应用远震有限频率层析成像反演中国东北地区上地幔P波三维速度结构

doi:10.12196/j.issn.1000-3274.2020.04.003

摘要/Abstract

摘要： 选取黑龙江、吉林、辽宁、内蒙古区域地震台网, 以及NECESSArray流动台阵记录的223个远震事件的波形资料, 采用多道互相关方法得到了22569个P波相对走时数据, 并计算了相应的走时灵敏度核, 应用有限频率层析成像反演得到中国东北地区上地幔600 km以上的P波三维速度结构模型, 利用检测板评估了反演结果的分辨率。结果表明, 松辽盆地下方80~200 km的深度上呈主体的低速异常, 与这一地区上地幔浅部的高地温值和低密度的特征相互对应, 可能暗示了部分熔融的地幔。南北重力梯度带两侧的速度结构明显不同, 这一差异可以延伸到200 km以下, 表明在中国东北地区南北重力梯度带有可能是一条上地幔内部结构的变化带, 或是深部结构的分界线。长白山火山区下呈大范围的低速异常, 并可从上地幔浅部延伸到地幔转换带中, 推测此低速异常可能反映了地幔转换带内上涌的热物质, 上涌的原因则主要是受到太平洋板块俯冲运动的作用。

关键词: 有限频率层析成像, 上地幔速度结构, 松辽盆地, 南北重力梯度带, 长白山火山

Abstract: We selected waveform data from 223 teleseismic events recorded by Heilongjiang, Jilin, Liaoning, Inner Mongolia regional permanent networks and NECESSArray temporary network, obtained 22569 P-wave relative travel-times by multi-channel cross correlation measurement, calculated travel-time sensitivity kernels, and applied the finite-frequency tomography to determine three-dimensional P-wave velocity structure model of the mantle down to the depth of 600 km beneath Northeast China. We evaluated the resolution of inversion results by using checkerboard test. Our results reveal a low-velocity anomaly extending from 80 to at least 200 km depth beneath the Songliao basin, which corresponds to the characteristics of high temperature and low density in this depth range, so this low-velocity anomaly may imply partial melting of the upper mantle. The velocity structures on the both sides of the North-South Gravity Lineament (NSGL) are obviously different, and this difference can extend below 200km depth, which is suggest that NSGL may be a variation belt or a boundary of internal structures in the upper mantle beneath Northeast China. There is a wide range of low-velocity anomalies beneath the Changbaishan volcanic region, which can extend from the shallow part of the upper mantle to the mantle transition zone. We speculate that these low-velocity anomalies may reflect the upwelling of hot materials in the mantle transition zone, and the upwelling is mainly caused by the subduction of the Pacific plate.

Key words: Finite-frequency tomography, Velocity structure of the upper mantle, Songliao basin, North-South Gravity Lineament, Changbaishan volcano

中图分类号:

P315.7

杨峰. 应用远震有限频率层析成像反演中国东北地区上地幔P波三维速度结构[J]. 地震, 2020, 40(4): 33-48.

YANG Feng. 3D P-wave Velocity Structure of the Upper Mantle beneath Northeast China from Teleseismic Finite-frequency Tomography[J]. EARTHQUAKE, 2020, 40(4): 33-48.

