苏鲁大别及其周围地区深部P波速度结构特征的初步分析
|
摘要
本文分析了苏鲁大别及其周围地区200km深的地震波速度结构。对上地幔50至200km不同深度的水平切面的速度结构特征进行了详细研究。结果表明,位于大别山地区下的西南侧存在着一个呈西北-东南延展的带状高速区;在苏鲁东海地区的下方,及东北方面也有高速度区域存在。这两个高速度区不相连。在大别山区东北端区与苏鲁超高压变质带的南端地区深部的两个高速区之间,即郯庐断裂的中部存在一个西北-东南延展的低速度区。大别山区下方深部呈现明显的速度梯度变化带。大别山区东端边界也是速度梯度变化带。郯庐断裂的北段,即与苏鲁超高压变质带为邻的部分下方,似乎是一个速度分界带或者速度不连续带。郯庐断裂的北段下方的速度结构与其两侧地区的速度结构明显不同。该段的两侧速度结构常常存在着明显差异。
The velocity structures to 200km deep beneath the Sulu-Dabie and the surrounding were discussed in the present analysis. The characteristics of velocity structure in the horizontal sections for several different layers between the 50 and 200 km were investigated in detail. The results suggest that the high velocity belt extending along the NW-SE direction exists beneath the region southwest of the Dabie mountain region. Another high velocity area exists evidently beneath the Sulu ultrahigh-pressure metamorphosed (UHPM) belt and the region east of the UHPM belt. It looks that the two high velocity areas exist separately in each deep place. The low velocity area extending along NW-SE direction exists beneath the link region between the southern end of Sulu UHPM belt and the northeastern end of the Dabie mountain region, crossing the middle segment of the Tan-Lu fault. The velocity gradient variations along the NE-SW direction reveal beneath the Dabie UHPM belt. The velocity gradient belt strikes along about the NW-SE direction. Such velocity gradient variation belt striking nearly N-S direction also reveals beneath the eastern boundary of the Dabie mountain region. A velocity boundary zone exists beneath the northern segment of the Tanlu fault. The velocity variation is discontinuity as crossing the western boundary of the Sulu UHPM belt. The velocity structures beneath the both sides of the northern segment of the Tanlu fault are usually different from each other. The velocity structure beneath the northern segment of the Tanlu fault is usually different from that beneath each side.
The velocity structures to 200km deep beneath the Sulu-Dabie and the surrounding were discussed in the present analysis. The characteristics of velocity structure in the horizontal sections for several different layers between the 50 and 200 km were investigated in detail. The results suggest that the high velocity belt extending along the NW-SE direction exists beneath the region southwest of the Dabie mountain region. Another high velocity area exists evidently beneath the Sulu ultrahigh-pressure metamorphosed (UHPM) belt and the region east of the UHPM belt. It looks that the two high velocity areas exist separately in each deep place. The low velocity area extending along NW-SE direction exists beneath the link region between the southern end of Sulu UHPM belt and the northeastern end of the Dabie mountain region, crossing the middle segment of the Tan-Lu fault. The velocity gradient variations along the NE-SW direction reveal beneath the Dabie UHPM belt. The velocity gradient belt strikes along about the NW-SE direction. Such velocity gradient variation belt striking nearly N-S direction also reveals beneath the eastern boundary of the Dabie mountain region. A velocity boundary zone exists beneath the northern segment of the Tanlu fault. The velocity variation is discontinuity as crossing the western boundary of the Sulu UHPM belt. The velocity structures beneath the both sides of the northern segment of the Tanlu fault are usually different from each other. The velocity structure beneath the northern segment of the Tanlu fault is usually different from that beneath each side.
引文
Bijwaard H and Spakman W. 2000. Nonlinear global P-wave tomography by iterated linearized inversion. Geophys. J. Int. , 141:71-82
Ernst W G and Peacock S M. 2000. A Thermotectonic model for preservation of ultrahigh-pressure phases in metamorphosed continental crust, Subduction top to bottom, 171-178
Jin ZM, Ou XG, Xu HJ, Kern H, Jin SY, Hou GJ. 2004. Elastic wave velocity of the 2000m depth at Chinese Continental Scientific Drilling: Constraints on deep seismic reflection. Acta Petrologica Sinica, 20(1) :81-96 (in Chinese with English abstract)
Liu JH, Liu FT, Sun RM, Wu H and Wu D. 1995. Seismic tomography velocity structure in the Qinling-Dabie orogenic belt and its north and south edges. Chinese Journal of Geophysics, 38: 46-54 ( in Chinese with English abstract).
