参考文献:1. Backus G, Gilbert F (1968) The resolving power of gross earth data. Geophys J R Astr Soc 16:169-05 CrossRef 2. Bai ZM, Wang CY (2003) Tomographic investigation of the upper crustal structure and seismotectonic environment in Yunnan Province. Acta Seismol Sin 16(2):127-39 CrossRef 3. Bai DH, Unsworth MJ, Meju MA, Ma XB, Teng JW, Kong XR, Sun Y, Sun J, Wang LF, Jiang CS, Zhao CP, Xiao PF, Liu M (2010) Crustal deformation of the eastern Tibetan Plateau revealed by magnetotelluric imaging. Nat Geosci 3:358-62 CrossRef 4. Caldwell WB, Klemperer SL, Rai SS, Lawrence JF (2009) Partial melt in the upper-mantle crust of the northwest Himalaya revealed by Rayleigh wave dispersion. Tectonophysics 477:58-5 CrossRef 5. Chang LJ, Wang CY, Ding ZF (2006) A study on SKS splitting beneath the Yunnan region. Chin J Geophys 49:167-75 (in Chinese with English abstract) 6. Chen Y, Badal J, Zhang ZJ (2009) Radial anisotropy in the crust and upper mantle beneath the Qinghai-Tibet Plateau and surrounding regions. J Asian Earth Sci 36:302-89 7. Chen Y, Badal J, Hu JF (2010) Love and Rayleigh wave tomography of the Qinghai-Tibet plateau and surrounding areas. Pure Appl Geophys 167:1171-203 CrossRef 8. Clark MK, Royden LH (2000) Topographic ooze: building the eastern margin of Tibet by lower crustal flow. Geology 28:703-06 CrossRef 9. Ditmar PG, Yanovskaya TB (1987) A generalization of the Backus-Gilbert method for estimation of lateral variations of surface wave velocity. Izv Phys Solid Earth 23:470-77 10. Herrmann RB, Ammon CJ (2004) Computer Programs in Seismology, St. Louis. (http://www.eas.slu.edu/eqc/eqccps.html). Accessed 28 Nov 2004 11. Hu JF, Hu YL, Xia JY, Chen Y, Zhao H, Yang HY (2008) Crust-mantle velocity structure of S wave and dynamic process beneath Burma Arc and its adjacent regions. Chin J Geophys 51(1):140-48 (in Chinese with English abstract) 12. Huang J, Zhao D (2006) High-resolution mantle tomography of China and surrounding regions. J Geophys Res 111:B09305. doi:10.1029/2005JB004066 13. Huang J, Zhao D, Zheng S (2002) Lithospheric structure and its relationship to seismic and volcanic activity in southwest China. J Geophys Res 107(B10):2255. doi:10.1029/2000JB000137 CrossRef 14. Huang J, Liu XJ, Su YJ, Wang BS (2012) Imaging 3-D crustal P-wave velocity structure of western Yunnan with bulletin data. Earthq Sci 25:151-60 CrossRef 15. Hwang HJ, Mitchell BJ (1986) Interstation surface wave analysis by frequency domain wiener deconvolution and modal isolation. Bull Seismol Soc Am 76:847-64 16. Jiang CS (1998) Distribution characteristics of Tengchong volcanoes in the Cenozoic Era. J Seismol Res 21(4):309-19 (in Chinese with English abstract) 17. Laske G, Masters G (1997) A global digital map of sediment thickness. EOS Trans AGU 78:F483 18. Lei JS, Zhao DP, Su Y (2009) Insight into the origin of the Tengchong intraplate volcano and seismotectonics in southwest China from local and teleseismic data. J Geophys Res 114:B05302 19. Lev E, Long MD, van der Hilst RD (2006) Seismic anisotropy from shear-wave splitting in Eastern Tibet reveals changes in lithospheric deformation. Earth Planet Sci Lett 251:293-04 CrossRef 20. Li C, van der Hilst R, Meltzer A, Engdahl E (2008a) Subduction of the Indian lithosphere beneath the Tibetan Plateau and Burma. Earth