参考文献

[1] Li S T, Mo X X, Yang S G. Evolution of circum-pacific basins and volcanic belts in east China and their geodynamic background[J]. Journal China University of Geosciences, 1995, 6(1): 48-58.
[2] 潘桂棠, 肖庆辉, 陆松年, 等. 中国大地构造单元划分[J]. 中国地质, 2009, 36(1): 1-28.
PAN Gui-tang, XIAO Qing-hui, LU Song-nian, et al. Subdivision of tectonic units in China[J]. Geology in China, 2009, 36(1): 1-28 (in Chinese).
[3] 张立敏, 唐晓明. 西太平洋板块俯冲运动与中国东北深震带[J]. 地球物理学报, 1983, 26(4): 331-340.
ZHANG Li-min, TANG Xiao-ming. The underthrusting movement of the western Pacific plate and the deep focus earthquake zone of northeast China[J]. Chinese Journal of Geophysics, 1983, 26(4): 331-340 (in Chinese).
[4] 赵大鹏, 雷建设, 唐荣余. 中国东北长白山火山的起源: 地震层析成像证据[J]. 科学通报, 2004, 49(14): 1439-1446.
ZHAO Da-peng, LEI Jian-she, TANG Rong-yu. Origin of the Changbai intraplate volcanism in Northeast China: Evidence from seismic tomography[J]. Chinese Science Bulletin, 2004, 49(13): 1401-1408 (in Chinese).
[5] Huang J L, Zhao D P. High-resolution mantle tomography of China and surrounding regions[J]. Journal of Geophysical Research: Solid Earth, 2006, 111(B9): B09305.
[6] Chen C X, Zhao D P, Tian Y, et al. Mantle transition zone, stagnant slab and intraplate volcanism in Northeast Asia[J]. Geophysical Journal International, 2017, 209(1): 68-85.
[7] Li Y H, Wu Q J, Pan J T, et al. S-wave velocity structure of northeastern China from joint inversion of Rayleigh wave phase and group velocities[J]. Geophysical Journal International, 2012, 190(1): 105-115.
[8] Li G L, Chen H C, Niu F L, et al. Measurement of Rayleigh wave ellipticity and its application to the joint inversion of high-resolution S wave velocity structure beneath northeast China[J]. Journal of Geophysical Research: Solid Earth, 2016, 121(2): 864-880.
[9] Liu Z K, Huang J L, Yao H J. Anisotropic Rayleigh wave tomography of Northeast China using ambient seismic noise[J]. Physics of the Earth and Planetary Interiors, 2016, 256: 37-48.
[10] Ai Y S, Zheng T Y, Xu W W, et al. A complex 660 km discontinuity beneath northeast China[J]. Earth and Planetary Science Letters, 2003, 212(1-2): 63-71.
[11] Li S, Huang J, Liu Z, et al. Study on the mantle discontinuity structures beneath Northeast China with time-frequency phase-weighted stacks of ambient noise correlations[J]. Geophysical Journal International, 2019, 218: 1490-1501.
[12] Tian Y, Zhu H X, Zhao D P, et al. Mantle transition zone structure beneath the Changbai volcano: Insight into deep slab dehydration and hot upwelling near the 410 km discontinuity[J]. Journal of Geophysical Research: Solid Earth, 2016, 121(8): 5794-5808.
[13] Zhang R Q, Gao Z Y, Wu Q J, et al. Seismic images of the mantle transition zone beneath Northeast China and the Sino-Korean craton from P-wave receiver functions[J]. Tectonophysics, 2016, 675: 159-167.
[14] Lei J S, Zhao D P. P-wave tomography and origin of the Changbai intraplate volcano in Northeast Asia[J]. Tectonophysics, 2005, 397(3-4): 281-295.
[15] Tang Y C, Obayashi M, Niu F L, et al. Changbaishan volcanism in northeast China linked to subduction-induced mantle upwelling[J]. Nature Geoscience, 2014, 7(6): 470-475.
[16] Zhao D P, Tian Y, Lei J S, et al. Seismic image and origin of the Changbai intraplate volcano in East Asia: Role of big mantle wedge above the stagnant Pacific slab[J]. Physics of the Earth and Planetary Interiors, 2009, 173(3-4): 197-206.
[17] Zhao D P, Yu S, Ohtani E. East Asia: Seismotectonics, magmatism and mantle dynamics[J]. Journal of Asian Earth Sciences, 2011, 40(3): 689-709.
