鄂尔多斯盆地南部上三叠统延长组震积岩的发现及地质意义
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摘要
鄂尔多斯盆地南部中生界延长组长6—长8中发育与地震有关的震积岩,通过岩心观测识别出的震积岩标志主要有微同沉积断裂、震裂缝、液化砂岩脉、振动液化卷曲变形构造、地震角砾岩、负荷构造及枕状层等。同时在塔17井中发现完整的震积岩垂向序列,序列自下而上分为下伏未震层、微断裂层、微褶皱层、碎块层及液化均一层,上覆未震层。该震积岩的发现为盆地构造演化提供了动力学解释,表明晚三叠世随着秦岭、南祁连海槽的封闭,南北向逆冲带发生强烈活动,是本区延长组震积作用的直接诱发因素。同时该震积岩的发现,为盆地西南部延长组长6—长8发育的大规模浊积岩的外界触发机制是由地震活动引起的提供了有力证据。
Many earthquake-related seismites were discovered in the Chang 6-Chang 8 of the Yanchang Formation, Upper Triassic, southern Ordos Basin. Having surveyed the cores of wells, many typical deformation structures were discovered, such as syn-sedimentary micro fractures, stone veins, vibration liquefaction, deformation structure, earthquake breccia and load-casts and balls-and pillows types, etc. The complete vertical sequence of seismite of Well Ta 17, which include shattered rock bed, ladder-shaped faulted bed, vibration liquefaction deformation structure bed, liquefied sandstone vein bed, rubble bed and homogenized bed. The discovery of seismite can be used to interpret the tectonic evolvement of the basin. In Late Triassic, with the closing of Qinling and the sea slot of Southern Qilian, the south-north thrust band appeared strong activity. It was the direct inducing factors of the seimo-deposition in Yanchang Formation.and provided the evidence for the turbidite of Chang 6-Chang 8 of the Yanchang Formation, southwestern Ordos Basin, and the outsider trigger mechanism of the turbidite is earthquake activity.
Many earthquake-related seismites were discovered in the Chang 6-Chang 8 of the Yanchang Formation, Upper Triassic, southern Ordos Basin. Having surveyed the cores of wells, many typical deformation structures were discovered, such as syn-sedimentary micro fractures, stone veins, vibration liquefaction, deformation structure, earthquake breccia and load-casts and balls-and pillows types, etc. The complete vertical sequence of seismite of Well Ta 17, which include shattered rock bed, ladder-shaped faulted bed, vibration liquefaction deformation structure bed, liquefied sandstone vein bed, rubble bed and homogenized bed. The discovery of seismite can be used to interpret the tectonic evolvement of the basin. In Late Triassic, with the closing of Qinling and the sea slot of Southern Qilian, the south-north thrust band appeared strong activity. It was the direct inducing factors of the seimo-deposition in Yanchang Formation.and provided the evidence for the turbidite of Chang 6-Chang 8 of the Yanchang Formation, southwestern Ordos Basin, and the outsider trigger mechanism of the turbidite is earthquake activity.
引文
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2Seilacher A.Sedimentary structures tentatively attributed to seismic e-vents.Marine Geology,1984,55(1/2):1-12
3Mohindra R and Bagati TN.Seismically induced soft sediment deform-ation structures(seismites)around Sumdo in the Lower Spitti valley(Tethys Himalaya).Sedimentary Geology,1996,101(1-2):69-83
4Plaziat J C and Ahmamou M.Mechanic processes active in seismites:their identification and tectonic significance in the Pliocene basin of the Sais of Fes and Meknes(Morocco).Geodynamic Acta,1998,11(4):183-203
