龙门山晚三叠世软沉积物变形与印支期构造运动
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
龙门山地区上三叠统包括卡尼阶马鞍塘组、诺利阶小塘子组与瑞替阶须家河组。通过野外研究在小塘子组与须家河组的多个层位中首次识别出丰富的地震触发成因的软沉积物变形,包括液化变形(液化角砾岩液化滴状体、液化底劈、液化均一层等);塑性变形(卷曲变形,软布丁)以及与重力作用相关的负载、球-枕、枕状层上述软沉积物变形是龙门山地区晚三叠世构造运动的响应,它们是印支期松潘-甘孜地体与扬子板块裂开、碰撞逆冲走滑伴生的地震事件的记录。通过古地震事件与沉积事件结合分析,提出龙门山地区印支期的构造运动过程为:晚三叠世中期(印支构造期中期)松潘-甘孜地体与扬子板块开始裂开,古断裂走向近NS,断裂活动产生的地震于小塘子组浅海沉积中触发一系列软沉积物变形;晚三叠世晚期(印支构造期晚期)松潘-甘孜地体与上扬子板块发生陆内俯冲,地震诱发须家河组湖相沉积物变形;晚三叠世末期(印支构造期末期)松潘-甘孜地体左旋走滑逆冲于上扬子板块之上,形成松潘-甘孜山与川西前陆盆地,二者边界即现今的汶川-茂县断裂,印支期的造陆与造山伴随古地震发生。依据已识别的软沉积物液化变形位置与汶茂断裂的距离,估算出诺利阶小塘子组古地震震级约为Ms7.2;目前小塘子组液化变形记录远非距汶茂断裂最远的液化点,因而实际的古地震震级远远大于Ms7.2,应存在更强的地震事件。龙门山发生的毁灭性大地震(如2008,5,12汶川大地震Ms8)实际上于晚三叠世期间早已频繁发生,现今龙门山的活动地震带是中生代古地震带的延续。
The Upper Triassic Series of the Longmenshan region includes the Carnian Ma'antang Formation,the Norian Xiaotangzi Formation and the Rhaetian Xujiahe Formation.Field study firstly revealed existence of abundant soft-sediment deformations triggeried by earthquakes in several horizons of the Xiaotangzi and Xujiahe formations.Deformation includes liquefaction-induced deformation(liquefied breccia,liquefied droplet,liquefied diapir,and liquefied homogeneous layer,etc.),plastic deformation(convolute deformation,soft pudding),and gravity related load,ball-and-pillow and pillow beds.The above soft-sediment deformations were responses to the Late Triassic tectonic movement in the Longmenshan region and are the records of seismic events associated with the breakup,collision and obduction strike-slip between the Songpan-Ganzi terrane and the Yangtze plate in the Indosinian period.Integrated analysis of paleoseismic events and sedimentary events displays a complete tectonic movement process in the Longmenshan region during the Indosinian period:at the middle stage of the Late Triassic(the middle stage of the Indosinian tectonic period),breakup of the Songpan-Ganzi terrane and the Yangtze plate resulted in a near NS-trending paleo-fault,and earthquake generated by the fault movement triggered a series of soft-sediment deformations in the neritic sediment of the Xiaotangzi Formation;at the late stage of the Late Triassic(the late stage of the Indosinian tectonic period),the intracontinental subduction of the Songpan-Ganzi terrane and the Upper Yangtze plate occurred,and the earthquake induced lake sediment deformations in the Xujiahe Formation;and at the late stage of the Late Triassic(the last stage of the Indosinian tectonic period),the Songpan-Ganzi terrane thrusted onto the Upper Yangtze plate through sinistral strike-slip obduction to form the Songpan-Ganzi Mountain and the western Sichuan Foreland Basin,their boundary is the Wenchuan-Maoxian fault now,and the epeirogeny and orogeny associated with paleoseism occurring in the Indosinian period.Based on the locations of the identified liquefaction-induced soft-sediment deformations and their distances to the Wenchuan-Maoxian fault,it was estimated that the magnitude of the paleoseism occurred in the Norian Xiaotangzi Formation was about Ms7.2.The current records of liquefaction-induced deformations in the Xiaotangzi Formation are far from the farthest liquefaction point away from the Wenchuan-Maoxian fault,so the actual magnitude of the paleoseism was far larger than Ms7.2 and there should have been stronger seismic events.Actually large catastrophic earthquakes(e.g.,Wenchuan large earthquake of Ms8 on May 12,2008) in Longmenshan had already occurred frequently during the Late Triassic,and the currently active seismic belt in Longmenshan is the continuation of the Mesozoic paleoseismic belt.