Qian Hui. 2002. Tomography Study on the Drilling Area of the Chinese Continental Scientific Drilling Project in the Donghai, Jiangsu Province, Institute of Geology, Chinese Academy Geological Sciences, Post-doctoral thesis
Niu YX, Pan HP, Wang WX, Zhu LF and Xu DH. 2004. Geophysical well logging in main hole ( 0-2000m ) of Chinese Continental Scientific Drilling. Acta Petrologica Sinica, 20(1):166-178 ( in Chinese with English abstract)
Maruyama S, Liou J G and Zhang R. 1994. Tectonic evolution of the ultrahigh-pressure and high pressure metamorphic belts from center China. The Island Arc, 3:112-121
Wang Chunrang, Zhang Xiankang, Chen Buyun, et al. 1997. Study on the crust structures of the Dabie orogen belts. Science in China (Series D), 27(3): 221-226
Xu ZQ. 2004. The scienctific goals and investigation progresses of the Chinese Continental Scientific Drilling project. Acta Petrologica Sinica, 20(1):1-8 ( Chinese with English abstract) .
Xu J R, Zhao Z X and Oike K. 2002. Tectonic characteristics of seismogenic stress field in East Asia, Seismotectonics in Convergent Plate Boundary. Eds. Y. Fujinawa and A. Yoshida, Tokyo: TERRAPUB, pp.481-497
Xu JR, Yang WC, Zhao ZX, Cheng ZY. 2003. Three dimensional velocity structures of the Sulu-Dabie orogen belts. Acta Geologica Sinica, 77: 577-582
Xu P, Liu F, Ye K, Wang Q, Cong B and Chen H. 2002. Flake tectonics in the Sulu orogen in eastern China as revealed by seismic tomography. Geophysical Research Letters, 29(10):23-1
Xu JR, Zhao ZX. 2004. Regional structure characteristics of crustal root of mountain beneath the Sulu orogenic belt. Acta Pelrologica Sinica, 20(1) :149-156 ( in Chinese with English abstract)
Xu J R, Zhao Z X, Ishkawa Y and Oike K. 1988. Properties of the stress field in and around West China, Derived from earthquake mechanism solutions. Bulletin of the Disaster Prevention Research Institute, Kyoto University, 38: 49-78
Xu J R and Yoshiteru K. 2002. Geometry of Slab, Intraslab stress field and its tectonic implication in the Nankai Trough, Japan. Earth Planes and Space, 54: 733-742
Xu JR, Zhao ZX, Kono Y, Kinoshita H. 2003. Regional characteristics of stress field and its dynamics in and around the Nankai Trough, Japan. Chinese J. Geophys. , 46: 488-494 ( in Chinese with English abstract)
Yang Jingsui, Xu Zhiqin, Wu Cailai, et al. 2002. SHRIMP U-Pb on coesite-bearing zircon: evidence for Indosinian ultrahigh-pressure metamorphism in Su-Lu, east China. Acta Geologica Sinica, 76 (3) :355-372 (in Chinese with English abstract)
Zhao Zhixin, Kazuo Oike, Kazuo Matsumura, Yuzo Ishikawa. 1990. Stress field in the continental part of China-Derived from temporal variations of seismic activity. Tectonophysics, 178: 357-372
Zhao Ziixn, Kazuo Matsumura, Kazuo Oike, Yuzo Ishikawa. 1987. Regional characteristics of tempotal variation of seismic activity in east Asia and their mutual relations (2) Regions from Taiwan to south China. Zisin, 40: 593-604 (Japanese with English abstract)
Zhao Z X, Oike K, Matsumura, Kand Ishikawa Y. 1990. Stress field in the continental part of China derived from temporal variations of Seismic activity. Tectonophysics, 178: 357-372
