Crustal and upper mantle structure of northern Tibet imaged with magnetotelluric data

Journal of Geophysical Research: Solid Earth

Volumn 109, Issue 2, 2004, Pages

  Unsworth, Martyn ^a   Wei, Wenbo ^b   Jones, Alan G ^c   Li, Shenghui ^d   Bedrosian, Paul ^d   Booker, John ^d   Jin, Sheng ^b   Deng, Ming ^b   Tan, Handong ^b  

^a UNIVERSITY OF ALBERTA   (Canada)

^b CHINA UNIVERSITY OF GEOSCIENCES   (China)

^c GEOLOGICAL SURVEY OF CANADA   (Canada)

^d UNIVERSITY OF WASHINGTON   (United States)

Author keywords

Kunlun fault; Magnetotellurics; Qiangtang terrane; Tibetan Plateau

Indexed keywords

ELECTRICAL RESISTIVITY; ELECTROMAGNETIC SURVEY; LITHOSPHERE; MAGNETOTELLURIC METHOD; UPPER MANTLE;

ASIA; CHINA; EURASIA; FAR EAST; XIZANG;

EID: 2542425494     PISSN: 21699313     EISSN: 21699356     Source Type: Journal    
DOI: None     Document Type: Article

References (62)

1. Argand, E. (1924), La tectonique de l'Asie, Int. Geol. Congr. Rep. Sess., 13, 170-373.
2. 2O volcanism of Northwestern Tibet: Geochemistry and tectonic implications, Earth Planet. Sci. Lett., 111, 351-367.
3. Beaumont, C., R. A. Jamieson, M. H. Nguyen, and B. Lee (2001), Himalayan tectonics explained by extrusion of a low-viscosity crustal channel coupled to focused surface denudation, Nature, 414, 738-742.
4. Bedrosian, P. A., M. J. Unsworth, and F. Wang (2001), Structure of the Altyn Tagh Fault and Daxue Shan from magnetotelluric surveys: Implications for faulting associated with the rise of the Tibetan Plateau, Tectonics, 20, 474-486.
5. Chen, L., J. R. Booker, A. G. Jones, N. Wu, M. J. Unsworth, W. Wenbo, and H. Tan (1996), Electrically conductive crust in southern Tibet from INDEPTH magnetotelluric surveying, Science, 274, 1694-1696.
6. Chen, W. P., C. Y. Chen, and J. L. Nabelek (1999), Present day deformation of the Qaidam Basin with implications for intra-continental tectonics, Tectonophysics, 305, 165-181.
7. Clark, M., and L. Royden (2000), Topographic ooze: Building the eastern margin of Tibet by lower crustal flow, Geology, 28, 703-706.
8. Coward, M. P., W. S. F. Kidd, P. Yun, R. M. Shackelton, and Z. Hu (1988), The structure of the 1985 Tibet Geotraverse, Lhasa to Golmud. Philos. Trans. R. Soc. London, Ser. A., 327, 307-336.
9. Dewey, J., and K. Burke (1973), Tibetan, Variscan and Precambrian reactivation: Product of continental collision, J. Geol., 81, 683-692.
10. Dewey, J., R. M. Shackelton, C. Chang, and Y. Sun (1988). The tectonic evolution of the Tibetan Plateau. Philos. Trans. R. Soc. London., Ser. A., 327, 379-413.
11. Egbert, G. D. (1997), Robust multiple-station magnetotelluric data processing, Geophys. J. Int., 130, 475-496.
12. England, P. C., and G. A. Houseman (1989), Extension during continental convergence, with application to the Tibetan Plateau, J. Geophys. Res, 94, 17,561-17,579.
13. Galve, A., A. Hirn, J. Mei, J. Gallart, B. de Voogd, J. C. Lepine, J. Diaz, W. Youxue, and Q. Hui (2002), Modes of raising northeastern Tibet probed by explosion seismology, Earth Planet, Sci. Lett., 203, 35-43.
14. Griot, D. A., J. P. Montagner, and P. Tapponnier (1998), Phase velocity structure from Rayleigh and Love waves in Tibet and its neighboring regions, J. Geophys. Res., 103, 21,215-21,232.
15. Groom, R. W., and R. C. Bailey (1989). Decomposition of magnettotelluric impedance tensors in the presence of local three-dimensional galvanic distortion, J. Geophys. Res., 94, 1913-1925.
16. Hacker, B. R., E. Gnos, L. Ratschbacher, M. Grove, M. McWilliams, S. Sobolev, J. Wan, and Z. Wu (2000), Hot and dry deep crustal xenoliths from Tibet, Science, 287, 2463-2466.
17. Hirn, A., M. Sapin, J. C. Lepine, J. Diaz, and J. Mei (1997), Increase in melt fraction along a north south traverse below the Tibetan Plateau: Evidence from seismology, Tectonophysics, 273, 17-30.
18. Jones, A. G. (1988), Static shift of magnetotelluric data and its removal in a sedimentary basin environment. Geophysics, 53, 967-978.
