DTM talk

by cbegheinNews, UncategorizedPosted on Comments are Disabled

C.B. talked about the mantle transition zone and the Pacific plate at DTM. Fun and busy day meeting with staff and postdocs

IMG_6578

Press release

by cbegheinNews, UncategorizedPosted on Comments are Disabled

UCLA press release of our Science paper

This figure illustrates the Earth’s upper mantle beneath the Pacific ocean. The orange layer represents the deformable, warm asthenosphere in which there is active mantle flow. The green layer on top represents the lithospheric plate, which forms at the mid ocean ridge, then cools down and thickness as it moves away from the ridge. The cooling of the plate overprints a compositional boundary that forms at the ridge by dehydration melting and is preserved as the plate ages. The more easily deformable, hydrated rocks align with mantle flow. The directions of past and present-day mantle flow can be detected by seismic waves, and changes in the alignment of the rocks inside and at the bottom of the plate can be used to identify layering. CREDIT: Nicholas Schmerr (University of Maryland)
This figure illustrates the Earth’s upper mantle beneath the Pacific ocean. The orange layer represents the deformable, warm asthenosphere in which there is active mantle flow. The green layer on top represents the lithospheric plate, which forms at the mid ocean ridge, then cools down and thickness as it moves away from the ridge. The cooling of the plate overprints a compositional boundary that forms at the ridge by dehydration melting and is preserved as the plate ages. The more easily deformable, hydrated rocks align with mantle flow. The directions of past and present-day mantle flow can be detected by seismic waves, and changes in the alignment of the rocks inside and at the bottom of the plate can be used to identify layering. CREDIT: Nicholas Schmerr (University of Maryland)

Paper submitted

by cbegheinNews, UncategorizedPosted on Comments are Disabled

Paper entitled “Three-dimensional variations in Love and Rayleigh wave azimuthal anisotropy for the upper 800 km of the mantle” by Yuan and Beghein on SH azimuthal anisotropy submitted to Journal of Geophysical Research – Solid Earth

2013 Gordon conference

by cbegheinNews, UncategorizedPosted on Comments are Disabled
Group picture taken at the 2013 Earth Interior Gordon Conference
Group picture taken at the 2013 Earth Interior Gordon Conference

CB presents a poster at the Gordon Research Conference:

Beghein, C., and Yuan, K., “Changes in seismic anisotropy at upper mantle phase transitions”, Gordon Research Conference Interior of the Earth, 2-7 June 2013

Paper accepted

by cbegheinNews, UncategorizedPosted on Comments are Disabled

Our paper “Seismic anisotropy changes across upper mantle phase transitions” was accepted for publication in Earth and Planetary Science Letters. Good job Kaiqing!

UCLA seminar

by cbegheinNews, UncategorizedPosted on Comments are Disabled

C.B. gives seismology seminar at UCLA on “Changes in seismic anisotropy at the mantle transition zone boundaries” Abstract: The mantle transition zone (MTZ) is defined by discontinuities in seismic wave velocities at 410 km and 670 km depth that mostly result from phase changes in the olivine structure. Because the MTZ is believed to play …

Read more “UCLA seminar”