Anomalous deepening of a seismic belt in the upper-plane of the double seismic zone in the Pacific slab beneath the Hokkaido corner: Possible evidence for thermal shielding caused by subducted forearc crust materials

Earth and Planetary Science Letters

Volumn 290, Issue 3-4, 2010, Pages 415-426

  Kita, Saeko ^a   Okada, Tomomi ^a   Hasegawa, Akira ^a   Nakajima, Junichi ^a   Matsuzawa, Toru ^a  

^a TOHOKU UNIVERSITY   (Japan)

Author keywords

dehydration embrittlement; eclogite forming phase transformation; Hokkaido corner; intraslab earthquakes; the upper plane seismic belt

Indexed keywords

ECLOGITES; FORMING PHASE; HOKKAIDO; THE UPPER-PLANE SEISMIC BELT;

DEHYDRATION; DEWATERING; EARTHQUAKES; EMBRITTLEMENT; INTERMETALLICS; METAMORPHIC ROCKS;

PHASE TRANSITIONS;

ECLOGITE; INVERSION TECTONICS; LOW VELOCITY ZONE; SEISMIC TOMOGRAPHY; SEISMIC VELOCITY; SEISMIC ZONE; SLAB; SUBDUCTION;

HOKKAIDO; HONSHU; JAPAN; TOHOKU;

EID: 75249090415     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.epsl.2009.12.038     Document Type: Article

References (37)

