云南地区地壳厚度和泊松比研究
摘要
利用中国地震局地壳应力研究所2010～2011年期间在云南腾冲地块、保山地块、思茅地块和扬子块体布设的21个流动地震台站记录到的732个5.0级以上远震事件,得到1939条接收函数.采用H-κ叠加搜索技术,获得了各台站下方的地壳厚度和波速比.结果显示,研究区内地壳厚度和由波速比得到的泊松比变化明显,均显示出块体的深部结构特征.除腾冲地块外,其他三个块体地壳由南向北均呈现出增厚趋势,且由西向东不同块体之间也呈现出明显增厚趋势.扬子块体的泊松比与地壳厚度显示出由南向北明显加大相一致的趋势,这可能暗示该区地壳增厚以下地壳变化为主.与扬子块体不同,保山地块和思茅地块的泊松比变化相对平稳,这种差别证实了金沙江-红河断裂是华南块体的南部边界.腾冲地块的三个流动台站H-κ搜索结果整体上表现为高泊松比特征,但随方位角变化明显,可能暗示出台站下方地壳介质存在着强烈的各向异性.
引文
1)查小惠,孙长青,李聪.倾斜界面和各向异性地层对H-K搜索结果的影响.地球物理学进展,2012,已接收
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2李继亮.滇西三江带的大地构造演化.地质科学,1998,4:337-345
3Wang C Y,Huangfu G.Crustal structure in Tengchong volcano-geothermal area,western Yuannan,China.Tectonophysics,2004,380:69-87
4Li C,van der Hilst R,Meltzer A S,et al.Subduction of the Indian lithosphere beneath the Tibetan Plateau and Burma.Earth Planet Sci Lett,2008,274:157-168
5Lei J S,Zhao D P,Su Y J.Insight into the origin of the Tengchong intraplate volcano and seismotectonic in southwest China from local and teleseismic data.J Geophys Res,2009,113:B05302,doi:10.1029/2008JB005881
6Lei J S,Xie F R,Mishra O P,et al.The2011Yingjiang,China,earthquake:A volcano-related fluid-driven earthquake?Bull Seismol Soc Am,2012,102:417-425
7Royden L H,Clark B C,King R W,et al.Surface deformation and lower crustal flow in eastern Tibet.Science,1997,276:788-790
8Bai D H,Unsworth M J,Meju M A,et al.Crustal deformation of the eastern Tibetan Plateau revealed by magnetotelluric imaging.Nature Geosci,2010,3:358-362,doi:10.1038/NGEO830
9吴建平,明跃红,王椿镛.云南数字地震台站下方的S波速度结构研究.地球物理学报,2001,44:228-237
10Lei J S,Zhang G W,Xie F R,et al.Relocation of the10March2011Yingjiang,China,earthquake sequence and its tectonic implications.Earthq Sci,2012,25:103-110
11钟大赉,丁林.从三江及邻区特提斯演化讨论冈瓦纳大陆离散与亚洲大陆增生.见:IGCP第321项中国工作组,主编.亚洲的增生.北京:地震出版社.1993.5-8
12邓启东,张培震,冉勇康,等.中国活动构造基本特征.中国科学D辑:地球科学,2002,32:1020-1030
13Kan R J,Hu H X,Zeng R S,et al.Crustal structure of Yunnan Province,People’s Republic of China,from seismic refraction profiles.Science,1986,234:433-437
14林中洋,胡鸿祥,张文彬,等.滇西地区地壳上地幔速度结构特征的研究.地震学报,1993,15:427-440
15王椿镛,皇甫岗,万登堡,等.腾冲火山地区地壳结构的人工地震探测.地震地质,2000,23:148-156
16张中杰,白志明,王椿镛,等.三江地区地壳结构及其动力学意义:云南遮放-宾川宽角地震资料的启示.中国科学D辑:地球科学,2005,35:314-319
17张中杰,白志明,王椿镛,等.冈瓦纳型和扬子型地块地壳结构:以滇西孟连-马龙宽角反射剖面为例.中国科学D辑:地球科学,2005,35:387-392
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19孙长青,陈赟,高尔根.青藏高原东缘强烈盆山相互作用区的地壳各向异性特征及其动力学意义探讨.地球物理学报,2011,54:1205-1214
20Yang H Y,Hu J F,Li G Q,et al.Analysis of the crustal thickness and Poisson’s ratio in eastern Tibet from teleseismic receiver functions.Geophys J Int,2011,186:1380-1388,doi:10.1111/j.1365-246X.2011.05118
21胡家富,苏有锦,朱雄关,等.云南的地壳S波速度与泊松比结构及意义.中国科学D辑:地球科学,2003,33:714-722
22徐鸣洁,王良书,刘建华,等.利用接收函数研究哀牢山-红河断裂带地壳上地幔特征.中国科学D辑:地球科学,2005,35:729-737
23李永华,吴庆举,田小波,等.用接收函数方法研究云南及其邻区地壳上地幔结构.地球物理学报,2009,52:67-80
24张洪双,田小波,滕吉文.接收函数方法估计Moho倾斜地区的地壳速度比.地球物理学报,2009,52:1243-1252
25Xu L L,Rondenay S,Hilst R D.Structure of the crust beneath the southeastern Tibetan Plateau from teleseismic receiver functions.Phys Earth Planet Inter,2007,165:176-193
26Wang P,Wang L S,Mi N,et al.Crustal thickness and average Vp/Vs ration variations in southwest Yunnan,China,from teleseismic receiver functions.J Geophys Res,2010,115:B11308,doi:10.1029/2009JB006651
27孔祥儒,刘世杰,窦秦川,等.攀西地区地壳和上地幔中的电性结构.地球物理学报,1987,30:136-143