5Vanneste K,Meghraoui M and Camelbeeck T.Late Quaternary earth-quake-related soft-sediment deformation along the Belgian portion of the Feldbiss Fault,Lower Rhine Graben system.Tectonophysics,1999,309(1-4):57-79
6Shiki T,Cita MB and Gorsline D S.Sedimentary features of seismite,seismo-turbidites and tsunamitites-an introduction.Sedimentary Geolo-gy,2000,135(1-4):7-9
7乔秀夫,宋天锐,高林志,等.碳酸盐岩振动液化地震序列.地质学报,1994,68(1):16-32[Qiao Xiufu,Song Tianrui,Gao Linzhi,et al.Seismic sequence in carbonate rocks by vibration liquefaction.Acta Geologica Sinica,1994,68(1):16-32]
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9乔秀夫,高林志.华北中新元古代及早中生代地震灾变事件及与Rodinia的关系.科学通报,1999,44(16):1753-1758[QiaoXiufu,Gao Linzhi.Earth quake events in Neoproterozoic and early Paleozoic and its relationship with super continental Rodinia in North China.Chi-nese Science Bulletin,1999,44(16):1753-1758]
10乔秀夫,高林志,彭阳,等.古郯庐带沧浪铺阶地震事件、层序及构造意义.中国科学(D辑),2001,31(11):911-918[QiaoXiufu,Gaolinzhi,PengYang,et al.Seismic event,sequence and tectonic sig-nificance in Canglangpu Stagein Paleo-Tanlu Fault Zone.Science in China(Series D),2001,31(11):911-918]
11孙晓猛,梁定益,聂泽同.大陆边缘震积岩序列——以金沙江中段震积岩为例.现代地质,1995,9(3):1-27[Sun Xiaomeng,Liang Dingyi,Nie Zetong.Seismite sequence in continental margin-Taking seismite in middle region of Jinsha river as an example.Geosciences,1995,9(3):1-27]
12杜远生,张传恒,韩欣.滇西地区中元古代大龙口组震积岩的新发现.沉积学报,1999,24(增刊):28-37[Du Yuansheng,Zhang Chuanheng,Han Xin.New discovery of seismites in Dalongkou group in Mid-Proterozoicin Dianxi.Acta Sedimentologica Sinica,1996,14(Suppl.):28-37]
13杜远生,张传恒,韩欣.滇西中元古代昆阳群的地震事件沉积及其地质意义.中国科学(D辑),2001,31(4):284-290[Du Yuansh-eng,Zhang Chuanheng,HanXin.Earthquake events deposition and ge-ologic significance of Kunyang group in Mid Proterozoic in Dianxi.Science in China(Series D),2001,31(4):284-290]
14吴贤涛,尹国勋.四川峨眉晚侏罗世湖泊沉积中震积岩的发现及其意义.沉积学报,1992,10(3):19-24[Wu Xiantao,Yin Guoxun.Discovery and significance of seismites of lake deposition of Late Juras-sic in Ermei in Sichuan.Acta Sedimentologica Sinica,1992,10(3):19-24]
15张琴,朱筱敏,张建军,等.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.地质学报,2003,77(2):158-162[Zhang Qin,Zhu Xiaomin,Zhang Jianjun,et al.The discovery of seismite and its significance in Lower Cretaceous in Liugouzhuang and Kulongshan Region,Qingnan Sag,Jiuxi Basin.Acta Geologica Sinica,2003,77(2):158-162]
16陈世悦,袁文芳,鄢继华.济阳坳陷早第三纪震积岩的发现及其意义.地质科学,2003,38(3):377-386[Chen Shiyue,Yuan Wen-fang,Yan Jihua.Discovery and significance of earthquake event de-posits of Early Tertiary in the Jiyang Depression.Chinese Journal of Geology,2003,38(3):377-386]
17袁静.山东惠民凹陷古近纪震积岩特征及其地质意义.沉积学报,2004,22(1):41-46[Yuan Jing.The property and geological sig-nificance of seismites of Paleogene in Huimin Sag,Shandong Prov-ince.Acta Sedimentologica Sinica,2004,22(1):41-46]
18付文利,王艳琴,杨光,等.东营凹陷沙三段、沙四段震积岩研究.油气地质与采收率,2004,11(2):6-8[Fu Wenli,Wang Yanqin,Yang Guang,et al.Study on seismite of Sha3and Sha4member in Dongying sag.PetroleumGeology and Recovery Efficiency,2004,11(2):6-8]