1. Abers G.A. Seismic low-velocity layer at the top of subducting slabs beneath volcanic arcs: observations, predictions, and systematics. Phys. Earth Planet. Inter. 149 (2005) 7-29
2. Christensen N.I., and Mooney W.D. Seismic velocity structure and composition of the continental crust: a global view. J. Geophys. Res. 100 B7 (1995) 9,761-9,788
3. 2O subduction beyond arcs. Geochem. Geophys. Geosyst. 9 3 (2008) Q03001 10.1029/2007GC001707
4. 2O content. J. Geophys. Res. 108 B1 (2003) 2029 10.1029/2001JB001127
5. Hacker B.R., Peacock S.M., Abers G.A., and Holloway S.D. Subduction factory: 2. Are intermediate-depth earthquakes in subducting slabs linked to metamorphic dehydration reactions?. J. Geophys. Res. 108 B1 (2003) 2030 10.1029/2001JB001129
6. Hasegawa A., Umino N., and Takagi A. Double-planed structure of the deep seismic zones in the northeastern Japan arc. Tectonophysics 47 (1978) 43-58
7. Hasegawa A., Horiuchi S., and Umino N. Seismic structure of the northeastern Japan convergent margin: a synthesis. J. Geophys. Res. 99 (1994) 22,295-22,311
8. Hasegawa A., Nakajima J., Kita S., Okada T., Matsuzawa T., and Kirby S.H. Anomalous deepening of a belt of intraslab earthquakes in the Pacific slab crust under Kanto, central Japan: possible anomalous thermal shielding, dehydration reactions, and seismicity caused by shallower cold slab material. Geophys. Res. Lett. 34 L09305 (2007) 10.1029/2007GL029616
9. Horiuchi S., Emura K., and Hirasawa T. Reliability of pressure and tension axes determined by initial motions of P-waves from deep earthquakes in and near Japan: the use of J. M. A. network. J. Seismol. Soc. Jpn. 25 1 (1972) 92-104
10. Igarashi T., Matsuzawa T., and Hasegawa A. Repeating earthquakes and interplate aseismic slip in the northeastern Japan subduction zone. J. Geophys. Res. 108 B5 (2003) 2249 10.1029/2002JB001920
11. Ito T., and Iwasaki T. New development on crustal studies on arc-arc collision zone. Bull. Earthq. Res. Inst. Univ. Tokyo 77 (2002) 87-96
12. Katsumata K., Wada N., and Kasahara M. Newly imaged shape of the deep seismic zone within the subducting Pacific plate beneath the Hokkaido corner, Japan-Kurile arc-arc junction. J. Geophys. Res. 108 B12 (2003) 2565 10.1029/2002JB002175
13. Kimura G. Oblique subduction and collision: forearc tectonics of the Kuril arc. Geology 14 (1986) 404-407
14. Kirby S.H. Intraslab earthquakes and phase changes in subducting lithosphere. Rev. Geophys. 33 S1 (1995) 287-297
15. Kirby S.H., Engdahl E.R., and Denlinger R. Intermediate-depth intraslab earthquakes and arc volcanism as physical expressions of crustal and uppermost mantle metamorphism in subducting slabs. In: Bebout G.E., et al. (Ed). Subduction: Top to Bottom, Geophysical Monograph Ser 96 (1996), AGU, Washington, D.C. 347-355
16. Kissling E., Ellsworth W.L., Eberhart-Phillips D., and Kradolfer U. Initial reference models in local earthquake tomography. J. Geophys. Res. 99 B10 (1994) 19,635-19,646
17. Kita S., Okada T., Nakajima J., Matsuzawa T., and Hasegawa A. Existence of a seismic belt in the upper plane of the double seismic zone extending in the along-arc direction at depths of 70-100 km beneath NE Japan. Geophys. Res. Lett. 33 L24310 (2006) 10.1029/2006GL028239
18. Nakajima J., and Hasegawa A. Anomalous low-velocity zone and linear alignment of seismicity along it in the subducted Pacific slab beneath Kanto, Japan: reactivation of subducted fracture zone?. Geophys. Res. Lett. 33 L16309 (2006) 10.1029/2006GL026773
19. Nakajima J., Tsuji Y., and Hasegawa A. Seismic evidence for thermally-controlled dehydration reaction in subducting oceanic crust. Geophys Res Lett. 33( L03303 (2009) 10.1029/2008GL036865
20. Nishiyama T. Mantle hydrology in a subduction zone: a key to episodic geologic events, double Wadati-Benioff zones and magma genesis. Mathematical Seismology, VII, Report of the Institute of Statistical Mathematics, Tokyo 34 (1992) 31-67
21. Omori S., Kita S., Maruyama S., and Santosh M. Pressure-temperature conditions of ongoing regional metamorphism beneath the Japanese Islands. Gondwana Res. 16 (2009) 458-469
22. Peacock S.M., and Wang K. Seismic consequences of warm versus cool subduction metamorphism: examples from southwest and northeast Japan. SCIENCE 286 5441 (1999) 937-939
23. Raleigh C.B. Tectonic implications of serpentinite weakening. Geophys. J. R. Astr. Soc. 14 (1967) 113-118
24. Raleigh C.B., and Paterson M.S. Experimental deformation of serpentinite and its tectonic implications. J. Geophys. Res. 70 (1965) 3965-3985
25. Rondenay S., Abers G.A., and van Keken P.E. Seismic imaging of subduction zone metamorphism. Geology 36 (2008) 275-278
26. Seno T., and Yamanaka Y. Double seismic zones, compressional deep trench-outer rise events and superplumes. In: Bebout G.E., et al. (Ed). Subduction: Top to Bottom, Geophysical Monograph Ser. 96 (1996), AGU, Washington, D.C 347-355
27. Tanaka, A., Yamano, M., Yano Y., and Sasada, M., 2004, Geothermal Gradient and Heat Flow Data in and around Japan, Digital Geoscience Map DGM P-5, Geological Survey of Japan.
28. Thurber C.H., and Eberhart-Phillips D. Local earthquake tomography with flexible gridding. Comput. Geosci. 25 (1999) 809-818
29. Tsuji Y., Nakajima J., and Hasegawa A. Tomographic evidence for hydrated oceanic crust of the Pacific slab beneath northeastern Japan: implications for water transportation in subduction zones. Geophys. Res. Lett. 35 L14308 (2008) 10.1029/2008GL034461
30. Tsumura N., Ikawa H., Ikawa T., Shinohara M., Ito T., Arita K., Moriya T., Kimura G., and Ikawa T. Delamination-wedge structure beneath the Hidaka Collision Zone, central Hokkaido, Japan inferred from seismic reflection profiling. Geophys. Res. Lett. 26 8 (1999) 1057-1060
31. Uchida N., Matsuzawa T., Hasegawa A., and Igarashi T. Interplate quasi-static slip off Sanriku, NE Japan, estimated from repeating earthquakes. Geophys. Res. Lett. 30 15 (2003) 1801 10.1029/2003GL017452
32. Ueno H., Hatakeyama S., Aketagawa T., Funasaki J., and Hamada N. Improvement of hypocenter determination procedures in the Japan Meteorological Agency (in Japanese). Quart. J. Seism. 65 (2002) 123-134
33. Waldhauser F., and Ellsworth W.L. A double-difference earthquake location algorithm: method and application to the northern Hayward Fault, California. Bull. Seismol. Soc. Am. 90 (2000) 1353-1368
34. Zhang H., and Thurber C.H. Double-difference tomography: the method and its application to the Hayward fault, California. Bull. Seismol. Soc. Am. 93 (2003) 1875-1889
35. Zhang H., and Thurber C.H. Development and applications of double-difference seismic tomography. Pure Appl. Geophys. 163 (2006) 373-403
36. Zhang H., Thurber C.H., Shelly D.R., Ide S., Beroza G.C., and Hasegawa A. High-resolution subducting-slab structure beneath northern Honshu, Japan, revealed by double-difference tomography. Geology 32 (2004) 361-364
37. Zhao D., Matsuzawa T., and Hasegawa A. Morphology of the subducting slab boundary and its relationship to the interplate seismic coupling. Phys. Earth Planet. Inter. 102 (1997) 89-104