28Zhu L P,Kanamori H.Moho depth variation in southern California form teleseismic receiver functions.J Geophys Res,2000,105:2969-2980
29Niu F,Bravo T,Pavlis G,et al.Receiver function study of the crustal structure of the southeastern Caribbean plate boundary and Venezuela.J Geophys Res,2007,112:B11308,doi:10.1029/2006JB004802
30Owens T J,Zandt G,Taylor S R.Seismic evidence for an ancient rift beneath the Cumberland Plateau,Tennessee:A detailed analysis of broadband teleseismic P waveforms.J Geophys Res,1984,89:7783-7795
31Chen Y L,Niu F L,Liu R F,et al.Crustal structure beneath China from receiver function analysis.J Geophys Res,2010,115:B03307,doi:10.1029/2009JB006386
32Ligorria J P,Ammon C J.Iterative deconvolution and receiver-function estimation.Bull Seismol Soc Amer,1995,89:1395-1400
33Efron B,Tibshirani R.Statistical data analysis in the computer age.Science,1991,253:390-395
34Chevrot S,Robert D,van der Hilst R.The Poisson ratio of the Australian crust:Geological and geophysical implications with receiver functions.Earth Planet Sci Lett,2000,183:121-132
35Kennett B L N,Engdahl R.Travel times for global earthquake location and phase identification.Geophys J Int,1991,105:429-465
36Lombardi D,Braunmiller J,Kissling E,et al.Moho depth and Poisson’s ratio in the Western-Central Alps from receiver functions.Geophys J Int,2008,173:249-264
37Kennett B L N,Engdahl R,Buland R.Constraints on seismic velocities in the Earth from traveltimes.Geophys J Int,1995,122:108-124
38刘琼林,王椿镛,姚志祥,等.华北克拉通中西部地区地壳厚度与波速比研究.地球物理学报,2011,54:2213-2224
39孙丽,刘瑞丰,黄志斌,等.用接收函数研究川滇地区国家地震台下地壳厚度及波速比.中国地震,2008,24:362-369
40毛慧玲,秦嘉政.腾冲地震台数字地震记录S波分裂研究.地震研究,2011,34:494-497
41赵慈平,冉华,陈坤华.由相对地热梯度推断的腾冲火山区现存岩浆囊.岩石学报,2006,22:1517-1528
1钟大赉.滇川西部古特提斯造山带.北京:科学出版社,1998
2李继亮.滇西三江带的大地构造演化.地质科学,1998,4:337-345
3Wang C Y,Huangfu G.Crustal structure in Tengchong volcano-geothermal area,western Yuannan,China.Tectonophysics,2004,380:69-87
4Li C,van der Hilst R,Meltzer A S,et al.Subduction of the Indian lithosphere beneath the Tibetan Plateau and Burma.Earth Planet Sci Lett,2008,274:157-168
5Lei J S,Zhao D P,Su Y J.Insight into the origin of the Tengchong intraplate volcano and seismotectonic in southwest China from local and teleseismic data.J Geophys Res,2009,113:B05302,doi:10.1029/2008JB005881
6Lei J S,Xie F R,Mishra O P,et al.The2011Yingjiang,China,earthquake:A volcano-related fluid-driven earthquake?Bull Seismol Soc Am,2012,102:417-425
7Royden L H,Clark B C,King R W,et al.Surface deformation and lower crustal flow in eastern Tibet.Science,1997,276:788-790
8Bai D H,Unsworth M J,Meju M A,et al.Crustal deformation of the eastern Tibetan Plateau revealed by magnetotelluric imaging.Nature Geosci,2010,3:358-362,doi:10.1038/NGEO830
9吴建平,明跃红,王椿镛.云南数字地震台站下方的S波速度结构研究.地球物理学报,2001,44:228-237
10Lei J S,Zhang G W,Xie F R,et al.Relocation of the10March2011Yingjiang,China,earthquake sequence and its tectonic implications.Earthq Sci,2012,25:103-110
11钟大赉,丁林.从三江及邻区特提斯演化讨论冈瓦纳大陆离散与亚洲大陆增生.见:IGCP第321项中国工作组,主编.亚洲的增生.北京:地震出版社.1993.5-8
12邓启东,张培震,冉勇康,等.中国活动构造基本特征.中国科学D辑:地球科学,2002,32:1020-1030
13Kan R J,Hu H X,Zeng R S,et al.Crustal structure of Yunnan Province,People’s Republic of China,from seismic refraction profiles.Science,1986,234:433-437
