Seismic anisotropy in the uppermost mantle, back‐arc region of the northeast Japan arc: Petrophysical analyses of Ichinomegata peridotite xenoliths
作者： Katsuyoshi Michibayashi , Natsue Abe , Atsushi Okamoto , Takako Satsukawa , Kenta Michikura
DOI: 10.1029/2006GL025812
关键词:
摘要: [1] A dense network of seismic stations has been deployed across the northeast Japan arc to investigate mantle wedge structures. To attain independent petrophysical constraints, we determined properties Ichinomegata xenoliths from back-arc region that were brought surface lithosphere by volcanic eruptions. We calculated olivine and pyroxene crystal-preferred orientations single crystal elastic constants. The small magnitude measured S-wave splitting (delay time 0.22 s in area where entrained) can be explained average for an approximately 20-km thick horizontal anisotropic layer, indicating could one dominant sources anisotropy; this layer is possibly related deformation uppermost due spreading along arc.
elsevier.com
agu.org参考文章(19)
Walid Ben Ismaı̈l, David Mainprice, An olivine fabric database: an overview of upper mantle fabrics and seismic anisotropy Tectonophysics. ,vol. 296, pp. 145- 157 ,(1998) , 10.1016/S0040-1951(98)00141-3
Natsue Abe, Shoji Arai, Hisayoshi Yurimoto, Geochemical characteristics of the uppermost mantle beneath the Japan island arcs: implications for upper mantle evolution Physics of the Earth and Planetary Interiors. ,vol. 107, pp. 233- 248 ,(1998) , 10.1016/S0031-9201(97)00136-2
W. Ben-Ismail, G. Barruol, D. Mainprice, The Kaapvaal craton seismic anisotropy: Petrophysical analyses of upper mantle kimberlite nodules Geophysical Research Letters. ,vol. 28, pp. 2497- 2500 ,(2001) , 10.1029/2000GL012419
Antonio Rovelli, Alessandro Vuan, Giuliana Mele, Enrico Priolo, Enzo Boschi, Rarely observed short‐period (5–10 s) suboceanic Rayleigh waves propagating across the Tyrrhenian Sea Geophysical Research Letters. ,vol. 31, ,(2004) , 10.1029/2004GL021194
J. M. Brown, M. D. Collins, ELASTICITY OF AN UPPER MANTLE CLINOPYROXENE pacific rim conference on multimedia. ,vol. 26, pp. 7- 13 ,(1998) , 10.1007/S002690050156
Alain Vauchez, Carlos J. Garrido, Seismic properties of an asthenospherized lithospheric mantle: constraints from lattice preferred orientations in peridotite from the Ronda massif Earth and Planetary Science Letters. ,vol. 192, pp. 235- 249 ,(2001) , 10.1016/S0012-821X(01)00448-4
Emanuela Pera, David Mainprice, Luigi Burlini, Anisotropic seismic properties of the upper mantle beneath the Torre Alfina area (Northern Apennines, Central Italy) Tectonophysics. ,vol. 370, pp. 11- 30 ,(2003) , 10.1016/S0040-1951(03)00175-6
I. Kushiro, A petrological model of the mantle wedge and lower crust in the Japanese island arcs Magmatic processes : Physicochemical Principles. ,vol. 1, pp. 165- 181 ,(1987)
Adolphe Nicolas, Nikolas I. Christensen, Formation of Anisotropy in Upper Mantle Peridotites ‐ A Review Composition, Structure and Dynamics of the Lithosphere-Asthenosphere System. pp. 111- 123 ,(2013) , 10.1029/GD016P0111
Etienne Audoine, Martha K. Savage, Ken Gledhill, Anisotropic structure under a back arc spreading region, the Taupo Volcanic Zone, New Zealand Journal of Geophysical Research: Solid Earth. ,vol. 109, ,(2004) , 10.1029/2003JB002932