19. Jones, A. G. (1999), Imaging the continental upper mantle using electromagnetic methods, Lithos, 48, 57-80.
20. Jones, A. G., A. D. Chave, G. D. Egbert, D. Auld, and K. Bahr (1989), A comparison of techniques for magnetotelluric response function estimates, J. Geophys Res., 94, 14,201-14,213.
21. Kapp, P., A. Yin, C. E. Manning, M. Murphy, T. M. Harrison, M. Spurlin, D. Lin, X. Deng, and C. Wu (2000), Blueschist-bearing metamorphic core complexes in the Qiangtang block reveal deep crustal structure of northern Tibet. Geology 28, 19-22.
22. Kidd, W. S. F., and P. Molnar (1988), Quaternary and Active faulting observed on the 1985 Academica Sinica-Royal Society Geotraverse of Tibet, Philos. Trans. R. Soc. London, Ser. A, 327, 337-363.
23. Kind, R., et al. (2002), Seismic images of crust and upper mantle 'beneath Tibet: Evidence for Eurasian plate subduction, Science, 298, 1219-1221.
24. Kosarev, G., R. Kind, S. V. Sobolev, X. Yuan, W. Hanka, and O. Oreshin (1999), Seismic evidence for a detached Indian lithospheric mantle beneath Tibet, Science, 283, 1306-1309.
25. Ledo, L, P. Queralt, A. Marti, and A. G. Jones (2002), Two-dimensional interpretation of three-dimensional magnetotelluric data: An example of limitations and resolution, Geophys. J. Int., 150, doi:10.1046/j.1365246X. 2002.01705.x, 127-139.
26. Leibecker, J., A. Gatzemeier, M. Honig, O. Kuras, and W. Soyer (2002), Evidence of electrical anisotropic structures in the lower crust and the upper mantle beneath the Rhenish Shield, Earth Planet. Sci. Lett., 202, 289-302.
27. Li, S., M. J. Unsworth, J. R. Booker, W. Wei, H. Tan, and A. G. Jones (2003), Partial melt or aqueous fluids in the Tibetan crust: Constraints from INDEPTH magnetotelluric data. Geophys. J. Int., 153, doi:10.1046/j.1365-246X. 2003.01850.x, 289-304.
28. s = 8.1 central Kunlun earthquake, Science, 296, 2015-2017.
29. Mackie, R. L., T. R. Madden, and J. T. Smith (1994), Three-dimensional electromagnetic modeling using finite difference equations: The magnetotelluric example, Radio Sci., 29, 923-935.
30. Matte, P., P. Tapponnier, N. Arnaud, L. Bourjot, J.-P. Avouac, P. Vidal, Q. Liu, Y. Pan, and Y. Wang (1996), Tectonics of western Tibet, between the Tarim and the Indus, Earth Planet. Sci. Lett., 142, 311-330.
31. McNamara, D. E., W. R. Walter, T. J. Owens, and C. J. Ammon (1997), Upper mantle velocity structure beneath the Tibetan Plateau from Pn travel time tomography, J. Geophys. Res., 102, 493-505.
32. McNeice, G. W., and A. J. Jones (2001), Multisite, multifrequency tensor decomposition of magnetotelluric data, Geophysics, 66, 158.
33. Metevier, F., Y. Gaudemer, P. Tapponnier, and B. Meyer (1998). Northeastward growth of the Tibet Plateau deduced from balanced reconstraction of two depositional areas: Thee Qaidam and Hexi Corridor basins, China, Tectonics, 17, 823-842.
34. 39Ar thermochronology on granitoids from the eastern Kunlun range (Qinghai. NW China), Earth Planet Sci. Lett., 171, 107-122.
35. Molnar, P. (1988), A review of geophysical constraints on the deep structure of the Tibetan Plateau, the Himalayas and the Karakorum and their tectonic implications, Philos. Trans. R. Soc. London. Ser. A, 326, 33-88.
36. Narod, B. B., and J. R. Bennest (1990), Ring-coure fluxgate magnetometers for use as observatory variometers, Phys. Earth Planet. Inter., 59, 23-28.
37. Nelson, K. D., et al. (1996), Partially molten middle crust beneath southern Tibet: Synthesis of Project INDEPTH results, Science, 274, 1684-1686.
38. n propagation beneath Tibet, Geophys. J. R. Astron. Sec., 72, 665-689.
39. Owens, T. J., and G. Zandt (1997), Implications of crustal property variations for models of Tibetan Plateau evolution, Nature, 387, 37-43.
40. Park, S. K., S. Thompson, A. Rybin, V. Batalev, and R. Bielinski (2003), Structural constraints in noetectonic studies of thrust faults from the magnetotelluric method, Kochkor Basin, Kyrgyz Republic, Tectonics, 22(2), 1013, doi:10.1029/2001TC001318.
