中国东部地区的壳-幔过渡带结构

doi:10.6038/cjg2018L0551

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (3037 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要莫霍面是地壳和上地幔的边界，但莫霍面并不是一个简单的"面"，而是一个反映地壳和地幔物质交换、相互作用等动力学意义的"过渡带".本文综合深地震反射、宽角地震折射和高温高压岩石物理实验结果，确定壳-幔过渡带的地震P波速度变化范围为6.8~7.5 km·s^-1.在克拉通等构造活动稳定地区壳-幔过渡带内的速度梯度强且壳-幔过渡带厚度薄，而在造山带等构造活动区域壳-幔过渡带内的速度梯度弱且壳-幔过渡带厚.中国东部地区的壳-幔过渡带的平均厚度约为5~10 km，在四川盆地下方最薄（<5 km），而在华北克拉通中部造山带下方的壳-幔过渡带最厚（~30 km）.综合地球化学结果，华北中部巨厚壳-幔过渡带主要是幔源岩浆的底侵作用和堆晶作用而形成.

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	孙伟家
	符力耘
	魏伟
	林羿
	唐清雅

关键词 ：壳-幔过渡带, 地震波传播, 层析反演, 地震光照成像, 底侵作用

Abstract：The Moho is a discontinuity separating the crust from the mantle. However, the Moho cannot be simply represented by a sharp discontinuity but a transition with thickness ranging from several kilometers to tens of kilometers. The transition could reveal the interactions between the crust and the mantle. Combining the results of deep seismic sounding, wide-angle seismic refractions and high-temperature high-pressure experiments, the paper determines the range of P wave speed of the crust-mantle transition to be 6.8~7.5 km·s^-1. The mean thickness of the crust-mantle transition is 5~10 km beneath eastern China. The thinnest crust-mantle transition occurs beneath Sichuan Basin, the core of Yangtze Craton. The crust-mantle transition beneath Trans-North China Orogen (TNCO) is as thick as~30 km. With geochemical evidences, the thick crust-mantle transition might be attributed to underplating and accumulation of mantle magma.

Key words： Crust-mantle transition Seismic wave propagation Tomographic inversion Seismic daylight imaging Underplating

收稿日期: 2017-09-02

PACS:

P315

基金资助:国家自然科学基金项目（41720104006，41630210）和中国科学院青年创新促进会（2017094）联合资助.

作者简介: 孙伟家,男,1984年生,主要从事地球内部结构与演化的研究.E-mail:swj@mail.iggcas.ac.cn

链接本文:

http://manu39.magtech.com.cn/Geophy/CN/10.6038/cjg2018L0551 或 http://manu39.magtech.com.cn/Geophy/CN/Y2018/V61/I3/845

