利用垂直形变资料分析龙岗火山的活动性
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摘要
首先分析了龙岗火山区及其附近20多年来5条水准路线所反映的垂直形变背景场情况,发现相对于长春基准点,长白山区东部和北部地区主要表现为大面积下沉运动,而龙岗火山区则表现为相对上升运动;然后分析了龙岗火山区主要隆起区垂直形变场变化以及剪切和张裂变形率变化,所得结果均反映了长抚线发生了较明显的活动;最后运用改进的Mogi模型,采用L曲线法反演了主要隆起区可能的压力源参数。结果表明,龙岗火山区岩浆的位置在42.1°N,126.5°E附近,与深地震测深研究结果近似。相对于长白山天池火山,压力源等效半径变化较大,达到183m左右,源的深度在30km左右,相对较深。
Firstly we analyze the vertical deformation rates of five leveling lines in more than twenty years in Longgang volcano region.The reates at the stations are calculeted relative to the Changchun fiducial position.The large area in the east and the north of the Changbaishan mountain is subsiding but the sites in the Longgang is rising.Then we analyze the vertical rate and the vertical strain in the main swollen region.Both of them show that the rate of the Fusong-Jilin leveling line is the biggest.At last,the source parameters are inversed by using the improved Mogi model.The data is analyzed mainly in the swollen region.The inversion method is L-curve.The location of the source is 42.1°N,126.5°E,that is the same as the result from the deep seimic sounding investigation.The equivalent radius of the pressure source is about 183 m,bigger than Tianchi volcano in Changbaishan Mountain.The depth is about 30 km,which is deeper than Tianchi volcano too.
Firstly we analyze the vertical deformation rates of five leveling lines in more than twenty years in Longgang volcano region.The reates at the stations are calculeted relative to the Changchun fiducial position.The large area in the east and the north of the Changbaishan mountain is subsiding but the sites in the Longgang is rising.Then we analyze the vertical rate and the vertical strain in the main swollen region.Both of them show that the rate of the Fusong-Jilin leveling line is the biggest.At last,the source parameters are inversed by using the improved Mogi model.The data is analyzed mainly in the swollen region.The inversion method is L-curve.The location of the source is 42.1°N,126.5°E,that is the same as the result from the deep seimic sounding investigation.The equivalent radius of the pressure source is about 183 m,bigger than Tianchi volcano in Changbaishan Mountain.The depth is about 30 km,which is deeper than Tianchi volcano too.
引文
崔笃信,王庆良,李克,等,2007.长白山天池火山近期形变场演化过程分析[J].地球物理学报,50(6):1731-1739.
陈运泰,黄立人,林邦惠,等1979.用大地测量资料反演的1976年唐山地震的位错模式[J].地球物理学报,22(3):201-216.
段永红,张先康,杨卓新,等.2003.长白山天池火山区基底结构研究[J].地震地质,25(3):501-508.
樊祺诚,隋建立,刘若新,等.2002.吉林龙岗第四纪火山活动分期[J].岩石学报,18(4):495-500.
樊祺诚,隋建立,王团华,等.2007.长白山活动历史、岩浆演化与喷发机制探讨[J].高校地质学报,13(2):175-190.
国家测绘总局.国家水准测量规范[S].1974.北京:测绘出版社.
国家测绘总局.一、二、三、四等水准测量细则[S].1958.北京:测绘出版社.
国家地震局.大地形变测量规范[S].1983.北京:地震出版社.
胡亚轩,施行觉,王庆良,等.2003.腾冲火山区地表垂直形变分析[J].大地测量与地球动力学,23(2):37-41.
胡亚轩,王庆良,崔笃信,等.2007b.Mogi模型在长白山天池火山区的应用[J].地震地质,29(1):144-151.
胡亚轩,王庆良,崔笃信,等.2007a.用形变资料分析腾冲火山区岩浆的活动特征[J].地震研究,30(2):164-168.
刘尔义.1990.吉林省龙岗火山群地质构造特征研究[J].中国区域地质.(2):157-165.
施行觉,胡亚轩,毛竹,等.2005.以垂直形变资料反演腾冲火山区岩浆活动性的初步研究[J].地震研究,28(3):256-261.
王凯红,纪春华,王秀萍.2004年敦密断裂带的地质特征及演化[J].吉林地质,23(4):23-27.
王勇.1996.粘弹性半空间内膨胀引起的地表垂直位移和重力的变化[J].地壳形变与地震,16(2):8-11.
王振杰.2006.测量中不适定问题的正则化解法[M].北京:科学出版社.
徐德兵,白志达,张秉良,等,2005.吉林龙岗火山碎屑基浪堆积特征与成因机理[J].沉积学报,23(1):60-66.
许才军,李志才.2003.轮回搜索——贝叶斯法及其在大地测量反演中的应用[J].武汉大学学报(信息科学版),28(6):658-662.
张成科,张先康,赵金仁,等.2002.长白山天池火山区及邻近地区壳幔结构探测研究[J].地球物理学报,45(6):812-820.
张先康,张成科,赵金仁,等.2002.长白山天池火山区岩浆系统深部结构的深地震测深研究[J].地震学报,24(2):135-143.
Berrino G,Corrado G,Luogo G,et al.1984.Ground deformation andgravity changes accompanying the1982Pozzuoli uplift[J].BullVolcanol,47(2):187-200.