41. Parkinson, W. D. (1962), The influence of continents and oceans on geomagnetic variations, Geophys. J. R. Astron. Soc., 6, 441-449.
42. Partzsch, G. M., F. R. Schilling, and J. Arndt (2000), The influence of partial melting on the electrical behavior of crustal rocks: Laboratory examinations, model calculations and geological interpretations, Tectonophysics, 317, 189-203.
43. Rapine, R., F. Tilmann, M. West, J. Ni, and A. Rodgers (2003), Crustal structure of northern and southern Tibet from surface wave dispersion analysis, J. Geophys. Res., 108(B2). 2120, doi:10.1029/2001JB000445.
44. Rodi, W., and R. L. Mackie (2001), Nonlinear conjugate gradients algorithm for 2-D magnetotelluric inversion, Geophysics, 66, 174-187.
45. Rogers, A. J., and S. Y. Schwartz (1998), Lithospheric structure of the Qingtang terrane, northern Tibetan Plateau, from complete regional waveform modeling: Evidence for partial melt, J. Geophys. Res., 103, 7137-7152.
46. Schmelling, H. (1995), Numerical models on the influence of partial melt on elastic and electric properties of rocks, 1. Elasticity and anelasticity, Phys. Earth Planet. Inter., 41, 34-57.
47. Shengye, Z., W. Sheng, and W. Jiaying(1996), Magnetotelluric sounding in the Qiangtang basin of Xizang (Tibet), J. China Univ. Geosci., 21, 198-202.
48. Tapponnier, P., Z. Xu, F. Roger, B. Meyer, N. Arnaud, G. Wittlinger, and Y. Jingsui (2001), Oblique stepwide rise and growth of the Tibetan Plateau, Science, 294, 1671-1677.
49. Turner, S., C. Hawkesworth, J. Liu, N. Rogers, S. Kelly, and P. van Calsteren (1993), Timing of Tibetan Plateau uplift constrained by analysis of volcanic rocks, Nature, 364, 50-54.
50. Unsworth, M. J., M. Eisel, G. D. Egbert, W. Siripunarvaporn, and P. A. Bedrosian (2000), Along-strike variations in the structure of the San Andreas Fault at Parkfield, California, Geophys. Res. Lett., 27, 3021-3024.
51. van der Woerd, J., F. J. Ryerson, P. Tapponnier, Y. Gaudemer, R. Finkel, A. S. Meriaux, M. Caffee, G. Zhao, and Q. He (1998), Holocene left-slip rate determined by cosmogenic surface dating on the Xidatan segment of the Kunlun fault (Qinghai, China), Geology, 26, 695-698.
52. van Ngoc, P., D. Boyer, P. Therme, X. Cheng Yuan, L. Li, and G. Yuan Jin (1986), Partial melting zones in the crust in southern Tibet from magnetotelluric results, Nature, 319, 310.
53. Vergne, J., G. Wittlinger, Q. Hui, P. Tapponnier, G. Poupinet, J. Mei, G. Herquel, and A. Paul (2002), Seismic evidence for stepwise thickening of the crust across the NE Tibetan Plateau, Earth Planet. Sci. Lett., 203, 25-33.
54. Wang, Q., et al. (2001), Present-day crustal deformation in China constrained by Global Positioning System measurements, Science, 294, 574-577.
55. Wannamaker, P. E., G. W. Hohmann, and S. Ward (1984), Magnetotelluric responses of three-dimensional bodies in layered earths, Geophysics, 49, 1517-1533.
56. Wei, W., et al. (2001), Detection of widespread fluids in the Tibetan crust by magnetotelluric studies, Science, 292, 716-718.
57. Willett, S. D., and C. Beaumont (1994), Subduction of Asian lithospheric mantle beneath Tibet inferred from models of continental collision, Nature, 369, 642-645.
58. Wittlinger, G., F. Masson, G. Poupinet, P. Tapponnier, G. Hequel, J. Guilbert, U. Achauer, X. Guinqi, and S. Danian (1996), Seismic tomography of northern Tibet and Kunlun. Evidence for crustal blocks and mantle velocity contrasts, Earth Planet. Sci. Lett., 139, 263-279.
59. Yin, A., and T. M. Harrison (2000), Geologic evolution of the Himalayan Tibetan Orogen, Annu. Rev. Earth Planet. Sci., 28, 211-280.
60. Zhao, W., and W. J. Morgan (1987), Injection of Indian crust into Tibetan crust: A two-dimensional finite element model study, Tectonics, 6, 489-504.
61. Zhao, W., K. D. Nelson and Project INDEPTH team (1993), Deep seismic reflection evidence for continental underthrusting beneath southern Tibet, Nature, 366, 557-559.
62. Zhu, L., and D. V. Helmberger (1998), Moho offset across the Northern margin of the Tibetan Plateau, Science, 281, 1170-1172.