Braile L W, Smith R B. 1975. Guide to the interpretation of crustal refraction profiles. Geophysical Journal International, 40(2):145-176.
Claerbout J F. 1968. Synthesis of a layered medium from its acoustic transmission response. Geophysics, 33(2):264-269.
Coleman R G. 1971. Petrologic and geophysical nature of serpentinites. Geological Society of America Bulletin, 82(4):897-918.
Collins C. 1991. The nature of the crust-mantle boundary under Australia from seismic evidence. The Australian Lithosphere, 17:67-80.
Data Management Centre of China National Seismic Network. 2007. Waveform data of China National Seismic Network (in Chinese). Institute of Geophysics, China Earthquake Administration, doi:10. 11998/SeisDmc/SN, http://www.seisdmc.ac.cn.
Deng W M, Zhong D L. 1997. Crust-mantle transition and its geological meanings in lithospheric evolution. Chinese Science Bulletin (in Chinese), 42(23):2474-2482.
Deng Y F, Li S L, Fan W M, et al. 2011. Crustal structure beneath South China revealed by deep seismic soundings and its dynamics implications. Chinese Journal of Geophysics (in Chinese), 54(10):2560-2574, doi:10.3969/j.issn.0001-5733.2011.10.013.
Fan Q C, Zhang H F, Sui J L, et al. 2005. Magmatic underplating and crust-mantle boundary in Hannuoba-evidence from xenolith petrology and geochemistry. Science in China:Earth Science (in Chinese), 35(1):1-14.
Gorbatov A, Saygin E, Kennett B L N. 2013. Crustal properties from seismic station autocorrelograms. Geophysical Journal International, 192(2):861-870.
Griffin W L, O'Reilly S Y. 1987. Is the continental Moho the crust-mantle boundary?. Geology, 15(3):241-244.
He Y F, Zhao K C, Zhang X B, et al. 2006. Pn geometric spreading in the upper mantle with linear velocity gradient. Progress in Geophysics (in Chinese), 21(4):1093-1098.
Holbrook W S, Mooney W D, Christensen N I. 1992. The seismic velocity structure of the deep continental crust. Developments in Geotectonics, 23:1-43.
Hu H X, Lin Z Y, Bian Y J, et al. 1996. Characteristics of crust-mantle transition in western Yunnan region. Acta Seismologica Sinica (in Chinese), 18(4):444-450.
Kennett B L N. 2002. The Seismic Wavefield Ⅱ:Interpretation of Seismograms on Regional and Global Scales. Cambridge:Cambridge University Press.
Kennett B L N. 2015. Lithosphere-asthenosphere P-wave reflectivity across Australia. Earth and Planetary Science Letters, 431:225-235.
Kennett B L N, Furumura T. 2008. Stochastic waveguide in the lithosphere:Indonesian subduction zone to Australian craton. Geophysical Journal International, 172(1):363-382.
Kennett B L N, Furumura T. 2016. Multiscale seismic heterogeneity in the continental lithosphere. Geochemistry, Geophysics, Geosystems, 17(3):791-809.
Lai X L, Zhang X K, Fang S M. 2004. Study of crust-mantle transitional zone along the northeast margin of Qinghai-Xizang Plateau. Acta Seismologica Sinica (in Chinese), 26(2):132-139.
Li T D, Pan G T, Xiao X C, et al. 2013. Geological Records and Mechanism of the Uplift of the Qinghai-Tibet Plateau (in Chinese). Guangdong:Guangdong Science and Technology Press.
Li Y H, Gao M T, Wu Q J. 2014. Crustal thickness map of the Chinese mainland from teleseismic receiver functions. Tectonophysics, 611:51-60.
Pham T S, Tkalčić H. 2017. On the feasibility and use of teleseismic P wave coda autocorrelation for mapping shallow seismic discontinuities. Journal of Geophysical Research:Solid Earth, 122(5):3776-3791.
Prodehl C, Kennett B L N, Artemieva I M, et al. 2013. 100 years of seismic research on the Moho. Tectonophysics, 609:9-44.
Rickett J, Claerbout J. 1999. Acoustic daylight imaging via spectral factorization:Helioseismology and reservoir monitoring. The Leading Edge, 18(8):957-960.
Sambridge M S, Kennett B L N. 2001. Seismic event location:nonlinear inversion using a neighbourhood algorithm. Pure and Applied Geophysics, 158(1-2):241-257.
Saygin E, Cummins P R, Lumley D. 2017. Retrieval of the P wave reflectivity response from autocorrelation of seismic noise:Jakarta Basin, Indonesia. Geophysical Research Letters, 44(2):792-799.
Selway K, Ford H, Kelemen P. 2015. The seismic mid-lithosphere discontinuity. Earth and Planetary Science Letters, 414:45-57.
Schuster G, Yu J, Sheng J, et al. 2004. Interferometric/daylight seismic imaging. Geophysical Journal International, 157(2):838-852.
Shao J A, Han Q J. 2000. Crust-mantle transition in early Mesozoic beneath eastern Inner Mongolia:elastic velocity measurement of xenolith under high-temperature high-press experiment. Science in China:Earth Science (in Chinese), 30(B12):154-160.