19赵卫卫,查明,杨剑萍.中国震积岩研究综述.地层学杂志,2006,30(2):172-176[Zhao Weiwei,Zha Ming,Yang Jianping.An over-view of seismite research in China.Journal of Stratigraphy,2006,30(2):172-176]
20赵重远,等.华北克拉通沉积盆地形成与油气赋存.西安:西北大学出版社,1990.1-63[Zhao Chongyuan,et al.Formof Craton Sedi-mentary Basin and Oil&Gas in Huabei.Xi’an:Northwest University Press,1990.1-63]
21杜远生,韩欣.论震积作用和震积岩.地球科学进展,2000,15(4):389-394[Du Yuansheng,Han Xin.Seismo-deposition and seis-mites.Advance in Earth Sciences,2000,15(4):389-394]
22Roep TB,Events A J.Pillow-beds:a newtype of seismites?An ex-ample from an Oligocene turbidite fan complex,Alicante.Sedimentol-ogy,1992,39:711-724
23张国伟,张本仁,袁学诚,等.秦岭造山带与大陆动力学.北京:科学出版社,2001.706-724[Zhang Guowei,Zhang Benren,Yuan Xuecheng,et al.Qinling Orogene and Continental Dynamics.Bei-jing:Science Press,2001.706-724]
24刘池洋,赵红格,桂小军,等.鄂尔多斯盆地演化—改造的时空坐标及其成藏(矿)响应.地质学报,2006,80(5):618-638[Liu Chiyang,Zhao Hongge,Gui Xiaojun,et al.Space-time coordinate of the evolution and reformation and mineralization response in Ordos Ba-sin.Acta Geologica Sinica,2006,80(5):618-638]
25郭建华,王方平,刘贵,等.湘西大庸上震旦统灯影组震裂角砾岩.石油实验地质,1999,21(3):219-224[Guo Jianhua,Wang Fangping,Liu Gui,et al.Shattered breccias of the upper Sinian Dengying Formation in Dayong,Western Hunan Province.Experimen-tal Petroleum Geology,1999,21(3):219-224]
2Seilacher A.Sedimentary structures tentatively attributed to seismic e-vents.Marine Geology,1984,55(1/2):1-12
3Mohindra R and Bagati TN.Seismically induced soft sediment deform-ation structures(seismites)around Sumdo in the Lower Spitti valley(Tethys Himalaya).Sedimentary Geology,1996,101(1-2):69-83
4Plaziat J C and Ahmamou M.Mechanic processes active in seismites:their identification and tectonic significance in the Pliocene basin of the Sais of Fes and Meknes(Morocco).Geodynamic Acta,1998,11(4):183-203
5Vanneste K,Meghraoui M and Camelbeeck T.Late Quaternary earth-quake-related soft-sediment deformation along the Belgian portion of the Feldbiss Fault,Lower Rhine Graben system.Tectonophysics,1999,309(1-4):57-79
6Shiki T,Cita MB and Gorsline D S.Sedimentary features of seismite,seismo-turbidites and tsunamitites-an introduction.Sedimentary Geolo-gy,2000,135(1-4):7-9
7乔秀夫,宋天锐,高林志,等.碳酸盐岩振动液化地震序列.地质学报,1994,68(1):16-32[Qiao Xiufu,Song Tianrui,Gao Linzhi,et al.Seismic sequence in carbonate rocks by vibration liquefaction.Acta Geologica Sinica,1994,68(1):16-32]
8乔秀夫,李海兵,高林志.华北地台震旦纪-早古生代地震节律.地学前缘,1997,4(3-4):155-160[Qiao Xiufu,Li Haibing,Gao Linz-hi.Sinian-early Paleozoic seismic rhythm north China platform.Earth Science Frontiers,1997,4(3-4):155-160]
9乔秀夫,高林志.华北中新元古代及早中生代地震灾变事件及与Rodinia的关系.科学通报,1999,44(16):1753-1758[QiaoXiufu,Gao Linzhi.Earth quake events in Neoproterozoic and early Paleozoic and its relationship with super continental Rodinia in North China.Chi-nese Science Bulletin,1999,44(16):1753-1758]
10乔秀夫,高林志,彭阳,等.古郯庐带沧浪铺阶地震事件、层序及构造意义.中国科学(D辑),2001,31(11):911-918[QiaoXiufu,Gaolinzhi,PengYang,et al.Seismic event,sequence and tectonic sig-nificance in Canglangpu Stagein Paleo-Tanlu Fault Zone.Science in China(Series D),2001,31(11):911-918]
