山东临朐红丝石层中的古地震事件记录
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摘要
红丝石是产于山东临朐中奥陶统下部的一类具红色丝线状弯曲纹层的用于加工工艺品(砚台、笔筒等)的微晶碳酸盐岩。产有红丝石的这部分地层,厚约60m,被称为“红丝石层”。根据野外观测、室内鉴定及地震地质对比,从临朐红丝石层中识别出了具卷曲变形(包括塑性和半塑性变形)、环形纹层变形、微断裂(包括阶梯状和共轭微断裂)、震裂隙和震碎角砾等地震成因岩石构造的震积岩层。这些震积岩是中奥陶世古地震事件的记录,红丝石仅是古地震作用形成的一种常见的震积岩,由于在中奥陶世郯庐带内也有震积岩生成,因此认为这些地震记录是古郯庐带在中奥陶世强烈活动的证据。
Red-silk stone is a kind of microcrystalline carbonate rocks with red silk thread-like curled laminations used for carving stone handicrafts (ink slabs, brush pots etc.), which occurs in the lower part of the Middle Ordovician in Linqu, Shandong. The portion of strata containing red-silk stone, about 60 m thick, is named "red silk stone bed". Based on field observation, lab examination correlation of seismic structures, seismite layers with seismogenetic structures such as curl deformation (including plastic and semi-plastic deformations), circular laminations, microfractures (including ladder and conjugated ones), vibration fissures and shattered breccia are recognized in the red-silk stone bed. These seismites are records of Middle Ordovician paleseismic events. Red-silk stone is only one of common seismites formed by paleoseismism. As seismites also formed in the Middle Ordovician Tanlu zone, it is considered that these seismic records are evidence of the intense tectonic activity of the Paleo-Tanlu fault at that time.
Red-silk stone is a kind of microcrystalline carbonate rocks with red silk thread-like curled laminations used for carving stone handicrafts (ink slabs, brush pots etc.), which occurs in the lower part of the Middle Ordovician in Linqu, Shandong. The portion of strata containing red-silk stone, about 60 m thick, is named "red silk stone bed". Based on field observation, lab examination correlation of seismic structures, seismite layers with seismogenetic structures such as curl deformation (including plastic and semi-plastic deformations), circular laminations, microfractures (including ladder and conjugated ones), vibration fissures and shattered breccia are recognized in the red-silk stone bed. These seismites are records of Middle Ordovician paleseismic events. Red-silk stone is only one of common seismites formed by paleoseismism. As seismites also formed in the Middle Ordovician Tanlu zone, it is considered that these seismic records are evidence of the intense tectonic activity of the Paleo-Tanlu fault at that time.
引文
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[22]梁定益,聂泽同,万晓樵.试论震积岩及震积不整合--以川西、滇西地区为例[J].现代地质,1991,5(2):138～147.Liang D ingyi,N ie Zetong,W an X iaoqiao.O n the seism ites and seism o-diconform ity-take the W.Sichuan and W.Yunnan regions asan exam pie[J].G eoscience,1991,5(2):138～147(in C hinese w hth English abstract).
[23]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[J].沉积学报,1992,10(3):19～24.W u X iantao,Y in G uoxun.D iscovery and significance of seism ite of lake deposition of Late Jurassicin Erm ei in Sichuan[J].Acta Sedim entologica Sinica,1992,10(3):19～24(in C hinese w ith English abstract).
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[2]乔秀夫,高林志,彭阳.古郯庐带新元古界—灾变·层序·生物[M].北京:地质出版社,2001.1～122.Q iao X iufu,G ao Linzhi,Peng Y ang.N eoproterozoicn Paleo-Tancheng-Lujiang Fault Zone C atastrophe·Sequences·Biostratigraphy[M].Beijing:G eologicalPublishing H ouse,2001.1～122(in C hinese).
[3]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[J].中国科学(D辑),2001,31(11):911￣917.Q iao xiufu,G ao Linzhi,Peng Yang,et al.Seism ic events,sequence and significance in C anglangpu Stage in Paleo-Tanlu FaultZone[J].Science in C hina(SeriesD),2001,31(11):911～917(in C hinese).
