深部构造对吉林省东部火山与深震活动影响
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摘要
通过岩石化学分析手段及地球物理数值模拟方法,分析深部构造对长白山火山岩浆起源和深源地震发震机制的影响,认为长白山火山岩浆起源于地幔源区,并与太平洋板块深部俯冲有关;西太平洋板块深部脱水,产生陆内火山岩浆;俯冲板块的深部脱水产生的裂隙(断裂)可能是长白山区深源地震发震原因,且深源地震与火山作用有一定关联性。
The east area of Jilin Province has a special tectonic position,in which there are Changbai Mountain volcano and deep-focus earthquakes. The Changbai Mountain volcanoes with a high potential eruption possibility,are one of the most dangerous volcano in China,and the deep earthquake region is one and only in China. So,we investigate the influence of deep geological tectonics on the volcano and deep earthquakes,which has important scientific and practical significances of disaster prevention and reduction. The rock lithological analysis and geodynamics numerical simulation were combined to discuss the origin and formation mechanism of volcano and deep earthquakes. The results show that the magma source is mostly close to primitive mantle and the volcanism is related to the slab deep subduction.The Pacific slab deep dehydration is proposed to be the dynamic source of the intra-plate volcanoes. Dehydration faulting formed during the subduction are considered as the feasible formation mechanisms of the deep earthquakes. Besides,we infer that there is a correlation between volcanism and deep earthquakes in the region.
The east area of Jilin Province has a special tectonic position,in which there are Changbai Mountain volcano and deep-focus earthquakes. The Changbai Mountain volcanoes with a high potential eruption possibility,are one of the most dangerous volcano in China,and the deep earthquake region is one and only in China. So,we investigate the influence of deep geological tectonics on the volcano and deep earthquakes,which has important scientific and practical significances of disaster prevention and reduction. The rock lithological analysis and geodynamics numerical simulation were combined to discuss the origin and formation mechanism of volcano and deep earthquakes. The results show that the magma source is mostly close to primitive mantle and the volcanism is related to the slab deep subduction.The Pacific slab deep dehydration is proposed to be the dynamic source of the intra-plate volcanoes. Dehydration faulting formed during the subduction are considered as the feasible formation mechanisms of the deep earthquakes. Besides,we infer that there is a correlation between volcanism and deep earthquakes in the region.
引文
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[29]Basu A R,Junwen W,Wankang H,et al.Major element,REE,and Pb,Nd and Sr isotopic geochemistry of Cenozoic volcanic rocks of eastern China:implications for their origin from suboceanic-type mantle reservoirs[J].Earth and Planetary Science Letters 105,1991:149-169.
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[31]Choi S H,Mukasa S B,ZHOU X H,et al.Mantle Dynamics beneath East Asia Constrained by Sr,Nd,Pb and Hf Isotopic Systematics of Ultramafic Xenoliths and Their Host Basalts from Hannuoba,North China[J].Chem.Geol.,2008,248:40-61.
[32]Zartman R E,Doe B R.Plumbotectonics-the model[J].Tectonophysics,1981,75:135-162.
[33]Munker C.Nb/Ta fractionation in a Cambrian arc back arc system.New Zealand:source constraints and application of refined ICPMS techniques[J].Chemical Geology,1998,144(112):23-45.
[34]Rudnick R L,Barth M,Horn I,et al.Rutile bearing refractory eclogites:missing link between continents and depleted mantle[J].Science,2000,287:278-28l.
[35]Kamber B S,Ewart A,Collerson K D,et al.Fluid-mobile trace element constraints on the role of slab melting and implications for Archaean crustal growth models[J].Contributions to Mineralogy and Petrology,2002,144(1):38-56.
[36]Duggen S,Portnyagin M,Baker J.Drastic shift in lava geochemistry in the volcanic-front to rear-arc region of the Southern Kamchatkansubduction zone:Evidence for the transition from slab surface dehydration to sediment melting[J].Geochimicaet Cosmachimica Acta,2007,7l:452-480.
[37]Stolz A J,Joehum K P,Spettel B.,et al.Fluid-and melt-related enrichment in the subarc mantle:evidence from Nb/Ta variations in island arc basalts[J].Geology,1996,24(7):587-590.
[38]Münker,C.Nb/Ta fractionation in a Cambrian arc back arc system.New Zealand:source constraints and application of refined ICPMS techniques[J].Chemical Geology,1998,l44(1):23-45.
[2]SUN Chunqing,Plunkett Gill,LIU Jiaqi,et al.Ash from Changbaishan Millennium eruption recorded in Greenland ice:Implications for determining the eruption’s timing and impact[J].Geophysical Research Letters,2014:692-701,10.1002/2013GL058642.
[3]CHU K S,Tsuji Y,Baag C E,et al.Volcanic eruptions of Mt.Baekdu(Changbai)occurring in historical times[J].Bull Earthq Res Inst Univ Tokyo,2011,861:1-27.
[4]Stone R.Vigil at North Korea’s Mount Doom[J].Science,2011,334:584-588.
[5]XU J,PAN B,LIU T,et al.Climatic impact of the Millennium eruption of Changbaishan volcano in China:New insights from high-precision radio carbon wiggle-match dating[J].Geophysical Research Letters,2013,40:54-59.
[6]WEI H Q,LIU G,Gill J.Review of eruptive activity at Tianchi volcano,Changbaishan,northeast China:Implications for possible future eruptions[J].Bulletin of Volcanology,2013,75(4):1-14.
[7]吴建平,明跃红,苏伟,等.长白山火山区壳幔S波速度结构研究[J].地震地质,2009,31(4):584-597.
[8]刘国明,张恒荣,孔庆军.长白山天池火山区的地震活动特征分析[J].地震地质,2006,28(3):503-508.