[18] Zhao D P, Tian Y. Changbai intraplate volcanism and deep earthquakes in East Asia: A possible link?[J]. Geophysical Journal International, 2013, 195(2): 706-724.
[19] Gan W, Frohlich C, Jin Z M. Origin and significance of deep earthquake clusters surrounding a pronounced seismic gap in northeast China[J]. Journal of Asian Earth Sciences, 2015, 100: 91-97.
[20] Jiang G M, Zhao D P. Metastable olivine wedge in the subducting Pacific slab and its relation to deep earthquakes[J]. Journal of Asian Earth Sciences, 2011, 42(6): 1411-1423.
[21] Hung S -H, Shen Y, Chiao L -Y. Imaging seismic velocity structure beneath the Iceland hot spot: A finite frequency approach[J]. Journal of Geophysical Research: Solid Earth, 2004, 109(B8): B08305.
[22] Yang T, Grand S P, Wilson D, et al. Seismic structure beneath the Rivera subduction zone from finite-frequency seismic tomography[J]. Journal of Geophysical Research: Solid Earth, 2009, 114(B1): B01302.
[23] 杨峰, 黄金莉, 杨挺. 应用远震有限频率层析成像反演首都圈上地幔速度结构[J]. 地球物理学报, 2010, 53(8): 1806-1816.
YANG Feng, HUANG Jin-li, YANG Ting. Upper mantle structure beneath the Chinese capital region from teleseismic finite-frequency tomography[J]. Chinese Journal of Geophysics, 2010, 53(8): 1806-1816 (in Chinese).
[24] VanDecar J C, Crosson R S. Determination of teleseismic relative phase arrival times using multi-channel cross-correlation and least squares[J]. Bulletin of the Seismological Society of America, 1990, 80: 150-169.
[25] Dahlen F A, Hung S -H, Nolet G. Fréchet kernels for finite-frequency traveltimes—Ⅰ. Theory[J]. Geophysical Journal International, 2000, 141(1): 157-174.
[26] Hung S -H, Dahlen F A, Nolet G. Fréchet kernels for finite-frequency traveltimes—Ⅱ. Examples[J]. Geophysical Journal International, 2000, 141(1): 175-203.
[27] Menke W. Geophysical Data Analysis: Discrete Inverse Theory[M]. New York: Academic Press, 1989.
[28] Paige C C, Saunders M A. LSQR: An algorithm for sparse linear equations and sparse least squares[J]. ACM Transactions on Mathematical Software, 1982, 8(1): 43-71.
[29] Kennett B L N, Engdahl E R. Traveltimes for global earthquake location and phase identification[J]. Geophysical Journal International, 1991, 105(2): 429-465.
[30] 张风雪, 吴庆举, 李永华. 中国东北地区远震P波走时层析成像研究[J]. 地球物理学报, 2013, 56(8): 2690-2700.
ZHANG Feng-xue, WU Qing-ju, LI Yong-hua. The traveltime tomography study by teleseismic P wave data in the Northeast China area[J]. Chinese Journal of Geophysics, 2013, 56(8): 2690-2700 (in Chinese).
[31] Ma J C, Tian Y, Zhao D P. P-wave tomography of Northeast Asia: Constraints on the Western Pacific plate subduction and mantle dynamics[J]. Physics of the Earth and Planetary Interiors, 2018, 274: 105-126.
[32] Kang D, Shen W, Ning J, et al. Seismic evidence for lithospheric modification associated with intracontinental volcanism in Northeastern China[J]. Geophysical Journal International, 2016, 204(1): 215-235.
[33] Wei W, Hammond J O S, Zhao D P, et al. Seismic evidence for a mantle transition zone origin of the Wudalianchi and Halaha volcanoes in northeast China[J]. Geochemistry, Geophysics, Geosystems, 2019, 20(1): 398-416.
[34] 安美建, 石耀霖. 中国大陆地壳和上地幔三维温度场[J]. 中国科学(D辑: 地球科学), 2007, 37(6): 736-745.
AN Mei-jian, SHI Yao-lin. 3D temperature of crust and lithosphere mantle in Chinese continent[J]. Science China (Series D), 2007, 37(6): 736-745 (in Chinese).
[35] Sun Y J, Dong S W, Zhang H, et al. 3D thermal structure of the continental lithosphere beneath China and adjacent regions[J]. Journal of Asian Earth Sciences, 2013, 62: 697-704.
