莱阳凹陷莱阳群层序特征及其对走滑活动的响应
摘要
本文基于前人研究成果,利用莱阳凹陷较完整的地质露头、地震和钻井岩心等资料,在莱阳凹陷莱阳群共识别出2个区域性不整合界面SB1、SB3,1个局部不整合面SB2,将莱阳群作为一个二级构造层序,以其内部的次一级局部不整合面SB2为界,分为SQ1(瓦屋夼组)、SQ2(止凤庄组—曲格庄组)两个三级层序。根据SQ2内部层序结构及其沉积特征,将其划分为低水位体系域、水进体系域和高水位体系域,反映了由走滑强烈拉张经走滑拉张相对平静向走滑挤压转化的构造演化过程,主要表现为冲积扇和冲积扇—冲积平原—河流相沿桃村—东陡山断裂向北东方向不断迁移,并导致莱阳凹陷东北部的抬升和剥蚀。
Based on previous studies,integral outcrops,seismic data,and core data,we identify two regional unconformities(SB1,SB3) and one local unconformity(SB2) in the Laiyang group of Laiyang depression.Considering the Laiyang group as one second-order tectonic sequence,we divide the Laiyang group into two third-order sequences,SQ1(Wawukuang formation) and SQ2(Zhifengzhuang formation-Qugezhuang formation) separated by SB2 local boundary.According to its internal sequence architectures and depositional characteristics,SQ2 is divided into lowstand system-tract,transgressive system-tract,and highstand system-tract.This represents the tectonic evolution process from intensive strike-slip extension through relative quiet strike-slip extension to strike-slip compression.It presents that alluvial fan facies-alluvial plain facies-fluvial facies gradually migrated towards the NE direction along the Taocun-Dongdoushan fault,and it caused the northeastern depression uplifting and to be eroded.
Based on previous studies,integral outcrops,seismic data,and core data,we identify two regional unconformities(SB1,SB3) and one local unconformity(SB2) in the Laiyang group of Laiyang depression.Considering the Laiyang group as one second-order tectonic sequence,we divide the Laiyang group into two third-order sequences,SQ1(Wawukuang formation) and SQ2(Zhifengzhuang formation-Qugezhuang formation) separated by SB2 local boundary.According to its internal sequence architectures and depositional characteristics,SQ2 is divided into lowstand system-tract,transgressive system-tract,and highstand system-tract.This represents the tectonic evolution process from intensive strike-slip extension through relative quiet strike-slip extension to strike-slip compression.It presents that alluvial fan facies-alluvial plain facies-fluvial facies gradually migrated towards the NE direction along the Taocun-Dongdoushan fault,and it caused the northeastern depression uplifting and to be eroded.
引文
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[8]刘国生,朱光,王道轩等.郯庐断裂带张八岭隆起段走滑运动与合肥盆地的沉积响应.沉积学报,2002,20(2):267~273Liu Guo-sheng,Zhu Guang,Wang Dao-xuan et al.Strike-slip movement on the Zhangbaling uplift seg-ment of the Tan-Lu fault and the depositional re-sponse in the Hefei basin.Acta Sedimentologica Sin-ia,2002,20(2):267~273
[9]唐华风,程日辉,王璞珺等.走滑拉分盆地层序构成特征——以胶莱盆地莱阳群为例.沉积与特提斯地质,2006,26(3):31~36Tang Hua-feng,Cheng Ri-hui,Wang Pu-jun et al.Sequence stratigraphy in a strike-slip(pull-apart)ba-sin:an example from the Laiyang group in the Jiaolaibasin.Sedimentary Geology and Tethyan Geology,2006,26(3):31~36
[10]陈书平,戴俊生,宋全友等.胶莱盆地构造应力场特征及数学模拟.石油大学学报(自然科学版),1998,22(3):19~25Chen Shu-ping,Dai Jun-sheng,Song Quan-you et al.Features of tectonic stress fields in Jiaolai basin.Journal of the University of Petroleum,China(E-dition of Natural Science),1998,22(3):19~25