Simmons N A, Myers S C, Johannesson G, et al. 2012. LLNL-G3Dv3:Global P wave tomography model for improved regional and teleseismic travel time prediction. Journal of Geophysical Research:Solid Earth, 117(B10):B10302, doi:10.1029/2012JB009525.
Sun W J, Zhou B Z, Fu L Y. 2015. A staggered-grid convolutional differentiator for elastic wave modelling. Journal of Computational Physics, 301:59-76.
Sun W J, Kennett B L N. 2016a. Uppermost mantle P wavespeed structure beneath eastern China and its surroundings. Tectonophysics, 683:12-26.
Sun W J, Kennett B L N. 2016b. Uppermost mantle structure of the Australian continent from Pn traveltime tomography. Journal of Geophysical Research:Solid Earth, 121(3):2004-2019.
Sun W J, Kennett B L N. 2016c. Receiver structure from teleseisms:Autocorrelation and cross correlation. Geophysical Research Letters, 43(12):6234-6242.
Sun W J, Kennett B L N. 2016d. Uppermost mantle structure beneath eastern China and its surroundings from Pn and Sn tomography. Geophysical Research Letters, 43(7):3143-3149.
Sun W J, Kennett B L N. 2017. Mid-lithosphere discontinuities beneath the western and central North China Craton. Geophysical Research Letters, 44(3):1302-1310.
Teng J W. 2006. Research on layer-bundle fine structures and physical attributes of crust-mantle boundary in deep earth. Journal of Jilin University (Earth Science Edition) (in Chinese), 36(1):1-23.
Teng J W, Zhang Z J, Zhang X K, et al. 2013. Investigation of the Moho discontinuity beneath the Chinese mainland using deep seismic sounding profiles. Tectonophysics, 609:202-216.
Thybo H, Artemieva I M. 2013. Moho and magmatic underplating in continental lithosphere. Tectonophysics, 609:605-619.
Wang C Y, Zhang X K, Wu Q J. 1994. The slippage structure revealed by deep seismic reflections in Jizhong Depression. Chinese Science Bulletin (in Chinese), 39(7):625-628.
Wu F Y. 1998. The material exchange at the crust-mantle boundary:evidence from igneous petrology. Earth Science Frontiers (in Chinese), 5(3):94-103.
Zhang J, Zhang H M, Chen X F. 2002. Characteristics of head wave in multi-layered half space. Acta Seismologica Sinica (in Chinese), 24(6):559-568.
Zhao G C, Cawood P A, Wilde S A, et al. 2000. Metamorphism of basement rocks in the Central Zone of the North China Craton:implications for Paleoproterozoic tectonic evolution. Precambrian Research, 103(1-2):55-88.
Zhao J M, Zhang X K, Zhao G Z, et al. 1999. Structure of crust-mantle transitional zone in different tectonic environments. Earth Science Frontiers (in Chinese), 6(3):165-172.
Zhao J M, Liu G D, Zhao G Z, et al. 2001. Crust-mantle transition beneath Tienshan Orogen and Junggar Basin and its dynamic implications. Science in China:Earth Science (in Chinese), 31(4):272-282.
Zheng X F, Ouyang B, Zhang D N, et al. 2009. Technical system construction of Data Backup Centre for China Seismograph Network and the data support to researches on the Wenchuan earthquake. Chinese Journal of Geophysics (in Chinese), 52(5):1412-1417, doi:10.3969/j.issn.0001-5733.2009.05.031.
Zhu R X, Xu Y G, Zhu G, et al. 2012. Destruction of North China Craton. Science in China:Earth Science (in Chinese), 42(8):1135-1159.
邓万明, 钟大赉. 1997. 壳-幔过渡带及其在岩石圈构造演化中的地质意义. 科学通报, 42(23):2474-2482.
邓阳凡, 李守林, 范蔚茗等. 2011. 深地震测深揭示的华南地区地壳结构及其动力学意义. 地球物理学报, 54(10):2560-2574, doi:10.3969/j.issn.0001-5733.2011.10.013.
樊祺诚, 张宏福, 隋建立等. 2005. 岩浆底侵作用与汉诺坝现今壳-幔边界组成——捕虏体岩石学与地球化学证据. 中国科学:D 辑, 35(1):1-14.
何永锋, 赵克常, 张献兵等. 2006. 壳-幔过渡带首波传播特征. 地球物理学进展, 21(4):1093-1098.
胡鸿翔, 林中洋, 边银菊等. 1996. 滇西地区壳幔过渡带性质的研究. 地震学报, 18(4):444-450.
国家测震台网数据备份中心. 2007. 国家测震台网地震波形数据. 中国地震局地球物理研究所, doi:10. 11998/SeisDmc/SN, http://www.seisdmc.ac.cn.
赖晓玲, 张先康, 方盛明. 2004. 青藏高原东北缘壳幔过渡带研究. 地震学报, 26(2):132-139.
李廷栋, 潘桂堂, 肖序常等. 2013. 青藏高原隆升的地质记录及机制. 广东:广东科技出版社.
邵济安, 韩庆军. 2000. 内蒙古东部早中生代壳幔过渡带——捕虏体岩石高温高压下弹性波速度实验证据. 中国科学:D 辑, 30(B12):154-160.
滕吉文. 2006. 地球深部壳-幔边界的层束精细结构与物理属性研究. 吉林大学学报:地球科学版, 36(1):1-23.
王椿镛, 张先康, 吴庆举. 1994. 冀中拗陷内深地震反射剖面揭示的滑脱构造. 科学通报, 39(7):625-628.
吴福元. 1998. 壳-幔物质交换的岩浆岩石学研究. 地学前缘, 5(3):94-103.
张坚, 张海明, 陈晓非. 2002. 垂向非均匀介质中首波特征分析. 地震学报, 24(6):559-568.
赵俊猛, 张先康, 赵国泽等. 1999. 不同构造环境下的壳-幔过渡带结构. 地学前缘, 6(3):165-172.
赵俊猛, 刘国栋, 赵国泽等. 2001. 天山造山带与准噶尔盆地壳幔过渡带及其动力学含义. 中国科学:D 辑, 31(4):272-282.
郑秀芬, 欧阳飚, 张东宁等. 2009. "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. 地球物理学报, 52(5):1412-1417, doi:10.3969/j.issn.0001-5733.2009.05.031.
朱日祥, 徐义刚, 朱光等. 2012. 华北克拉通破坏. 中国科学:地球科学, 42(8):1135-1159.