Zhao Zhixin, Ryuji Kubota, Fumio Suzuki and Susumu lizuka. 1997. Crustal structure in the southern Kento-Tokai region derived from the tomographic method for seismic explosion survey. Journal of Physics of the Earth, 45: 433-453
Zhao Z X, Xu J R, Yang W C and Cheng Z Y. 2004. Simulations of reflection seismic profile of borehole area of Chinese Continental Scientific Drilling. Acta Petrologica Sinica, 20(1):139-148 (in Chinese with English abstract)
Zhao ZX, Xu JR and Xu ZQ. 2004. 3-D S wave velocity structure in the upper mantle and the mechanism investigation for the ultrahigh- pressure metamorphosed belt in the Dabie-Sulu region. Acta Petrologica Sinica, 20 (1):157-164 (in Chinese with English abstract)
刘建华,刘福田,孙若昧,吴华,吴丹．1995．秦岭-大别造山带及其 南北缘地震层析成像．地球物理学报,38:46-54
金振民,欧新功,徐海军,H．Kern,金淑燕,侯光久．2004．中国大陆科 学钻探主孔100—2000m岩石弹性波速度:对地震深反射的约 束．岩石学报,20(1):81-96
钱辉,姜枚,宿和平．2002．江苏东海大陆钻址区层析成像．博士后 论文．
牛一雄,潘和平,王文先,朱留方,许东辉．2004．中国大陆科学钻探主 孔(0-2000m)地球物理测井．岩石学报,20(1):165-178
王椿庸,张先康,陈步云．1997．大别造山带的地壳结构研究,中国 科学(D辑),27:221-226
许志琴．2004．中国大陆科学钻探工程的科学目标及初步成果．岩石 学报,20(1):1-8
杨经绥,许志琴,吴才来等．2002．含柯石英锆石的SHLRIMP U-Pb定 年:胶东印支期超高压变质作用的证据．地质学报,76(3):355 —372
徐纪人,赵志新,河野芳辉,木下肇．2003．日本南海海槽区域应力 场及其板块构造动力学特．地球物理学报,46:488-494
徐纪人,赵志新．2004．苏鲁造山带区域地壳山根结构特征．岩石学 报,20(1):149-156
徐纪人,杨文采,赵志新,程振炎．2003．苏鲁大别造山带岩石圈三维 P波速度结构特．地质学报,77:577-582
赵志新,徐纪人,杨文采,程振炎．2004．中国大陆科学钻探孔区反 射地震剖面的数值模拟与分析．岩石学报,20(1):139-148
赵志新 徐纪人 许志琴．2004．上地幔三维S波速度结构与大别苏鲁 超高压变质带俯冲折返机制探讨．岩石学报,20(1):157-164
#12
Ernst W G and Peacock S M. 2000. A Thermotectonic model for preservation of ultrahigh-pressure phases in metamorphosed continental crust, Subduction top to bottom, 171-178
Jin ZM, Ou XG, Xu HJ, Kern H, Jin SY, Hou GJ. 2004. Elastic wave velocity of the 2000m depth at Chinese Continental Scientific Drilling: Constraints on deep seismic reflection. Acta Petrologica Sinica, 20(1) :81-96 (in Chinese with English abstract)
Liu JH, Liu FT, Sun RM, Wu H and Wu D. 1995. Seismic tomography velocity structure in the Qinling-Dabie orogenic belt and its north and south edges. Chinese Journal of Geophysics, 38: 46-54 ( in Chinese with English abstract).
Qian Hui. 2002. Tomography Study on the Drilling Area of the Chinese Continental Scientific Drilling Project in the Donghai, Jiangsu Province, Institute of Geology, Chinese Academy Geological Sciences, Post-doctoral thesis
Niu YX, Pan HP, Wang WX, Zhu LF and Xu DH. 2004. Geophysical well logging in main hole ( 0-2000m ) of Chinese Continental Scientific Drilling. Acta Petrologica Sinica, 20(1):166-178 ( in Chinese with English abstract)
Maruyama S, Liou J G and Zhang R. 1994. Tectonic evolution of the ultrahigh-pressure and high pressure metamorphic belts from center China. The Island Arc, 3:112-121
Wang Chunrang, Zhang Xiankang, Chen Buyun, et al. 1997. Study on the crust structures of the Dabie orogen belts. Science in China (Series D), 27(3): 221-226
Xu ZQ. 2004. The scienctific goals and investigation progresses of the Chinese Continental Scientific Drilling project. Acta Petrologica Sinica, 20(1):1-8 ( Chinese with English abstract) .
