鲁西枣庄—临沂地区新元古界震碛岩的主要特征
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摘要
鲁西枣庄—临沂地区新元古界碳酸盐岩系中,发育有由地震造成的同沉积构造现象,如微晶方解石脉、层内变形褶曲、层内微断层和内碎屑碳酸盐岩堆积等。野外实地观察、地质剖面测量和室内分析研究认为它们是由地震产生的强震动,使距震中一定范围的未固结沉积物经震动液化,震动变形形成的震积岩组合。根据其发育规律与组合特征,该地区震碛岩的形成应与古郯庐断裂在新元古代的活动密切相关。可初步确定为含有A、B和C3个震积岩单元的震动液化地震序列。
The synsedimentary structures which was created by earthquakes, such as the crystallitic calcite veins, intraformational folds, intrastratal micro-faults, intraclast carbonate rocks and so on, were well developed in the Neoproterozoic carbonate rock series in Zaozhuang-Linyi area, western Shandong. Based on field observation, geological section survey and laboratory study, these phenomena of synsedimentary structures were thought to be results of strong vibration resulted from the earthquakes, and the combinations of vibration and accumulation rocks were formed in adjacent area of the epicenter by vibration liquefaction and vibration distortion in unconsolidated rocks. In the light of this mechanism, seven types of seismites were described and the seismic succession by vibrational liquefaction including three vibration and accumulation units (A, B and C) was set up. The formation of vibration and accumulation rocks should be closely related to activities of the paleo-Tan-Lu fault.
The synsedimentary structures which was created by earthquakes, such as the crystallitic calcite veins, intraformational folds, intrastratal micro-faults, intraclast carbonate rocks and so on, were well developed in the Neoproterozoic carbonate rock series in Zaozhuang-Linyi area, western Shandong. Based on field observation, geological section survey and laboratory study, these phenomena of synsedimentary structures were thought to be results of strong vibration resulted from the earthquakes, and the combinations of vibration and accumulation rocks were formed in adjacent area of the epicenter by vibration liquefaction and vibration distortion in unconsolidated rocks. In the light of this mechanism, seven types of seismites were described and the seismic succession by vibrational liquefaction including three vibration and accumulation units (A, B and C) was set up. The formation of vibration and accumulation rocks should be closely related to activities of the paleo-Tan-Lu fault.
引文
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闫臻,杨长春,李继亮,肖文交,王真理,徐兴旺.2005.山东济南和新泰馒头组中浊积岩和滑塌堆积的基本特征及其大地构造意义.地质科学,40(4):579—584.YanZhen,YangChangchun,LiJiliang,XiaoWenjiao,WangZhenliandXuXingwang.2005.FeaturesofturbiditesandolistostromeintheMantouFormationinJinanandXintai,Shandong,anditstectonicsignificance.ChineseJour.Ge-ol.,40(4):579—584.
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陈世悦,袁文芳,鄢继华.2003.济阳坳陷早第三纪震积岩的发现及其意义.地质科学,38(3):377—384.ChenShiyue,YuanWenfangandYanJihua.2003.DiscoveryandsignificanceofearthquakeeventdepositsofEarlyTertiaryintheJiyangDepression.ChineseJour.Geol.,38(3):377—384.
洪天求贾志海郑文武李双应.2004.宿州地区震旦系望山组主要沉积类型及其形成环境分析.吉林大学学报(地球科学版),34(1):5—11.HongTianqiu,JiaZhihai,ZhengWenwuandLiShuangying.2004.TheanalysisofthedepositionaltypesandtheenvironmentsoftheWangshanFormationofSinianinSuzhouarea,AnhuiProvince.JournalofJilinUniversity(EarthSci.Ed.),34(1):5—11.
刘鸿允,郝杰,李曰俊,等.1999.中国中东部晚前寒武纪地层与地质演化.北京:科学出版社.7—59.LiuHongyun,HaoJie,LiYuejun,etal.1999.TheLatePrecambrianStrataandGeologicalEvolutionofCentral-EasternChi-na.Beijing:SciencePress.7—59.
潘国强,刘家润,孔庆友,吴俊奇,张庆龙,曾家湖,刘道忠.2000.徐宿地区震旦纪地质事件及其成因讨论.高校地质学报,6(4):566—575.PanGuoqiang,LiuJiarun,KongQingyou,WuJunqi,ZhangQinglong,ZengJiahuandLiuDaozhong.2000.StudyonSiniangeologiceventsinXuzhou-Suzhouareaanddiscussionontheirorigin.GeologicalJournalofChinaUniversities,6(4):566—575.
