《CT理论与应用研究》杂志新刊标和地幔速度模型的说明
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摘要
在《ＣＴ理论与应用研究》杂志１９９４~２００１年本杂志“刊标”的基础上,在其上方增加了象征三维体视学成像的三角形四面体的透视图;该刊标的右下侧为医学断面成像扫描仪(包括各种Ｘ－ＣＴ机与核磁共振ＭＲＩ扫描仪等);其左下侧为三维地幔速度模型和地球核的示意图,切出有两个地幔剖面,表示纵波速度二维变化的剖面。该速度剖面系根据赵大鹏教授的理论和计算方法,按照地球上的两个大圆弧做计算和绘制的彩色图,排在本期封４:第一大圆弧,从北极经西巴基斯坦(２８°Ｎ, ６４°Ｅ)到马尔代夫群岛(３°Ｎ,７３°Ｅ);第二大圆弧从马尔代夫群岛点(３°Ｎ,７３°Ｅ)连接巴布新几内亚之南点(１２°Ｓ,１５０°Ｅ),来计算两剖面速度分布并作图的结果,其具体分布参见封４的两条彩色剖面和相应的地理位置图。由于赵教授这篇论文[１]在中国国内只有很少数图书馆收藏,在Ｅｌｓｅｖｉｅｒ Ｓｃｉｅｎｃｅ的ＥＰＳＬ网站上一般人只能查到摘要,本刊对于该地幔速度模型的制作方法和所用数据资料,该模型的优越性和特征进行了叙述,他所用的地震事件数目,多达７１２８个;用于层析反演成像的震相到时数多到近一百万条。该速度如下的特点:在所采用的速度结构中,包含用几个复杂形状的地质速度界面,如莫霍面,以及下沉板块的分界
In this article, we introduce the New Cover Mark of 《CT Theory and Applications》 and a new earth-mantle 3-D velocity model As shown at the lower-left part of the cover of Journal CTTA, our new journal cover-mark, issue No.l, 2002, consists of three parts: the upper part shows a three-dimension triangular four-side view(similar with the stereology imaging mark); The lower-right part denotes a medical imaging scanner(including various X-CT and MRI scanners, etc.); The lower-left part shows the earth-core(red color) and a 3-dimension earth model with two vertical cross-sections of earth-mantle P-wave velocity distribution, which is provided by Prof. Dapeng Zhao, as shown in cover page 4, red and blue colors denote the slow and fast velocities respectively. The velocity perturbation scale is shown below the cross-sections, and its method and data presented in his EPSL paper[1],This paper by Prof. Zhao is very important and has attracted great attention of earth scientists in the world. For details, see the EPSL web site.
In this article, we introduce the New Cover Mark of 《CT Theory and Applications》 and a new earth-mantle 3-D velocity model As shown at the lower-left part of the cover of Journal CTTA, our new journal cover-mark, issue No.l, 2002, consists of three parts: the upper part shows a three-dimension triangular four-side view(similar with the stereology imaging mark); The lower-right part denotes a medical imaging scanner(including various X-CT and MRI scanners, etc.); The lower-left part shows the earth-core(red color) and a 3-dimension earth model with two vertical cross-sections of earth-mantle P-wave velocity distribution, which is provided by Prof. Dapeng Zhao, as shown in cover page 4, red and blue colors denote the slow and fast velocities respectively. The velocity perturbation scale is shown below the cross-sections, and its method and data presented in his EPSL paper[1],This paper by Prof. Zhao is very important and has attracted great attention of earth scientists in the world. For details, see the EPSL web site.
引文
[1]D. Zhao. Seismic structure and origin of hotspots and mantle plumes, Earth Planet. Sci. Lett,192(2001),251-265.
[2]D. Zhao. Seismological structure of subduction zone and its implications for arc magmatism and dynamics, Phys.Earth Planet.Inter.127(2001):197-214
[3]D. Zhao, A. Hasegawa and S. Horiuchi. Tomographic Imaging of P and S wave velocity structure beneath northeaster Japan,J.Geophys.Res.,97(1992),19909-19928
[4]D．Zhao, D., A. Hasegawa, and H. Kanamori. Deep structure of Japan subduction zone as derived from local, regional andteleseismic events, J. Geophys. Res., 99(1994),22313-22329
[5]A. Dziewonski. Mapping the lower mapping the lower mantle: Determination of lateral heterogeneity in P velocity up to degree and order 6, J.Geophys. Res.89(1984):5929-5952.