[4]乔秀夫,高林志.华北中新元古代及早古生代地震灾变事件及与R odinia的关系[J].科学通报,1999,44(16):1753～1758.Q iao X iufu,G ao Linzhi.Earthquake eventin N eoproterozoic and Early Paieozoic and itsrelationship w ith supercontinentalR odinia in N orth C hina[J].C hinese Science Bulletin,1999,44(16):1753～1758(in C hinese).
[5]田洪水,万中杰,王华林.鲁中寒武系馒头组震积岩的发现及初步研究[J].地质论评.2003,49(2):123～131.Tian H ongshui,W an Zhongjie,W ang H ualin.D iscovery and prelim inary study on seism ites of the C am brian M antou Form ation in the centralShandong area[J].G eologicalR eview,2003,49(2):123～131(in C hinese w ith English abstract).
[6]宋明春,张成基,王来明,等.山东省第二轮区域地质调查主要进展[J].山东地质,2001,17(2):13.Song M ingchun,Z hangchenji,W anglaim ing,et al.R eview of regional geological survey in Shandong Province[J].G eology of Shandong,2001,17(2):13(in Chinese w ith English abstract).
[7]迟元林,钟建华,周瑶琪,等.安徽巢北早三叠世南陵湖灰岩中的灰涌构造及其成因意义[J].岩石学报,1999,15(1):137～144.C hiY uanlin,Zhong Jianhua,Z hou Yaoqi,etal.The lim e blow in the N anlinghu lim estone ofEarly Triassic period in N orth C haohu,Anhui:Its genesis and significance[J].Acta Petrologica Sinica,1999,15(10):137～144(in C hinese w ith English abstract).
[8]陈世悦,袁文芳,鄢继华.济阳坳陷早第三纪震积岩的发现及意义[J].地质科学,2003,38(3):413～424.C hen Shiyue,Y uan W enfang,Y an Jihua.D iscovery and significance of earthquake event deposits of Early Tertiary in the Jiyang depression[J].C hinese Journalof G eology,2003,38(3):413～424(in C hinese w ith English abstract).
[9]袁静.山东惠民凹陷古近纪震积岩的特征及其地质意义[J].沉积学报,2004,22(1):41～46.Y uan Jing.The property and geologicalsignificance ofseism ites of Paleogene in H uim ib sag,Shandong Province[J].Acta Sedim entologica Sinica,2004.,22(1):41～46(in C hinese w ith English abstract).
[10]田洪水,王金光,吕明英,等.山东安丘古近纪冲积层中的地震记录[J].沉积学报,2005,23(3):447～453.Tian H ongshui,W ang Jinguang,LüM ingying,etal.Seism ic records in Paleogene alluvial layers in Anqiu,Shandong[J].Acta Sedim entologica Sinica,2005,23(3):444～453(in C hinese w ith English abstract).
[11]徐孟军.山东奇石[M].济南:济南出版社,2004.37～38.X u M engjun.M arvellous Stones of Shandong[M].Jinan:Jinan Press,2004.37～38(in C hinese).
[12]山东省地质矿产局.山东省区域地质志[M].北京:地质出版社,1991.105～122.Bureau ofG eology and M ineralR esourcesofShandong Province.R egional G eology of Shandong Province[M].Beijing:G eology Publishing H ouse,1991.105～122(in C hinese).
[13]张增奇,刘明渭.山东省岩石地层[M].武汉:中国地质大学出版社,1996.109～158.Zhang Z engqi,Liu M ingw ei.Stratigraphy(lithostratic)ofShandong Province[M].W uhan:C hina U niyersity of G eosciences Press,1996.109～158(in C hinese).
