Sulfide melts and long-term low seismic wavespeeds in lithospheric and asthenospheric mantle

Details Sulfide melts and long-term low seismic wavespeeds in lithospheric and asthenospheric mantle Sulfide melts and long-term low seismic wavespeeds in lithospheric and asthenospheric mantle

Jun 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3811301h&link_type=abstract

Geophysical Research Letters, Volume 38, Issue 11, CiteID L11301

Physics

Mineralogy And Petrology: Magma Genesis And Partial Melting (1037), Mineralogy And Petrology: Mantle Processes (1038), Seismology: Body Waves, Seismology: Mantle (1212, 1213, 8124), Tectonophysics: Tomography (6982, 7270)

Scientific paper

Some studies of lithospheric and asthenospheric seismic structure, report mantle velocities as low as ˜4% below the reference models used. While these low wavespeeds may be attributed to thermal effects in tectonically young or actively volcanic regions, in older, tectonically stable regions low velocity anomalies apparently persist even past the decay time of any thermal perturbation, rendering such a mechanism implausible. Low volume melts can also reduce wavespeeds, but their buoyancy should drain them upward away from source regions, preventing significant accumulation if they are able to segregate. Sulfide, ubiquitous as inclusions in lithospheric mantle xenoliths, forms dense, non-segregating melts at temperatures and volatile fugacities characteristic of even old lithospheric mantle. We show that 1-5 volume percent sulfide melts can act to permanently create reductions up to 5.5% in seismic wavespeeds in areas of the lithosphere and the asthenosphere disturbed by prior melting events that carry and concentrate sulfide.

Affiliated with

Also associated with

No associations

Rating

Sulfide melts and long-term low seismic wavespeeds in lithospheric and asthenospheric mantle 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 Sulfide melts and long-term low seismic wavespeeds in lithospheric and asthenospheric mantle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sulfide melts and long-term low seismic wavespeeds in lithospheric and asthenospheric mantle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-916957