Planet Sci Lett 274:157-68 CrossRef 21. Li YH, Wu QJ, Zhang RQ, Tian XB, Zeng RS (2008b) The crust and upper mantle structure beneath Yunnan from joint inversion of receiver functions and Rayleigh wave dispersion data. Phys Earth Planet Inter 170:134-46 CrossRef 22. Li YH, Wu QJ, Pan JT, Zhang FX, Yu DX (2013) An upper-mantle S-wave velocity model for East Asia from Rayleigh wave tomography. Earth Planet Sci Lett 377-78:367-77 CrossRef 23. Li YH, Gao MT, Wu QJ (2014) Crustal thickness map of the Chinese mainland from teleseismic receiver functions. Tectonophysics 611(25):51-0 CrossRef 24. Shapiro NM, Ritzwoller MH (2002) Monte-Carlo inversion for a global shear-velocity model of the crust and upper mantle. Geophys J Int 151:88-05 CrossRef 25. Sun J, Xu C, Jiang Z (1989) Electricity structure of the crust and upper mantle in western Yunnan and its relation to crust activity. Seismol Geol 11(1):35-9 (in Chinese with English abstract) 26. Sun Y, Niu FL, Liu HF, Chen YL, Liu JX (2012) Crustal structure and deformation of the SE Tibetan plateau revealed by receiver function data. Earth Planet Sci Lett 349-50:186-97 CrossRef 27. Sun XX, Bao XW, Xu MJ, Eaton DW, Song XD, Wang LS, Ding ZF, Mi N, Yu DY, Li H (2014) Crustal structure beneath SE Tibet from joint analysis of receiver functions and Rayleigh wave dispersion. Geophys Res Lett. doi:10.1002/2014GL059269 28. Tapponnier P, Peltzer G, LeDain AY, Armijo R, Cobbold P (1982) Propagating extrusion tectonics in Asia: new insights from simple experiments with plasticine. Geology 10:611-16 CrossRef 29. Unsworth MJ, Jones AG, Wei W, Marquis G, Gokarn SG, Spratt JE, The INDEPTH-MT Team (2005) Crustal rheology of the Himalaya and Southern Tibet inferred from magnetotelluric data. Nature 438:78-1. doi:10.1038/nature04154 CrossRef 30. Wang CY, Huangfu G (2004) Crustal structure in Tengchong volcano geothermal area, western Yuannan, China. Tectonophysics 380:69-7 CrossRef 31. Wang CY, Chan WW, Mooney WD (2003) Three-dimensional velocity structure of crust and uppermantle in southwestern China and its tectonic implications. J Geophys Res 108(B9):176-93. doi:10.1029/2002JB0019732442 32. Wang CY, Flesch LM, Silver PG, Chang LJ, Chan WW (2008) Evidence for mechanically coupled lithosphere in central Asia and resulting implications. Geology 36(5):363-66 CrossRef 33. Wang CY, Lou H, Wang XL, Qin JZ, Yang RH, Zhao JM (2009) Crustal structure in Xiaojiang fault zone and its vicinity. Earthq Sci 22:347-56 CrossRef 34. Wu Q, Zu J, Xie Y (1988) Basical geothermal characteristics in Yunnan Province. Seismol Geol 10(4):177-83 (in Chinese with English abstract) 35. Wu QJ, Zheng XF, Pan JT, Zhang FX, Zhang GC (2009) Measurement of interstation phase velocity by wavelet transformation. Earthq Sci 22:425-29 CrossRef 36. Xu XM, Ding ZF, Shi DN, Li XF (2013) Receiver function analysis of crustal structure beneath the eastern Tibetan plateau. J Asian Earth Sci 73:121-27 CrossRef 37. Yang Y, Zheng Y, Chen J, Zhou SY, Celyan S, Sandvol E, Tilmann F, Priestley K, Hearn TM, Ni JM, Brown LD, Ritzwoller Michael H (2010) Rayleigh wave phase velocity maps of Tibet and the surrounding regions from ambient seismic noise tomography. Geochem Geophys Geosyst 11:Q08010. doi:10.1029/2010GC003119 CrossRef 38. Yang Y, Ritzwoller MH, Zheng Y, Levshin