引文
曹俊兴,刘树根.2008.对四川汶川大地震有关问题的思考与初步认识.成都理工大学学报(自然科学版),35(4):414~425.
    邓宾,刘树根,刘顺,李智武,司建涛,郭兵,田小兵.2010.松潘-甘孜褶皱带较场弧型构造特征及其大地构造意义。地质论评,56(1):31~42.
    邓飞,贾东,罗良,李海滨,李一泉,武龙.2008.晚三叠世松潘-甘和川西前陆盆地的物源对比:构造演化和古地理变迁的线索地质评论,54(4):561~573.
    邓康龄.2007.龙门山构造带印支期构造逆进变形与变形时序.石油与天然气地质,29(4):485~492.
    邓起东,陈社发,赵小麟.1994.龙门山及其邻区的构造和地震活动及动力学.地震地质,16(4):389~402.
    苟宗海.1996.四川天全芦山宝兴地区须家河组地层特征.中国区域地质,4:323~329.
    苟宗海.1997.新兴乡-白水河上三叠统须家河组地层.见林茂炳等:龙门山地质考察指南.成都科技大学出版社,13~18.
    嵇少丞.2009.地震与中国大陆形影相随.北京:科学出版社,1~200.
    姜在兴,田继军,陈桂菊,李照佶,张满郎.2007.川西前陆盆地上三叠统沉积特征.古地理学报,9(2):143~154.
    李海兵,司家亮,付小方,邱祝礼,李宁,J.Van der woerd,裴军令,王宗秀,侯立玮,吴富峣.2009.2008年汶川地震同震滑移特征、最大滑移量及构造意义.第四纪研究,29(3):387~402.
    李勇,贺佩,颜照坤,董顺利,陶晓风.2010.晚三叠世龙门山前陆盆地动力学分析.成都理工大学学报(自然科学版),37(4):401~411.
    李勇,周荣军,A L Densmore,M S Ellis,等.2006.青藏高原东缘大陆动力学过程与地质响应.北京:地质出版社:1~148.
    李勇,周荣军.A L Densmore,M A Ellis.2006.龙门山断裂带走滑方向的反转及其沉积地貌标志.矿物岩石,26(4):26~34.
    李智武,陈洪德,刘树根,侯明才,邓宾.2010.龙门山冲断隆升及其走向差异的裂变径迹证据.地质科学,45(4):944~968.
    李智武,刘树根,陈洪德,刘顺,郭兵,田晓彬.2008.龙门山冲断带分段-分带性构造格局及其差异变形特征.成都理工大学(自然科学版),35(4):440~454.
    林亮彪,陈洪德,翟常博,胡晓强,李君文.2006.四川盆地西部须家河组砂岩组分及其古地理探讨.石油实验地质,28(6):511~517.
    刘树根,李智武,曹俊兴,刘顺,邓宾,王国芝,邓斌.2009.龙门山陆内复合造山带的四维结构特征.地质科学,44(4):1151~1180.
    刘树根,罗志立,载苏兰,Arne D.Wilson C J L,1995.龙门山冲断带的隆升和川西前陆盆地的沉降.地质学报,69(3):205~214.
    刘树根,罗志立,赵锡奎,徐国盛,王国芝,张成江.2003.中国西部盆山系统的耦合关系及其动力学模式——以龙门山造山带——川西前陆盆地系统为例.地质学报,77(2):177~186.
    刘树根.1993.龙门山冲断带与川西前陆盆地的形成演化.成都:成都科技大学出版社,1~167.
    刘颖,谢君裴.1984.沙土震动液化.北京:地震出版社.
    鲁人齐,何登发,Suppe J,马晓明,桂宝玲,王明健,高金尉.2010.龙门山中段山前带浅层冲断系统的结构、形成与演化.地质科学,45(4):997~1010.
    罗志立.1991.龙门山造山带岩石圈演化的动力学模式.成都地质学院学报,18(1):1~7.
    乔秀夫,高林志,彭阳.2001.古郯庐带新元古界-灾变、层序、生物.北京:地质出版社,1~128.
    乔秀夫,郭宪璞,叶留生,何碧竹,周玮.2011.新疆塔中卡塔克隆起加里东构造运动的古地震证据.岩石学报,27(1):243~252.
    乔秀夫,郭宪璞.2011.西南天山下侏罗统软沉积物变形研究.地质论评,57(6):761~769.
    乔秀夫,李海兵,王思恩,郭宪璞,司家亮,宗文明.2008.新疆境内费尔干纳断裂早侏罗世走滑的古地震证据.地质学报,82(6):721~730.