14林中洋,胡鸿祥,张文彬,等.滇西地区地壳上地幔速度结构特征的研究.地震学报,1993,15:427-440
15王椿镛,皇甫岗,万登堡,等.腾冲火山地区地壳结构的人工地震探测.地震地质,2000,23:148-156
16张中杰,白志明,王椿镛,等.三江地区地壳结构及其动力学意义:云南遮放-宾川宽角地震资料的启示.中国科学D辑:地球科学,2005,35:314-319
17张中杰,白志明,王椿镛,等.冈瓦纳型和扬子型地块地壳结构:以滇西孟连-马龙宽角反射剖面为例.中国科学D辑:地球科学,2005,35:387-392
18Chen Y,Zhang Z J,Sun C Q,et al.Crustal anisotropy from Moho converted Ps wave splitting analysis and geodynamic implications beneath the eastern margin of Tibet and surrounding regions.Gondwana Res,2012,doi:10.1016/j.gr.2012.04.003
19孙长青,陈赟,高尔根.青藏高原东缘强烈盆山相互作用区的地壳各向异性特征及其动力学意义探讨.地球物理学报,2011,54:1205-1214
20Yang H Y,Hu J F,Li G Q,et al.Analysis of the crustal thickness and Poisson’s ratio in eastern Tibet from teleseismic receiver functions.Geophys J Int,2011,186:1380-1388,doi:10.1111/j.1365-246X.2011.05118
21胡家富,苏有锦,朱雄关,等.云南的地壳S波速度与泊松比结构及意义.中国科学D辑:地球科学,2003,33:714-722
22徐鸣洁,王良书,刘建华,等.利用接收函数研究哀牢山-红河断裂带地壳上地幔特征.中国科学D辑:地球科学,2005,35:729-737
23李永华,吴庆举,田小波,等.用接收函数方法研究云南及其邻区地壳上地幔结构.地球物理学报,2009,52:67-80
24张洪双,田小波,滕吉文.接收函数方法估计Moho倾斜地区的地壳速度比.地球物理学报,2009,52:1243-1252
25Xu L L,Rondenay S,Hilst R D.Structure of the crust beneath the southeastern Tibetan Plateau from teleseismic receiver functions.Phys Earth Planet Inter,2007,165:176-193
26Wang P,Wang L S,Mi N,et al.Crustal thickness and average Vp/Vs ration variations in southwest Yunnan,China,from teleseismic receiver functions.J Geophys Res,2010,115:B11308,doi:10.1029/2009JB006651
27孔祥儒,刘世杰,窦秦川,等.攀西地区地壳和上地幔中的电性结构.地球物理学报,1987,30:136-143
28Zhu L P,Kanamori H.Moho depth variation in southern California form teleseismic receiver functions.J Geophys Res,2000,105:2969-2980
29Niu F,Bravo T,Pavlis G,et al.Receiver function study of the crustal structure of the southeastern Caribbean plate boundary and Venezuela.J Geophys Res,2007,112:B11308,doi:10.1029/2006JB004802
30Owens T J,Zandt G,Taylor S R.Seismic evidence for an ancient rift beneath the Cumberland Plateau,Tennessee:A detailed analysis of broadband teleseismic P waveforms.J Geophys Res,1984,89:7783-7795
31Chen Y L,Niu F L,Liu R F,et al.Crustal structure beneath China from receiver function analysis.J Geophys Res,2010,115:B03307,doi:10.1029/2009JB006386
32Ligorria J P,Ammon C J.Iterative deconvolution and receiver-function estimation.Bull Seismol Soc Amer,1995,89:1395-1400
33Efron B,Tibshirani R.Statistical data analysis in the computer age.Science,1991,253:390-395
34Chevrot S,Robert D,van der Hilst R.The Poisson ratio of the Australian crust:Geological and geophysical implications with receiver functions.Earth Planet Sci Lett,2000,183:121-132
35Kennett B L N,Engdahl R.Travel times for global earthquake location and phase identification.Geophys J Int,1991,105:429-465
36Lombardi D,Braunmiller J,Kissling E,et al.Moho depth and Poisson’s ratio in the Western-Central Alps from receiver functions.Geophys J Int,2008,173:249-264
37Kennett B L N,Engdahl R,Buland R.Constraints on seismic velocities in the Earth from traveltimes.Geophys J Int,1995,122:108-124
38刘琼林,王椿镛,姚志祥,等.华北克拉通中西部地区地壳厚度与波速比研究.地球物理学报,2011,54:2213-2224
39孙丽,刘瑞丰,黄志斌,等.用接收函数研究川滇地区国家地震台下地壳厚度及波速比.中国地震,2008,24:362-369
40毛慧玲,秦嘉政.腾冲地震台数字地震记录S波分裂研究.地震研究,2011,34:494-497
41赵慈平,冉华,陈坤华.由相对地热梯度推断的腾冲火山区现存岩浆囊.岩石学报,2006,22:1517-1528
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