[6]D．Zhao. New advances of seismic tomography and its applications to subduction zones and earthquake fault zones: A review,Island Arc 10(2001):68:84
[7]E. R. Engdahl, R. van der Hilst, R.P.Buland.Global teleseismic earthquake relocation with improved travel times and proceduresfor depth detemination, Bull. Seism. Soc. Am. 88(1998): 722-743
[8]W. Su, R. Woodward, A. Dziewonski. Degree 12 model of shear velocity heterogeneity in the mantle, J. Geophys. Res. 99(1994):6945-6980
[9]H．Bijwaard, W. Spakman. Tomographic evidence for a narrow whole mantle plume below Iceland. Earth Planet. Sci.Lett. 166(1999):121-126
[10]H. Inoue, Y. Fukao, K. Tanabe,etal. Whole mantle P wave travel time tomography, Phys. Earth Planel.Inter. 59(1990):294-328
[11]W.Mooney,G.Laske,T.Master,CRUST5.1:A global crustal model at 5x5, J.Geophys. Res. 103(1998):727-747
[12]M. Flanagan, P. Shearer. Global mapping of topography on transition zone velocity discontinuities by stacking SS precursors, J.Geophys. Res. 103(1998):2673-2692
[13]B. Kennett, E. Engdahl. Traveltimes for global earthquake location and phase identification, Geophys. J. Int. 105(1991): 429-465.
[14]C. Paige, M. Saunders. LSQR: An algorithm for sparse linear equations and sparse least square, Assoc. Comput. Mach. Trans.Math. Software 8(1982):43-71.
[2]D. Zhao. Seismological structure of subduction zone and its implications for arc magmatism and dynamics, Phys.Earth Planet.Inter.127(2001):197-214
[3]D. Zhao, A. Hasegawa and S. Horiuchi. Tomographic Imaging of P and S wave velocity structure beneath northeaster Japan,J.Geophys.Res.,97(1992),19909-19928
[4]D．Zhao, D., A. Hasegawa, and H. Kanamori. Deep structure of Japan subduction zone as derived from local, regional andteleseismic events, J. Geophys. Res., 99(1994),22313-22329
[5]A. Dziewonski. Mapping the lower mapping the lower mantle: Determination of lateral heterogeneity in P velocity up to degree and order 6, J.Geophys. Res.89(1984):5929-5952.
[6]D．Zhao. New advances of seismic tomography and its applications to subduction zones and earthquake fault zones: A review,Island Arc 10(2001):68:84
[7]E. R. Engdahl, R. van der Hilst, R.P.Buland.Global teleseismic earthquake relocation with improved travel times and proceduresfor depth detemination, Bull. Seism. Soc. Am. 88(1998): 722-743
[8]W. Su, R. Woodward, A. Dziewonski. Degree 12 model of shear velocity heterogeneity in the mantle, J. Geophys. Res. 99(1994):6945-6980
[9]H．Bijwaard, W. Spakman. Tomographic evidence for a narrow whole mantle plume below Iceland. Earth Planet. Sci.Lett. 166(1999):121-126
[10]H. Inoue, Y. Fukao, K. Tanabe,etal. Whole mantle P wave travel time tomography, Phys. Earth Planel.Inter. 59(1990):294-328
[11]W.Mooney,G.Laske,T.Master,CRUST5.1:A global crustal model at 5x5, J.Geophys. Res. 103(1998):727-747
[12]M. Flanagan, P. Shearer. Global mapping of topography on transition zone velocity discontinuities by stacking SS precursors, J.Geophys. Res. 103(1998):2673-2692
[13]B. Kennett, E. Engdahl. Traveltimes for global earthquake location and phase identification, Geophys. J. Int. 105(1991): 429-465.
[14]C. Paige, M. Saunders. LSQR: An algorithm for sparse linear equations and sparse least square, Assoc. Comput. Mach. Trans.Math. Software 8(1982):43-71.
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