11孙晓猛,梁定益,聂泽同.大陆边缘震积岩序列——以金沙江中段震积岩为例.现代地质,1995,9(3):1-27[Sun Xiaomeng,Liang Dingyi,Nie Zetong.Seismite sequence in continental margin-Taking seismite in middle region of Jinsha river as an example.Geosciences,1995,9(3):1-27]
12杜远生,张传恒,韩欣.滇西地区中元古代大龙口组震积岩的新发现.沉积学报,1999,24(增刊):28-37[Du Yuansheng,Zhang Chuanheng,Han Xin.New discovery of seismites in Dalongkou group in Mid-Proterozoicin Dianxi.Acta Sedimentologica Sinica,1996,14(Suppl.):28-37]
13杜远生,张传恒,韩欣.滇西中元古代昆阳群的地震事件沉积及其地质意义.中国科学(D辑),2001,31(4):284-290[Du Yuansh-eng,Zhang Chuanheng,HanXin.Earthquake events deposition and ge-ologic significance of Kunyang group in Mid Proterozoic in Dianxi.Science in China(Series D),2001,31(4):284-290]
14吴贤涛,尹国勋.四川峨眉晚侏罗世湖泊沉积中震积岩的发现及其意义.沉积学报,1992,10(3):19-24[Wu Xiantao,Yin Guoxun.Discovery and significance of seismites of lake deposition of Late Juras-sic in Ermei in Sichuan.Acta Sedimentologica Sinica,1992,10(3):19-24]
15张琴,朱筱敏,张建军,等.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.地质学报,2003,77(2):158-162[Zhang Qin,Zhu Xiaomin,Zhang Jianjun,et al.The discovery of seismite and its significance in Lower Cretaceous in Liugouzhuang and Kulongshan Region,Qingnan Sag,Jiuxi Basin.Acta Geologica Sinica,2003,77(2):158-162]
16陈世悦,袁文芳,鄢继华.济阳坳陷早第三纪震积岩的发现及其意义.地质科学,2003,38(3):377-386[Chen Shiyue,Yuan Wen-fang,Yan Jihua.Discovery and significance of earthquake event de-posits of Early Tertiary in the Jiyang Depression.Chinese Journal of Geology,2003,38(3):377-386]
17袁静.山东惠民凹陷古近纪震积岩特征及其地质意义.沉积学报,2004,22(1):41-46[Yuan Jing.The property and geological sig-nificance of seismites of Paleogene in Huimin Sag,Shandong Prov-ince.Acta Sedimentologica Sinica,2004,22(1):41-46]
18付文利,王艳琴,杨光,等.东营凹陷沙三段、沙四段震积岩研究.油气地质与采收率,2004,11(2):6-8[Fu Wenli,Wang Yanqin,Yang Guang,et al.Study on seismite of Sha3and Sha4member in Dongying sag.PetroleumGeology and Recovery Efficiency,2004,11(2):6-8]
19赵卫卫,查明,杨剑萍.中国震积岩研究综述.地层学杂志,2006,30(2):172-176[Zhao Weiwei,Zha Ming,Yang Jianping.An over-view of seismite research in China.Journal of Stratigraphy,2006,30(2):172-176]
20赵重远,等.华北克拉通沉积盆地形成与油气赋存.西安:西北大学出版社,1990.1-63[Zhao Chongyuan,et al.Formof Craton Sedi-mentary Basin and Oil&Gas in Huabei.Xi’an:Northwest University Press,1990.1-63]
21杜远生,韩欣.论震积作用和震积岩.地球科学进展,2000,15(4):389-394[Du Yuansheng,Han Xin.Seismo-deposition and seis-mites.Advance in Earth Sciences,2000,15(4):389-394]
22Roep TB,Events A J.Pillow-beds:a newtype of seismites?An ex-ample from an Oligocene turbidite fan complex,Alicante.Sedimentol-ogy,1992,39:711-724
23张国伟,张本仁,袁学诚,等.秦岭造山带与大陆动力学.北京:科学出版社,2001.706-724[Zhang Guowei,Zhang Benren,Yuan Xuecheng,et al.Qinling Orogene and Continental Dynamics.Bei-jing:Science Press,2001.706-724]
24刘池洋,赵红格,桂小军,等.鄂尔多斯盆地演化—改造的时空坐标及其成藏(矿)响应.地质学报,2006,80(5):618-638[Liu Chiyang,Zhao Hongge,Gui Xiaojun,et al.Space-time coordinate of the evolution and reformation and mineralization response in Ordos Ba-sin.Acta Geologica Sinica,2006,80(5):618-638]
25郭建华,王方平,刘贵,等.湘西大庸上震旦统灯影组震裂角砾岩.石油实验地质,1999,21(3):219-224[Guo Jianhua,Wang Fangping,Liu Gui,et al.Shattered breccias of the upper Sinian Dengying Formation in Dayong,Western Hunan Province.Experimen-tal Petroleum Geology,1999,21(3):219-224]
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