    乔秀夫,李海兵.2009.沉积物的地震及古地震效应.古地理学报,11(6):593~610.
    乔秀夫,宋天锐,高林志,彭阳,张传恒,章雨旭.2006.地层中地震记录(古地震).北京:地质出版社,1~263.
    乔秀夫.2002.中朝板块元古宙板内地震带与盆地格局.地学前缘,9(3):141~149.
    王二七,孟庆任,陈智梁,陈良忠.2001.龙门山断裂带印支期左旋走滑运动及其大地构造成因.地学前缘,8(2):375~384.
    王二七,孟庆任.2008.对龙门山中生代和新生代构造演化的讨论.中国科学D辑,地球科学,38(10);1221~1233.
    王国芝,刘树根,赵锡奎.2008.龙门山中段川西前陆盆地初始盆山边界及其变迁.成都理工大学学报(自然科学版),35(4);431~438.
    许志琴,侯立玮,王宗秀.1992.中国松潘-甘孜造山带的造山过程.北京:地质出版社,1~190.
    许志琴,杨经绥,李海兵,嵇少丞,张泽明,刘焰.2011.印度-亚洲碰撞大地构造.地质学报,85(1):1~33.
    许志琴,杨经绥,李海兵,张建新,吴才来.2007.造山的高原——青藏高原的地体拼合、碰撞造山及隆升机制。北京:地质出版社,1~458.
    杨长清,刘树根,曹波,李书兵,李旻.2008.龙门山造山带与川西前陆盆地耦合关系及其对油气成藏的控制.成都理工大学学报(自然科学报),35(4):471~476.
    Burchfiel B C,Chen Z,Liu Y,Royden L H.1995.Tectonics of theLongmen shan and adjacent regions,central China.Int.Geol.Rev.,37:661~735.
    Cao Junxing,Liu Shugen.2008.The Wenchuan earthquake andthoughts on relevant issues.Journal of Chengdu University ofTechnology(Science&Technology Edition),35(4):414~425.
    Deng Bin,Liu Shuogen,Liu Shun,Li Zhiwu,Si Jiantao,Guo BiTian Xiaobin.2010.The structure features of Jiaochang ABelt in Songpan-Garze Fold Belt and its tectonic implicatioGeological Review,56(1):31~42.
    Deng Fei,Jia Dong,Luo Liang,Li Haibin,Li Yiquan,Wu Long.2008.The contrast between provenances of Songpan-Garze andwestern Sichuan Forland Basin in the Late Trassic:Clues to thetectonics and paleogeography.Geological Review,54(4):561~573.
    Deng Kangling.2007.Indosinian peogressive deformation and itchronogenesis in Longmengshan structure belt,Oil&GaGeology,28(4):485~492.
    Deng Qidong,Chen Shefa,Zhao Xiaolin.1994.Tectonics,seismicity and dynamics of Longmenshan Mountains and itsadjacent regions.Seismology and Geology,16(4):389~402.
    Dirks P H G M,Wilson C J L,Chen S.Luo Z L,Liu S.1994.Tectonic evolution of the NE margin of the Tibetan Platcau:evidence from the central Longmen Mountain,Sichuan,China.Journal of Southeast Asian Earth Sciences,9(1-2):181~192.
    Gou Zonghai.1996.Stratigraph feature of the Xujiahe Formation inthe Tianquan-Lushan-Baoxing area,Sichuan.Regional Geologyof China,4:323~329.
    Guiraud M,Plaziat J C.1993.Seismites in the fluviatile BimaSandstone:Identification of paleoseismis and discussion of theirmagnitudes in a Cretaceous synsedimentary strike-slip basin(Upper Benue,Nigeria).Tectonophysics,225(4):493~522.
    Harrowfield M J and Wilson C J L.2005.Indosinian deformation ofthe Songpan-Garze fold belt,northest Tibetan Plateau.Journalof structure Geology,27(1):101~117.
    Jiang Zaixing,Tian Jijun,Chen Guiju,Li Xiazhe,Zhang Manlarg2007.Sedimentary characteristics of the Upper Trassic inwestern Sichuan foreland Basin.Journal of Palaeogeography,9(2):143~154.
    Kuenen P.1958.Experiments in Geology.Trans.Geol.Soc.Glasgow,23:1~28.
    Li Haibing,Si jialiang,Fu Xiaofang,Qiu Zhuli,Li Ning,J,Vander woerd,Pei Junling,Wang Zongxiu,Hou Liwei,WuFuyao.2009Co-seismic rupture and maximum displacement ofthe2008Wenchuan earthquake and its tectonic implications.Quternary Sciences,29(3):387~402.