AL, Xie Z (2012) A synoptic view of the distribution and connectivity of the mid-crustal low velocity zone beneath Tibet. J Geophys Res 117:B04303. doi:10.1029/2011JB008810 39. Yanovskaya TB (1997) Resolution estimation in the problems of seismic ray tomography. Izv Phys Solid Earth 33(9):762-65 40. Yanovskaya TB, Ditmar PG (1990) Smoothness criteria in surface wave tomography. Geophys J Int 102:63-2 CrossRef 41. Yanovskaya TB, Kazima E, Antonova L (1998) Structure of the crust in the Black Sea and adjoining region. J Seismol 2:303-16 CrossRef 42. Yao HJ, Beghein C, van der Hilst RD (2008) Surface wave array tomography in SE Tibet from ambient seismic noise and two-station analysis-II. Crustal and upper-mantle structure. Geophys J Int 173:205-19 CrossRef 43. Yao H, van der Hilst RD, Montagner JP (2010) Heterogeneity and anisotropy of the lithosphere of SE Tibet from surface wave array tomography. J Geophys Res 115:B12307. doi:10.1029/2009JB007142 CrossRef 44. Zhang ZJ, Bai ZM, Wang CY (2005) Crustal structure of Gondwana- and Yangtze-typed blocks: An example by wide-angle seismic profile from Menglian to Malong in western Yunnan. Sci China 48(11):1828-836 CrossRef 45. Zhang ZJ, Deng YF, Teng JW, Wang CY, Gao R, Chen Y, Fan WM (2011) An overview of the crustal structure of the Tibetan Plateau after 35?years of deep seismic soundings. J Asian Earth Sci 40:977-89 CrossRef 46. Zhang EH, Lou H, Jia SX, Li YH (2013) The deep crust structure characteristics beneath western Yunnan. Chin J Geophys 56(6):1915-927 (in Chinese with English abstract)
作者单位:Yonghua Li (1) (2) Jiatie Pan (2) Qingju Wu (1) (2) Zhifeng Ding (1) (2)
1. Key Laboratory of Seismic Observation and Geophysical Imaging, China Earthquake Administration, Beijing, 100081, China 2. Institute of Geophysics, China Earthquake Administration, Beijing, 100081, China
ISSN:1867-8777
文摘
A shear-wave velocity model of the crust and uppermost mantle beneath the SE Tibetan plateau was derived by inverting Rayleigh-wave group-velocity measurements of periods between 10 and 70?s. Rayleigh-wave group-velocity dispersions along more than 3,000 interstation paths were measured based on analysis of teleseismic waveform data recorded by temporary seismic stations. These observations were then utilized to construct 2D group-velocity maps in the period range of 10-0?s. The new group-velocity maps have an enhanced resolution compared with previous global and regional group-velocity models in this region because of the denser and more uniform data coverage. The lateral resolution across the region is about 0.5° for the periods used in this study. Local dispersion curves were then inverted for a 3D shear-wave velocity model of the region by applying a linear inversion scheme. Our 3D shear-wave model confirms the presence of low-velocity zones (LVZs) in the crust beneath the northern part of this region. Our imaging shows that the upper-middle crustal LVZ beneath the Tengchong region is isolated from these LVZs beneath the eastern and northern part of this region. The upper–middle crustal LVZ may be regarded as evidence of a magma chamber in the crust beneath the Tengchong Volcanoes. Our model also reveals a slow lithospheric structure beneath Tengchong and a fast shield-like mantle beneath the stable Yangtze block.