Topography of the 660-km discontinuity beneath northeast China: Implications for a retrograde motion of the subducting Pacific slab

Details Topography of the 660-km discontinuity beneath northeast China: Implications for a retrograde motion of the subducting Pacific slab Topography of the 660-km discontinuity beneath northeast China: Implications for a retrograde motion of the subducting Pacific slab

Jan 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3501302l&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 1, CiteID L01302

Physics

3

Seismology: Subduction Zones (1207, 1219, 1240), Geodesy And Gravity: Earth'S Interior: Dynamics (1507, 7207, 7208, 8115, 8120), Seismology: Mantle (1212, 1213, 8124)

Scientific paper

Clear S to P converted waves at the 660-km discontinuity (S 660 P) are observed at stacked seismograms of deep earthquakes occurring in northeast China and Japan Sea recorded by broadband seismic arrays in North America and Europe. Differential travel times between the S 660 P and P waves are used to constrain depth variations of the 660 beneath northeast China. A rapid change in the depth of the 660 is observed within a narrow longitudinal range of 130.8°E-131.4°E, where the lower boundary of the subducting slab encounters the 660. Towards the west, the 660 deepens steadily as it approaches the coldest core of the slab. The maximum depression occurs at the west end of the studied region with an amplitude of ~20 km. To the east, the 660 appears to be flat, showing no obvious effect of the subducting slab. These observations are consistent with a scenario for a retrograde moving Pacific slab lying over the upper and lower mantle boundary progressively from west to east.

Affiliated with

Also associated with

No associations

Rating

Topography of the 660-km discontinuity beneath northeast China: Implications for a retrograde motion of the subducting Pacific slab does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Topography of the 660-km discontinuity beneath northeast China: Implications for a retrograde motion of the subducting Pacific slab, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Topography of the 660-km discontinuity beneath northeast China: Implications for a retrograde motion of the subducting Pacific slab will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-755054