[14]杜远生,张传恒,韩欣,等.滇中中元古代昆阳群的地震事件沉积及其地质意义[J].中国科学(D辑),2001,31(4):283～290.D u Y uansheng,Z hang C huanheng,H an X in,et al.Earthquake event deposits in M esoproterozoic Kunyang G roup in central Y unnan and its geologic im plications[J].Sciencesin C hina,(Series D),2001,31(4):283～290(in Chinese).
[15]段吉业,刘鹏举,万传彪.华北燕山中-新元古代震积岩系列及其地震节律[J].地质学报,2002,74(4):441～444.D uan Jiye,Liu Bengju,W an Chuanbiao.M esoproterozoic and N eoproterozoic seism ite and itsrhythm in the Yanshan area,N orth C hina Platform[J].Acta G eologica Sinica,2002,74(4):441～444(in C hinese w hth English abstract).
[16]R odriguez-Pascua M A,C alvo J P,D e Vicente,et al.Soft-sedem ent deform ation structures interpreted as seism ites in lacustrine sedim ents of the Prebetic Zone,SE Spain,and their potentialuse asindicatorsofearthquake m agnitudesduring the Late M iocene[J].Sedim entary G eology,2000,135:117～135.
[17]R ossettiD F,G oesA M.D eciphering the sedim entologicalim print of paleoseism ic events:an exam ple from the Aptian C odo Form ation,northern Brazil[J].Sedim entary G eology,2000.135:137～156.
[18]Plazait J C,Purser B H,Philobbos E.Seism ites deform ation structures(seism ite)in the syn-riftsedim entsofthe N W R ed Sea(Egypt)[J].Bull.Soc.G ed.France,1990,(8):419～434.
[19]Seilacher A.Sedim entary structures tentatively attributed to seism icevents[J].M arG eol,1984,55(1):1～12.
[20]梁定益,聂泽同,宋志敏.再论震积岩及震积不整合--以川西、滇西地区为例[J].地球科学,1994,19(6):845～850.Liang D ingyi,N ie Zetong,Song Zhim in.A study on seism itesand seism o-unconform ity:Taking w estern Sichuan and w estern Y unnan as an exam ple[J].Earth Science,1994,19(6):845～850(in C hinese w ith English abstract).
[21]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[J].现代地质,1995,9(3):1～27.Sun X iaom eng,Liang D ingyi,N ie Z etong.Seism ite sequence in continental m argin-Taking seism ite in m iddle region of Jinsha R iverasan exam ple[J].G eoscience,1995,9(3):1～27(in C hinese w hth English abstract).
[22]梁定益,聂泽同,万晓樵.试论震积岩及震积不整合--以川西、滇西地区为例[J].现代地质,1991,5(2):138～147.Liang D ingyi,N ie Zetong,W an X iaoqiao.O n the seism ites and seism o-diconform ity-take the W.Sichuan and W.Yunnan regions asan exam pie[J].G eoscience,1991,5(2):138～147(in C hinese w hth English abstract).
[23]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[J].沉积学报,1992,10(3):19～24.W u X iantao,Y in G uoxun.D iscovery and significance of seism ite of lake deposition of Late Jurassicin Erm ei in Sichuan[J].Acta Sedim entologica Sinica,1992,10(3):19～24(in C hinese w ith English abstract).
[24]Felix M.G radstein,Jam es G.O gg,Alan G.Sm ith,et al.A new G eologic Tim e Scale,w ith special reference to Precam brian and N eogene[J].Episodes,2004,22(2):83～100.
[25]乔秀夫,李海兵,高林志.华北地台震旦纪—早古生代地震节律[J].地学前缘,1997,4(3～4):155～160.Q iao X iufu,Li H aibing,G ao Linzhi.Sinian-Early Paleozoic seism ic rhythm s on the N orth China Platform[J].Earth Science Frontiers,1997,4(3～4):155～160(in C hinese w ith English abstract).
[26]赵明华,俞晓.土力学与基础工程[M].武汉:武汉理工大学出版社,2003.36～37.Zhao M inghua,Y u X iao.Soil m echanics and foundation engineering[M].W uhan:W uhan U niversity of Science and Technology Press,2003.36～37(in C hinese).
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