    Li Yong,He Pei,Yan Zhaokun,Dong Shunli,Tao Xiaofeng.2010.Dynamics of Late Triassic Longmenshan foreland basin,China.Journal of Chengdu University of Technology(Science&Technology Edition),37(4):401~411.
    Li Yong,P.A.Allen,A.L.Densmore,Xu Qiang.2003.Evolution of the Longmenshan Forland Basin(western Sichuan,China)during the Late Trassic Indosinian Orogeny.BasinResearch,15:117~138.
    Li Yong,Zhou Rongjun,A L Densmore,M A Ellis.2006.Geomorphic and sedimentary evidence for reversion of strike slipdirection in Longmenshan fault zone.Mineral Petrol.26(4):26~34.
    Li Yong,Zhou Rongjun,A L Denmore,M A Ellis et al.2006.Continental dynamics and gelological responses of the easternmargin of Qinghai-Tibet Plateau.Beijing:Geological PublishHouse,1~48.
    Li Zhiwu,Chen Hongde,Liu Shugen,Hou Mingcai,Deng Bin.2010.Differential uplift driven by thrusting and its lateralvariation along the Longmenshan belt,western Sichuan,China:Evidence from fission track thermochronology.Chinese JournalGeology,45(4):944~968.
    Li Zhiwu,Liu Shugen,Chen Hongde,Liu Shun,Gou Bing,TianXiaobin.2008.Structural segmentation and zonation anddifferential deformation across and along the Longmen thrustbelt,West Sichuan,China Journal of Chengdo University ofTechnology(Science&Techonlogy Edition),35(4):440~
    Liu Shugen,Li Zhiwu,Cao Junxing,Liu Shun,Den Bin,WangGuozhi,Deng Bin.2009.A-D textural and structurecharacteristics of Longmen intracontinental composite orogenicbelt,southwest China.Chinese Journal of Geology.44(4):1151~1180.
    Liu Shugen,Luo Zhili,Dai Sulan,Arne D,Wilson C J L.1995.The uplift of the Longmenshan thrust belt and subsidence of thewestern Sichuan forland basin.Acta Geologic Sinica,69(3):205~214.
    Liu Shugen,Luo Zhili,Zhao Xikui,Xu Guosheng,Wang Guozhi,Zhang Chengjiang.2003.Coupling relationship of sedimentarybasin-orogenic belt systems and their dynamic models in westChina:A case study of the Longmenshan orogenic belt-westSichuan forland basin systeim.Acta Geologica Sinica,77(2):177~186.
    Liu Shugen.1993.The formation and evolution of LongmenshanThrust Zone,western Sichuan,China.Chengdu:Press ofChendu University of Science and Technology,1~167.
    Liu Ying,Xie Junpei.1984.Sandsoil seismic vibrationalliquefication.Beijing:Seismology Publishing House.
    Lu Renqi,He Dengfa,Suppe J,Ma Xiaoming,Gui Baoling,WangMingjian,Gao Jinwei.2010.The structure formation andevolution of the shallow thrusting in the central LongmenMountains front belt.Chinese Journal Geology,45(4):997~1010.
    Moretti M,Alfaro P,Caselles O,Canas J A.1999,Modellingseismites with a digital shaking table.Tectonophysics,304:369~383.
    Moretti M,Pieri P,Tropeano M.2002.Late Pleistocene softsediment deformation structure interpreted as seismites inparalic deposites in the city of Bari(Apulian forland southernItaly).In Ettensohn F R,Rast N,Brett C E(eds.):AncientSeismites.Geological Society of America,Special Paper,359~85.
    Moretti M,Sabato L.2007.Recognition of trigging mechanisms forsoft-sediment deformation in the Pleistocene lacustrine depositsof the Sant Arcangelo Basin(Southern Italy):Seismic shockvs.overloading.Sedimentary Geology,196:31~45.
    Obermeier S F.1996.Use of liquefaction-induced feature forpaleoseismic analysis-An overview of how seismic liquefactioncan be distinguished from other features and how their regionaldistribution and properties of source sediment can be used toinfer the location and strength of Holocene paleoearthqukes.Engineering Geology,44:1~76.
    Ogg J G,Ogg G,Gradstein M.2008.The concise geologic timescale.Cambridge University Press,New York,1~177.
    Owen G.1995.Soft-sediment deformation in Upper ProtorozoicTorridonian sandstone(Applecross Formation)at Torridon,Northwest Scotland.J.Sediment.Res.A65:495~504.
    Plaziat J.C,Purser B H,Philobbs E.1990,Seismic deformationstructure(seismites)in the syn-rift sediments of the N W RedSea(E-Gypt).Bull.Soc.Geol.France,(8)t.Vl,No3:419~434.