[36] 索奎, 张贵宾, 江国明, 等. 重震反演中国东北地壳上地幔三维密度结构[J]. 地球物理学报, 2015, 58(7): 2436-2444.
SUO Kui, ZHANG Gui-bin, JIANG Guo-ming, et al. 3-D density distribution of the crust and upper mantle beneath Northeast China by joint inversion of gravity and seismic data[J]. Chinese Journal of Geophysics, 2015, 58(7): 2436-2444 (in Chinese).
[37] 杨宝俊, 穆石敏, 金旭, 等. 中国满洲里—绥芬河地学断面地球物理综合研究[J]. 地球物理学报, 1996, 39(6): 772-782.
YANG Bao-jun, MU Shi-min, JIN Xu, et al. Synthesized study on the geophysics of Manzhouli—Suifenhe geoseience transect, China[J]. Chinese Journal of Geophysics, 1996, 39(6): 772-782 (in Chinese).
[38] 任纪舜, 陈廷愚, 牛宝贵, 等. 中国东部及邻区大陆岩石圈的构造演化与成矿[M]. 北京: 科学出版社, 1990.
REN Ji-shun, CHEN Ting-yu, NIU Bao-gui, et al. Tectonic Evolution and Metallogenesis of the Continental Lithosphere in Eastern China and Its Adjacent Ares[M]. Beijing: Science Press, 1990 (in Chinese).
[39] 张广成, 吴庆举, 潘佳铁, 等. 利用H-K叠加方法和CCP叠加方法研究中国东北地区地壳结构与泊松比[J]. 地球物理学报, 2013, 56(12): 4084-4094.
ZHANG Guang-cheng, WU Qin-ju, PAN Jia-tie, et al. Study of crustal structure and Poisson ratio of NE China by H-K stack and CCP stack methods[J]. Chinese Journal of Geophysics, 2013, 56(12): 4084-4094 (in Chinese).
[40] Tao K, Niu F L, Ning J Y, et al. Crustal structure beneath NE China imaged by NECESSArray receiver function data[J]. Earth and Planetary Science Letters, 2014, 398: 48-57.
[41] Zhang R Q, Wu Q J, Sun L, et al. Crustal and lithospheric structure of Northeast China from S-wave receiver functions[J]. Earth and Planetary Science Letters, 2014, 401: 196-205.
[42] Li J, Niu F L. Seismic anisotropy and mantle flow beneath northeast China inferred from regional seismic networks[J]. Journal of Geophysical Research: Solid Earth, 2010, 115(B12): B12327.
[43] Li S L, Guo Z, Chen Y J. Complicated 3D mantle flow beneath Northeast China from shear wave splitting and its implication for the Cenozoic intraplate volcanism[J]. Tectonophysics, 2017, 709: 1-8.
[44] Wei W, Zhao D P, Xu J D, et al. P and S wave tomography and anisotropy in Northwest Pacific and East Asia: Constraints on stagnant slab and intraplate volcanism[J]. Journal of Geophysical Research: Solid Earth, 2015, 120(3): 1642-1666.
[45] Inoue T, Tanimoto Y, Irifune T, et al. Thermal expansion of wadsleyite, ringwoodite, hydrous wadsleyite and hydrous ringwoodite[J]. Physics of the Earth and Planetary Interiors, 2004, 143: 279-290.
[46] Komabayashi T, Omori S, Maruyama S. Petrogenetic grid in the system MgO-SiO₂-H₂O up to 30 GPa, 1600℃: Applications to hydrous peridotite subducting into the Earth’s deep interior[J]. Journal of Geophysical Research: Solid Earth, 2004, 109(B3): B03206.
[47] Ohtani E, Litasov K, Hosoya T, et al. Water transport into the deep mantle and formation of a hydrous transition zone[J]. Physics of the Earth and Planetary Interiors, 2004, 143-144: 255-269.
[48] Dokht R M H, Gu Y J, Sacchi M D. Waveform inversion of SS precursors: An investigation of the northwestern Pacific subduction zones and intraplate volcanoes in China[J]. Gondwana Research, 2016, 40: 77-90.
[49] 郑秀芬, 欧阳飚, 张东宁, 等. “国家数字测震台网数据备份中心”技术系统建设及其对汶川大地震研究的数据支撑[J]. 地球物理学报, 2009, 52(5): 1412-1417.
ZHENG Xiu-fen, OUYANG Biao, ZHANG Dong-ning, et al. Technical system construction of Data Backup Centre for China Seismograph Network and the data support to researches on the Wenchuan earthquake[J]. Chinese Journal of Geophysics, 2009, 52(5): 1412-1417 (in Chinese).
[50] Wessel P, Smith W H F. New, improved version of Generic Mapping Tools released[J]. Eos, Transactions American Geophysical Union, 1995, 79(47): 579.