Xu J R, Zhao Z X and Oike K. 2002. Tectonic characteristics of seismogenic stress field in East Asia, Seismotectonics in Convergent Plate Boundary. Eds. Y. Fujinawa and A. Yoshida, Tokyo: TERRAPUB, pp.481-497
Xu JR, Yang WC, Zhao ZX, Cheng ZY. 2003. Three dimensional velocity structures of the Sulu-Dabie orogen belts. Acta Geologica Sinica, 77: 577-582
Xu P, Liu F, Ye K, Wang Q, Cong B and Chen H. 2002. Flake tectonics in the Sulu orogen in eastern China as revealed by seismic tomography. Geophysical Research Letters, 29(10):23-1
Xu JR, Zhao ZX. 2004. Regional structure characteristics of crustal root of mountain beneath the Sulu orogenic belt. Acta Pelrologica Sinica, 20(1) :149-156 ( in Chinese with English abstract)
Xu J R, Zhao Z X, Ishkawa Y and Oike K. 1988. Properties of the stress field in and around West China, Derived from earthquake mechanism solutions. Bulletin of the Disaster Prevention Research Institute, Kyoto University, 38: 49-78
Xu J R and Yoshiteru K. 2002. Geometry of Slab, Intraslab stress field and its tectonic implication in the Nankai Trough, Japan. Earth Planes and Space, 54: 733-742
Xu JR, Zhao ZX, Kono Y, Kinoshita H. 2003. Regional characteristics of stress field and its dynamics in and around the Nankai Trough, Japan. Chinese J. Geophys. , 46: 488-494 ( in Chinese with English abstract)
Yang Jingsui, Xu Zhiqin, Wu Cailai, et al. 2002. SHRIMP U-Pb on coesite-bearing zircon: evidence for Indosinian ultrahigh-pressure metamorphism in Su-Lu, east China. Acta Geologica Sinica, 76 (3) :355-372 (in Chinese with English abstract)
Zhao Zhixin, Kazuo Oike, Kazuo Matsumura, Yuzo Ishikawa. 1990. Stress field in the continental part of China-Derived from temporal variations of seismic activity. Tectonophysics, 178: 357-372
Zhao Ziixn, Kazuo Matsumura, Kazuo Oike, Yuzo Ishikawa. 1987. Regional characteristics of tempotal variation of seismic activity in east Asia and their mutual relations (2) Regions from Taiwan to south China. Zisin, 40: 593-604 (Japanese with English abstract)
Zhao Z X, Oike K, Matsumura, Kand Ishikawa Y. 1990. Stress field in the continental part of China derived from temporal variations of Seismic activity. Tectonophysics, 178: 357-372
Zhao Zhixin, Ryuji Kubota, Fumio Suzuki and Susumu lizuka. 1997. Crustal structure in the southern Kento-Tokai region derived from the tomographic method for seismic explosion survey. Journal of Physics of the Earth, 45: 433-453
Zhao Z X, Xu J R, Yang W C and Cheng Z Y. 2004. Simulations of reflection seismic profile of borehole area of Chinese Continental Scientific Drilling. Acta Petrologica Sinica, 20(1):139-148 (in Chinese with English abstract)
Zhao ZX, Xu JR and Xu ZQ. 2004. 3-D S wave velocity structure in the upper mantle and the mechanism investigation for the ultrahigh- pressure metamorphosed belt in the Dabie-Sulu region. Acta Petrologica Sinica, 20 (1):157-164 (in Chinese with English abstract)
刘建华,刘福田,孙若昧,吴华,吴丹．1995．秦岭-大别造山带及其 南北缘地震层析成像．地球物理学报,38:46-54
金振民,欧新功,徐海军,H．Kern,金淑燕,侯光久．2004．中国大陆科 学钻探主孔100—2000m岩石弹性波速度:对地震深反射的约 束．岩石学报,20(1):81-96
钱辉,姜枚,宿和平．2002．江苏东海大陆钻址区层析成像．博士后 论文．
牛一雄,潘和平,王文先,朱留方,许东辉．2004．中国大陆科学钻探主 孔(0-2000m)地球物理测井．岩石学报,20(1):165-178
王椿庸,张先康,陈步云．1997．大别造山带的地壳结构研究,中国 科学(D辑),27:221-226
许志琴．2004．中国大陆科学钻探工程的科学目标及初步成果．岩石 学报,20(1):1-8
杨经绥,许志琴,吴才来等．2002．含柯石英锆石的SHLRIMP U-Pb定 年:胶东印支期超高压变质作用的证据．地质学报,76(3):355 —372
徐纪人,赵志新,河野芳辉,木下肇．2003．日本南海海槽区域应力 场及其板块构造动力学特．地球物理学报,46:488-494
徐纪人,赵志新．2004．苏鲁造山带区域地壳山根结构特征．岩石学 报,20(1):149-156
徐纪人,杨文采,赵志新,程振炎．2003．苏鲁大别造山带岩石圈三维 P波速度结构特．地质学报,77:577-582
赵志新,徐纪人,杨文采,程振炎．2004．中国大陆科学钻探孔区反 射地震剖面的数值模拟与分析．岩石学报,20(1):139-148
赵志新 徐纪人 许志琴．2004．上地幔三维S波速度结构与大别苏鲁 超高压变质带俯冲折返机制探讨．岩石学报,20(1):157-164
#12
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心