all of them were controlled by strike-slipping of the fault and asthenospheric upwelling in the area.In the southern segment,the N-S extension occurred from Paleocene to Eocene(sedimentary period of the Kongdian Formation and the 3rd Member of Shahejie Formation).In the middle segment(the Bozhong Sag and southern Liaodong Bay),the multi-direction extension occurred mainly in Middle Eocene,Oligocene and Neogene.In the middle-northern part of the Liaodong Bay,the NW-SE extension developed mainly in Middle Eocene(sedimentary period of the 3rd Member of Shahejie Formation)and Oligocene(sedimentary period of the Dongying Formation).To sum up,four types of subsidence curves,and correspondingly,four kinds of Cenozoic basin patterns were presented,which might be resulted from reactivation of Mesozoic faults with different directions and newly generated NEE-striking fault only in the Bohai Bay during Neogene.So,the developing of the rifting or pull-apart basins migrated from the south to the north,and from the both sides to the centre.
A group of Cenozoic basins developed along the Yingkou-Weifang fault zone.Based on seismic sections of intersect the Yingkou-Weifang fault zone,the paper calculated extensional quantities and subsidence rates of 8 Cenozoic rifting or pull-apart sags,namely,the Weibei,Qingdong,Laizhouwan,Huanghekou,Bozhong,Bodong,Liaozhong and Liaodong Sags along the Yingkou-Weifang fault zone.The results indicated that these sags had varied extensional directions,subsidence scales and main rifting periods,although all of them were controlled by strike-slipping of the fault and asthenospheric upwelling in the area.In the southern segment,the N-S extension occurred from Paleocene to Eocene(sedimentary period of the Kongdian Formation and the 3rd Member of Shahejie Formation).In the middle segment(the Bozhong Sag and southern Liaodong Bay),the multi-direction extension occurred mainly in Middle Eocene,Oligocene and Neogene.In the middle-northern part of the Liaodong Bay,the NW-SE extension developed mainly in Middle Eocene(sedimentary period of the 3rd Member of Shahejie Formation)and Oligocene(sedimentary period of the Dongying Formation).To sum up,four types of subsidence curves,and correspondingly,four kinds of Cenozoic basin patterns were presented,which might be resulted from reactivation of Mesozoic faults with different directions and newly generated NEE-striking fault only in the Bohai Bay during Neogene.So,the developing of the rifting or pull-apart basins migrated from the south to the north,and from the both sides to the centre.
引文
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崔向东,王仁厚,石敦久,袁清秋,马宏斌.2007.辽河坳陷滩海月东油田新近系馆陶组底界研究.地质科学,42(3):455—468.Cui Xiangdong,Wang Renhou,Shi Dunjiu,Yuan Qingqiu and Ma Hongbin.2007.Basal beds of the Neogene Guantao For-mation in Yuedong Oilfield,beach area of the Liaohe Depression.Chinese Jour.Geol.,42(3):455—468.
高祥林.2006.渤海中部郯庐断裂带的近期活动与渤海新近纪新生断裂.地质科学,41(2):355—364.Gao Xianglin.2006.Recent activities of the Tan-Lu fault zone in the central Bohai Sea and newly generated faults during Neo-gene in Bohai.Chinese Jour.Geol.,41(2):355—364.
葛建党.2001.郯庐断裂在渤中凹陷的构造特征与油气成藏的关系.海洋石油,(1):14—20.Ge Jiandang.2001.The tectonic character of Tanlu Fault(TLF)and the relation between TLF and hydrocarbon accumulationin Bozhong Sag.Offshore Oil,(1):14—20.
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侯贵廷,钱祥麟,蔡东升.2001.渤海湾盆地中、新生代构造演化研究.北京大学学报(自然科学版),37(6):845—851.Hou Guiting,Qian Xianglin and Cai Dongsheng.2001.The tectonic evolution of Bohai Basin in Mesozoic and Cenozoic time.Acta Scicentiarum Naturalium Universitaties Pekinensis,37(6):845—851.
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高祥林.2006.渤海中部郯庐断裂带的近期活动与渤海新近纪新生断裂.地质科学,41(2):355—364.Gao Xianglin.2006.Recent activities of the Tan-Lu fault zone in the central Bohai Sea and newly generated faults during Neo-gene in Bohai.Chinese Jour.Geol.,41(2):355—364.
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韩文功,季建清.王金铎,于建国,张新钰,余绍立.2005.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.自然科学进展,15(11):1383—1388.Han Wengong,Ji Jianqing,Wang Jinduo,Yu Jianguo,Zhang Xinyu and Yu Shaoli.2005.Paleocene-Early Eocene sinistralstrike-slipping of the Tan-Lu fault zone:evidence from reflection seismic exploration.Advance in Natural Science,15(11):1383—1388.