乔秀夫.1996.中国震积岩的研究与展望.地质论评,42(4):317—320.QiaoXiufu.1996.StudyofseismitesofChinaanditsprospects.Geol.Rev.,42(4):317—320.
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.QiaoXiufu.2002.IntraplateseismicbeltandbasinframeworkofSino-KoreanplateinProterozoic.EarthScienceFrontiers,9(3):141—149.
乔秀夫,高林志.1999.华北中-新元古代及早古生代地震灾变事件及与Rodinia的关系.科学通报,44(16):1753—1758.QiaoXiufuandGaoLinzhi.1999.EarthquakeeventsinNeoproterozoicandEarlyPaleozoicanditsrelationshipwithsupercon-tinentRodiniainNorthChina.ChineseSci.Bull.,44(16):1753—1758.
乔秀夫,张安棣.2002.华北块体、胶辽朝块体与郯庐断裂.中国地质,11(4):337—345.QiaoXiufuandZhangAndi.2002.NorthChinaBlock,Jiaoliao-KoreaBlockandTancheng-Lujiangfaultzone.GeologyinChi-na,11(4):337—345.
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—122.QiaoXiufu,GaoLinzhiandPengYang.2001.NeoproterozoicinPaleo-TanluFaultZone———Catastrophe,Sequence,Bios-tratigraphy.Beijing:GeologicalPubl.House.1—122.
乔秀夫,李海兵,高林志.1997.华北地台震旦纪—早古生代地震节律.地学前缘,4(3):155—160.QiaoXiufu,LiHaibingandGaoLinzhi.1997.Sinina—EarlyPaleozoicseismicrhythmsontheNorthChinaplatform.EarthScienceFrontiers,4(3):155—160.
乔秀夫,宋天锐,高林志,彭阳,李海兵,高劢,宋彪,张巧大.1994.碳酸盐岩振动液化地震序列.地质学报,68(1):16—34.QiaoXiufu,SongTianrui,GaoLinzhi,PengYang,LiHaibing,GaoMai,SongBiaoandZhangQiaoda.1994.Seismicsequenceincarbonaterocksbyvibrationalliquefaction.ActaGeologicaSinica,68(1):16—34.
乔秀夫宋天锐李海兵高林志.1996.辽东半岛南部震旦系—下寒武统成因地层.北京:科学出版社.10—96.QiaoXiufu,SongTianrui,LiHaibingandGaoLinzhi.1996.GeneticStratigraphyoftheSinianandLowerCambrianStratainSouthLiaoningProvince.Beijing:SciencePress.10—96.
宋天锐.1988.北京十三陵前寒武纪碳酸盐岩地层中的一套可能的地震—海啸序列.科学通报,33(8):609—611.SongTianrui.1988.Apossibleseismic-tsunamisequenceinPrecambriancarbonatestratigraphyinShisanlingarea,Beijing.ChineseSci.Bull.,33(8):609—611.
田洪水,张增奇.2006.山东安丘地区郯庐断裂带古近纪冲积物震积岩序列.地质科学,41(2):208—216.TianHongshuiandZhangZengqi.2006.SeismitesuccessionofthePaleogenealluviumalongtheTancheng-LujiangfaultzoneinAnqiuarea,Shandong.ChineseJour.Geol.,41(2):208—216.
闫臻,杨长春,李继亮,肖文交,王真理,徐兴旺.2005.山东济南和新泰馒头组中浊积岩和滑塌堆积的基本特征及其大地构造意义.地质科学,40(4):579—584.YanZhen,YangChangchun,LiJiliang,XiaoWenjiao,WangZhenliandXuXingwang.2005.FeaturesofturbiditesandolistostromeintheMantouFormationinJinanandXintai,Shandong,anditstectonicsignificance.ChineseJour.Ge-ol.,40(4):579—584.
FairchildIJ,EinseleGandSongTianrui.1997.PossibleseismicoriginofmolartoothstructuresinNeoproterozoiccarbonaterampdeposits,NorthChina.Sedimentology,44:611—636.
SeilacherA.1991.Eventsandtheirsignatures:anoverview.in:EinseleG,RickenWandSeilacherA.eds.CyclesandE-ventsinStratigraphy.Berlin:Springer-Verlag.220—226.
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