    Qiao Xiufu,Gao Linzhi,Peng Yang.2001.Neoproterozoic in PaleoTanlu Fault Zone-Catastrophe.Sequence.Biostratigraphy.Beijing:Geological Publishing House,1~128.
    Qiao Xiufu,Guo Xianpu,Ye Liushen,He Bizhu,Zhou Wei.2011.Paleoseismic evidence of the Caledonian Movement at kartarkeUplift in the Central Tarim,Xinjiang.Acta Petrologica Sinica,27(1):243~252.
    Qiao Xiufu,Guo Xianpu.2011.Soft-sediment deformationinterpreted as sesmites of the Lower Jurassic in southesternTianshan,Xiajing.Geological Review,57(6):761~769.
    Qiao Xiufu,Li Haibing,Wang Sien,Guo Xianpu,Si Jialiang,ZongWenming.2008.Paleoseismic evidence of the Talas-Ferghanastrike-slip fault during Early Jurassic,Xinjiang.Acta GeologicaSinica,82(6):721~730.
    Qiao Xiufu,Li Haibing.2009.Effect of earthquake and ancientearthquake on sediments.Journal of Paleogeography,11(6):593~610.
    Qiao Xiufu,Song Tianrui,Gao Linzhi,Peng Yang,ZhangChuanheng,Zhang Yuxu.2006.Seismic records in strata(Ancient Earthquakes).Beijing:Geological Publishing House,1~263.
    Qiao Xiufu.2002.Intraplate seismic belt and basin framework ofSino-Karean Plate in Proterozoic.Earth Science Frontiers,9(3):141~149.
    Rodriguez-Pascua M A,De Vicente G.,Calvo J P,Vicete G D,Gomez-Gras D.2000.Soft-sediment deformation structureinterpreted as seismites in lacustrine sediments of the PrebeticZome,SE Spain,and their potential use as indicators ofearthquake magnitude during the Late Miocene.SedimentaryGeology,135:117~135.
    Roep T B,Everts A J.1992.Pillow-beds;A new type of seismites?An examp from an Oligocene turbididite fan complex,Alicante,Spain.Sedimentology,39(5):711~724.
    Roger F,Jolivet M,Malavieille J.2008a.The tectonic evolution ofthe Songpan-Garze(north Tibet)and adjacent areas fromProterozoic to Present:A synthesis.Journal of Asian EarthSciences,39:254~269.
    Roger F,Jolivet M,Malavieille J.2008bTectonic evolution of theTriassic fold belt of Tibet.Comptes Rendus Geosciences,340(2-3):180~189.
    Wang Erqi,Meng Qingren,Chen Zhiliang,Chen Liangzhong.2001.Early Mesozoic left-lateral movement along theLongmenshan fault belt and its tectonic implications.EarthScience Frontiers,8(2):375~384.
    Wang Guozhi,Liu Shugen,Zhao Xikui.2008.The preliminaryboundary of the west Sichuan forland basin and orogenic beltand its migration in central Longmen Mountians,Sichuan,China.Journal of Chengdu University of Technology(Science&Tecchology Edition),35(4):431~438.
    Weislogel A L,Graham S a,Xhang E Z,Wooden J L,Gehrel G E,Yang Hengshu.2006.Detrital Zircon provenance of the LateTrassic Songpan-Ganze(Garze)South China Blocks.Geology,34(2):97~100.
    Xu Z Q,Ji S C,Li H B.2008.Uplift of the Longmen Shan rangeand the Wenchuan earthquake.Episodes,31(3):291~310.
    Xu Zhiqin,Yang Jingsui,Li Haibing,Zhang Jianxin,Wu Cailai.2007.Orogenic Plateaux—Terrane amalgation,collision anduplift in the Qinghai-Tibet Plateau.Beijing:GeologicalPublishing House,1~458.
    Xu Zhiqin,Yang Jingsui,Li Haibing,Ji Shaocheng,Zhang Zeming,Liu Yan.2001.On the Tectonics of the India-Asia collision.Acta Geologic Sinica,85(1):1~33.
    Xu Zhiqing,Hou Liwei,Wang Zhongxiu.1992.Orogenic processesof the Songpan-Garze Orogenic Belt of China.Beijing;Geologiocal Publishing House,1~190.
    Yang Changqing,Liu Shugen,Cao Bo,Li Shubing,Li Min.2008.Basin-range coupling system and it control on oil and gasaccumulation in the Longmen orogenic belt and the WestSichuan forland basin.Journal of Chengdu University ofTechnology(Science&Technology Edition).35(4):471~476.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心