侯贵廷,钱祥麟,蔡东升.2001.渤海湾盆地中、新生代构造演化研究.北京大学学报(自然科学版),37(6):845—851.Hou Guiting,Qian Xianglin and Cai Dongsheng.2001.The tectonic evolution of Bohai Basin in Mesozoic and Cenozoic time.Acta Scicentiarum Naturalium Universitaties Pekinensis,37(6):845—851.
李晓清,汪泽成,程有义.2003.拉分盆地分析与含油气性——以潍北盆地为例.东营:石油大学出版社.35—39.Li Xiaoqing,Wang Zecheng and Cheng Youyi.2003.Analysis on Pull-Apart Basin and Its Petroliferous Characters.Dongy-ing:University of Petroleum Press.35—39.
梁兴,吴根耀.2006a.赣江断裂带中生代的演化及其地球动力学背景.地质科学,41(1):64—80.Liang Xing and Wu Genyao.2006a.Mesozoic evolution of the Ganjiang fault zone and related geodynamic settings.ChineseJour.Geol.,41(1):64—80.
梁兴,叶舟,吴根耀,郑华平,徐克定,张廷山,刘家铎.2006b.鄱阳盆地构造—沉积特征及其演化史.地质科学,41(3):404—429.Liang Xing,Ye Zhou,Wu Genyao,Zheng Huaping,Xu Keding,Zhang Tingshan and Liu Jiaduo.2006b.Sedimento-tectonicfeatures and geological evolution of the Poyang Basin.Chinese Jour.Geol.,41(3):404—429.
刘和甫,夏义平,殷进垠,尚培乐.1999.走滑造山带与盆地耦合机制.地学前缘,6(3):121—132.Liu Hefu,Xia Yiping,Yin Jinyin and Shang Peile.1999.Coupling mechanism of strike-slip orogen and basin.Earth ScienceFrontiers,6(3):121—132.
刘和甫,李晓清,刘立群.2004.走滑构造体系盆山耦合与区带分析.现代地质,18(2):139—150.Liu Hefu,Li Xiaoqing and Liu Liqun.2004.Petroleum play analysis and strike slip system basin-mountain coupling.Geosci-ence,18(2):139—150.
陆克政,漆家福.1997.渤海湾新生代含油气盆地构造模式.北京:地质出版社.179.Lu Kezheng and Qi Jiafu.1997.Structural Model for Cenozoic Petroliferous Basins in the Bohai Bay.Beijing:GeologicalPubl.House.179.
漆家福.2004.渤海湾新生代盆地的两种构造系统及其成因解释.中国地质,31(1):15—22.Qi Jiafu.2004.Two tectonic systems in the Cenozoic Bohai Bay basin and their genetic interpretation.Geology in China,31(1):15—22.
漆家福,陈发景.1995a.下辽河—辽东湾新生代裂陷盆地的构造解析.北京:地质出版社.44—53.Qi Jiafu and Chen Fajing.1995a.Structural Analysis of the Cenozoic Xialiaohe-Liaodongwan Rift Basin.Beijing:GeologicalPubl.House.44—53.
漆家福,陈发景,杨桥,陈昭年.1994.辽东湾—下辽河盆地新生代构造的运动学特征及其演化过程.现代地质,8(1):34—42.Qi Jiafu,Chen Fajing,Yang Qiao and Chen Zhaonian.1994.Kinematic characteristics and evolution of the Cenozoic tectonicsin Liaodongwan-Xialiaohe Basin.Geoscience,8(1):34—42.
漆家福,张一伟,陆克政,杨桥.1995b.渤海湾新生代裂陷盆地的伸展模式及其动力学过程.石油实验地质,17(4):316—323.Qi Jiafu,Zhang Yiwei,Lu Kezheng and Yang Qiao.1995b.Extensional pattern and dynamic process of the Cenozoic rifting ba-sin in the Bohai Bay.Experimental Petroleum Geology,17(4):316—323.
漆家福,杨桥,王子煜,周建勋.2001.关于编制盆地构造演化剖面的几个问题的讨论.地质论评,47(4):388—392.Qi Jiafu,Yang Qiao,Wang Ziyu and Zhou Jianxun.2001.Some problems about compiling tectonic evolution sections of basin.Geol.Rev.,47(4):388—392.
漆家福,肖焕钦,张卫刚.2003.东营凹陷主干边界断层(带)构造几何学、运动学特征及成因解释.石油勘探与开发,30(3):8—12.Qi Jiafu,Xiao Huanqin and Zhang Weigang.2003.Geometry,kinematics and mechanism interpretation of the major boundaryfaults in Dongying Sag.Petroleum Exploration and Development,30(3):8—12.
任凤楼,张岳桥,邱连贵,柳忠泉,王大华.2007.胶莱盆地白垩纪构造应力场与转换机制.大地构造与成矿学,31(2):157—167.Ren Fenglou,Zhang Yueqiao,Qiu Liangui,Liu Zhongquan and Wang Dahua.2007.Strucutral stress field evolution of JiaolaiBasin in the Cretaceous.Geotectonica et Metallogenia,31(2):157—167.
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