[11]宋明水,吴智平,戴俊生等.胶莱坳陷原型盆地恢复及石油地质条件分析.山东东营:中国石油大学出版社,2005,15(17):27~78,143
[12]姜在兴,熊继辉,王留奇等.胶莱盆地下白垩统莱阳组沉积作用和沉积演化.石油大学学报(自然科学版),1993,17(2):8~16Jiang Zai-xing,Xiong Ji-hui,Wang Liu-qi et al.Sedim-entology and sedimentary evolution of Lower CretaceousLaiyang formation in Jiaolai basin.Journal of the Uni-versity of Petroleum,China(Edition of Natural Sci-ence),1993,17(2):8~16
[13]纪友亮,安爱琴,朱如凯.陆相前陆盆地层序结构特征研究——以准噶尔南缘晚期前陆盆地为例.石油与天然气地质,2008,29(2):237~243Ji You-liang,An Ai-qin,Zhu Ru-kai.Research onsequence architectures of continental foreland basins:a case study of the late stage of the southern Junggarforeland basin.Oil&Gas Geology,2008,29(2):237~243
[2]唐华风,程日辉,白云风等.胶莱盆地构造演化规律.世界地质,2003,22(3):246~251Tang Hua-feng,Cheng Ri-hui,Bai Yun-feng et al.Tectonic evolution of the Jiaolai basin.Global Geolo-gy,2003,22(3):246~251
[3]陆克政,戴俊生,陈书平等.胶莱盆地的形成和演化.山东东营:石油大学出版社,1994,12~32,40~41,106~114
[4]刘和甫,夏义平,殷进垠等.走滑造山带与盆地耦合机制.地学前缘,1999,6(3):121~132Liu He-fu,Xia Yi-ping,Yin Jin-yin et al.Couplingmechanism of strike-slip orogen and basin.Earth Sci-ence Frontiers,1999,6(3):121~132
[5]张增奇,刘明渭,宋志勇等.山东省岩石地层.湖北武汉:中国地质大学出版社,1996,208~219
[6]邓宏文,郭建宇,王瑞菊等.陆相断陷盆地的构造层序地层分析.地学前缘,2008,15(2):1~7Deng Hong-wen,Guo Jian-yu,Wang Rui-ju et al.Tectono-sequence stratigraphic analysis in continentalfaulted basins.Earth Science Frontiers,2008,15(2):1~7
[7]柳祖汉,吴根耀,杨孟达等.柴达木盆地西部新生代沉积特征及其对阿尔金断裂走滑活动的响应.地质科学,2006,41(2):344~354Liu Zu-han,Wu Gen-yao,Yang Meng-da et al.Sedi-mentary features of the Cenozoic in the Western Qaid-am basin:response to strike-slipping of the Altunfault.Chinese Journal of Geology,2006,41(2):344~354
[8]刘国生,朱光,王道轩等.郯庐断裂带张八岭隆起段走滑运动与合肥盆地的沉积响应.沉积学报,2002,20(2):267~273Liu Guo-sheng,Zhu Guang,Wang Dao-xuan et al.Strike-slip movement on the Zhangbaling uplift seg-ment of the Tan-Lu fault and the depositional re-sponse in the Hefei basin.Acta Sedimentologica Sin-ia,2002,20(2):267~273
[9]唐华风,程日辉,王璞珺等.走滑拉分盆地层序构成特征——以胶莱盆地莱阳群为例.沉积与特提斯地质,2006,26(3):31~36Tang Hua-feng,Cheng Ri-hui,Wang Pu-jun et al.Sequence stratigraphy in a strike-slip(pull-apart)ba-sin:an example from the Laiyang group in the Jiaolaibasin.Sedimentary Geology and Tethyan Geology,2006,26(3):31~36
[10]陈书平,戴俊生,宋全友等.胶莱盆地构造应力场特征及数学模拟.石油大学学报(自然科学版),1998,22(3):19~25Chen Shu-ping,Dai Jun-sheng,Song Quan-you et al.Features of tectonic stress fields in Jiaolai basin.Journal of the University of Petroleum,China(E-dition of Natural Science),1998,22(3):19~25
[11]宋明水,吴智平,戴俊生等.胶莱坳陷原型盆地恢复及石油地质条件分析.山东东营:中国石油大学出版社,2005,15(17):27~78,143
[12]姜在兴,熊继辉,王留奇等.胶莱盆地下白垩统莱阳组沉积作用和沉积演化.石油大学学报(自然科学版),1993,17(2):8~16Jiang Zai-xing,Xiong Ji-hui,Wang Liu-qi et al.Sedim-entology and sedimentary evolution of Lower CretaceousLaiyang formation in Jiaolai basin.Journal of the Uni-versity of Petroleum,China(Edition of Natural Sci-ence),1993,17(2):8~16
[13]纪友亮,安爱琴,朱如凯.陆相前陆盆地层序结构特征研究——以准噶尔南缘晚期前陆盆地为例.石油与天然气地质,2008,29(2):237~243Ji You-liang,An Ai-qin,Zhu Ru-kai.Research onsequence architectures of continental foreland basins:a case study of the late stage of the southern Junggarforeland basin.Oil&Gas Geology,2008,29(2):237~243
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