Decker R W,Koyanagi R Y,Dvorak J J,et al.1983.Seismicity andsurface deformation on Mauna Loa volcano,Hawaii[J].EOS,64(37):545-547.
Hansen P C,O Leary D P.1993.the use of the L-curve in the regulariza-tion of discrete ill-posed Problems[J],SIAM J Sci Comput,14(6):1487-1503.
Hansen P C.1992.Analysis of discrete Ill-posed Problems by means ofthe L-curve[J].SIAMReview,34(4):561-580.
Mogi K.1958.Relation between eruptions of various volcanoes and the de-formations of the ground surfaces around them[J].Bull EarthqRes Inst,36:99-134.
Okada Y.1985.Surface deformation due to shear and tensile faults in ahalf-space[J].BSSA,75(4):1135-1154.
Yang X,Davis P M,Jarnies H D.1988.Deforrtion from inflation of adipping finite prolate spheroid in an elastic half-space as a modelforvolcanic stressing[J].JGR,93(85):4249-4257.
Yang X,Davis P M,Delaney P Tet al.1992.Geodetic analysis of dikeintrusion and motion of the magma reservoir beneath the summit ofKilauea volcano,Hawaii1970-1985[J].Geophys Res.97(B3):3305-3324.
Yokoyama I.1971.A model for the crustal deformations around volcanoes[J].J Phys Earth,19(3):199-207.
陈运泰,黄立人,林邦惠,等1979.用大地测量资料反演的1976年唐山地震的位错模式[J].地球物理学报,22(3):201-216.
段永红,张先康,杨卓新,等.2003.长白山天池火山区基底结构研究[J].地震地质,25(3):501-508.
樊祺诚,隋建立,刘若新,等.2002.吉林龙岗第四纪火山活动分期[J].岩石学报,18(4):495-500.
樊祺诚,隋建立,王团华,等.2007.长白山活动历史、岩浆演化与喷发机制探讨[J].高校地质学报,13(2):175-190.
国家测绘总局.国家水准测量规范[S].1974.北京:测绘出版社.
国家测绘总局.一、二、三、四等水准测量细则[S].1958.北京:测绘出版社.
国家地震局.大地形变测量规范[S].1983.北京:地震出版社.
胡亚轩,施行觉,王庆良,等.2003.腾冲火山区地表垂直形变分析[J].大地测量与地球动力学,23(2):37-41.
胡亚轩,王庆良,崔笃信,等.2007b.Mogi模型在长白山天池火山区的应用[J].地震地质,29(1):144-151.
胡亚轩,王庆良,崔笃信,等.2007a.用形变资料分析腾冲火山区岩浆的活动特征[J].地震研究,30(2):164-168.
刘尔义.1990.吉林省龙岗火山群地质构造特征研究[J].中国区域地质.(2):157-165.
施行觉,胡亚轩,毛竹,等.2005.以垂直形变资料反演腾冲火山区岩浆活动性的初步研究[J].地震研究,28(3):256-261.
王凯红,纪春华,王秀萍.2004年敦密断裂带的地质特征及演化[J].吉林地质,23(4):23-27.
王勇.1996.粘弹性半空间内膨胀引起的地表垂直位移和重力的变化[J].地壳形变与地震,16(2):8-11.
王振杰.2006.测量中不适定问题的正则化解法[M].北京:科学出版社.
徐德兵,白志达,张秉良,等,2005.吉林龙岗火山碎屑基浪堆积特征与成因机理[J].沉积学报,23(1):60-66.
许才军,李志才.2003.轮回搜索——贝叶斯法及其在大地测量反演中的应用[J].武汉大学学报(信息科学版),28(6):658-662.
张成科,张先康,赵金仁,等.2002.长白山天池火山区及邻近地区壳幔结构探测研究[J].地球物理学报,45(6):812-820.
张先康,张成科,赵金仁,等.2002.长白山天池火山区岩浆系统深部结构的深地震测深研究[J].地震学报,24(2):135-143.
Berrino G,Corrado G,Luogo G,et al.1984.Ground deformation andgravity changes accompanying the1982Pozzuoli uplift[J].BullVolcanol,47(2):187-200.
Decker R W,Koyanagi R Y,Dvorak J J,et al.1983.Seismicity andsurface deformation on Mauna Loa volcano,Hawaii[J].EOS,64(37):545-547.
Hansen P C,O Leary D P.1993.the use of the L-curve in the regulariza-tion of discrete ill-posed Problems[J],SIAM J Sci Comput,14(6):1487-1503.
Hansen P C.1992.Analysis of discrete Ill-posed Problems by means ofthe L-curve[J].SIAMReview,34(4):561-580.
Mogi K.1958.Relation between eruptions of various volcanoes and the de-formations of the ground surfaces around them[J].Bull EarthqRes Inst,36:99-134.
Okada Y.1985.Surface deformation due to shear and tensile faults in ahalf-space[J].BSSA,75(4):1135-1154.
Yang X,Davis P M,Jarnies H D.1988.Deforrtion from inflation of adipping finite prolate spheroid in an elastic half-space as a modelforvolcanic stressing[J].JGR,93(85):4249-4257.
Yang X,Davis P M,Delaney P Tet al.1992.Geodetic analysis of dikeintrusion and motion of the magma reservoir beneath the summit ofKilauea volcano,Hawaii1970-1985[J].Geophys Res.97(B3):3305-3324.
Yokoyama I.1971.A model for the crustal deformations around volcanoes[J].J Phys Earth,19(3):199-207.
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