[9]杨景奎.深源地震与火山活动关系初探[J].科技资讯,2011,5:219-220.
[10]田有,赵大鹏,刘财,等.长白山火山深部结构特征及其意义[J].北京:中国地球科学联合学术年会,2014:1740.
[11]高山泰,于岫嵋,朱大庆,等.1597年10月6日中国东部的振动事件是一次深源强震[J].地震学报,2003,25(3):324-330.
[12]ZHANG J H,GAO S,Ge W C,et al.Geochronology of the Mesozoic volcanic rocks in the Great Xing’an Range,northeastern China:Implications for subduction-in-duced delamination[J].Chemical Geology,2010,276:144-165.
[13]刘嘉麒.中国火山[M].北京:科学出版社,1999:l3-111.
[14]Turcotte D L,Schubert G.Geodynamics[M].Cambridge:Cambridge University Press,2002.
[15]CHEN Y,ZHANG Y,Graham D,et al.Geochemistry of Cenozoic basalts and mantle xenoliths in Northeast China[J].Lithos,2007,96(1-2):108-126.
[16]SHENG J,LIAO J,Gerya J.Numerical modeling of deep oceanic slab dehydration:implications for the possible origin of far field intra-continental volcanoes in northeastern China[J].Journal of Asian Earth Science,2016,117:328-336.
[17]MA Hanrui,SHENG Jian,YANG Qingfu.A Study on the Magma Origin of the Changbai Mountain Volcano Based on Lithological A-nalysis[J].International Journal of Simulation Systems,Science&Technology,2016,17(45):261-264.
[18]段永红,张先康,刘志,等.长白山-镜泊湖火山区地壳结构接收函数研究[J].地球物理学报,2005,48(2):352-358.
[19]HUANG J L,ZHAO D P.High-resolution mantle tomography of China and surrounding regions[J].J.Geophys Res.,2006,111:B09305.
[20]张凤鸣,张亚江,许晓艳,等.日本海西部-中国东北深震区俯冲运动对东北地区浅源地震的动力作用[J].东北地震研究,2007,23(1):33-39.
[21]马铭志,刘铁男,李雪梅,等.吉林深震的构造背景和区域地震能量的异常讨论[J].大地震地磁与观测,2006,27(S1):11-16.
[22]SHEN X Z and ZHOU H L.The low-velocity layer at the depth of620km beneath Northeast China[J].Chinese Science Bulletin,2009,54(17):3067-3075.
[23]Raleigh C B,Paterson M S.Experimental deformation of serpentinite and its tectonic implications[J].J Geophys Res,1965,70:3965-3985.
[24]Karato S I,Riedel M R,Yuen D A.Rheological structure and deformation of subducted slabs in the mantle transition zone:Implications for mantle circulation and deep earthquakes[J].Physics of the Earth and Planetary Interiors,2001,127:83-108.
[25]Green H W.Tiny triggers deep down[J].Nature,2003,424(6951):893-894.
[26]赵素涛,金振民,干薇.中国东北深源地震机理[J].地学前缘,2012,19(5):301-311.
[27]Gerya T V,Yuen D A.Robust characteristics method for modelling multiphase visco-elasto-plastic thermo-mechanical problems[J].Physics of the Earth and Planetary Interiors,2007,163(114),83-105.
[28]FAN Q C,Hooper PR.The Cenozonic basaltic rocks of eastern China:Petrology and Chemical composition[J].Petrology,1991,32:765-810.
[29]Basu A R,Junwen W,Wankang H,et al.Major element,REE,and Pb,Nd and Sr isotopic geochemistry of Cenozoic volcanic rocks of eastern China:implications for their origin from suboceanic-type mantle reservoirs[J].Earth and Planetary Science Letters 105,1991:149-169.
[30]ZOU H,Zindler A,XU X,et al.Major,trace element,and Nd,Sr and Pb isotope studies of Cenozoic basalt in SE China:mantle source,regional variations,and tectonic significance[J].Chemical Geology,2000,171:33-47.
[31]Choi S H,Mukasa S B,ZHOU X H,et al.Mantle Dynamics beneath East Asia Constrained by Sr,Nd,Pb and Hf Isotopic Systematics of Ultramafic Xenoliths and Their Host Basalts from Hannuoba,North China[J].Chem.Geol.,2008,248:40-61.
[32]Zartman R E,Doe B R.Plumbotectonics-the model[J].Tectonophysics,1981,75:135-162.
[33]Munker C.Nb/Ta fractionation in a Cambrian arc back arc system.New Zealand:source constraints and application of refined ICPMS techniques[J].Chemical Geology,1998,144(112):23-45.
[34]Rudnick R L,Barth M,Horn I,et al.Rutile bearing refractory eclogites:missing link between continents and depleted mantle[J].Science,2000,287:278-28l.
[35]Kamber B S,Ewart A,Collerson K D,et al.Fluid-mobile trace element constraints on the role of slab melting and implications for Archaean crustal growth models[J].Contributions to Mineralogy and Petrology,2002,144(1):38-56.
[36]Duggen S,Portnyagin M,Baker J.Drastic shift in lava geochemistry in the volcanic-front to rear-arc region of the Southern Kamchatkansubduction zone:Evidence for the transition from slab surface dehydration to sediment melting[J].Geochimicaet Cosmachimica Acta,2007,7l:452-480.
[37]Stolz A J,Joehum K P,Spettel B.,et al.Fluid-and melt-related enrichment in the subarc mantle:evidence from Nb/Ta variations in island arc basalts[J].Geology,1996,24(7):587-590.
[38]Münker,C.Nb/Ta fractionation in a Cambrian arc back arc system.New Zealand:source constraints and application of refined ICPMS techniques[J].Chemical Geology,1998,l44(1):23-45.