The wet Nicaraguan slab

Details The wet Nicaraguan slab The wet Nicaraguan slab

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30b..70a&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 2, pp. 70-1, CiteID 1098, DOI 10.1029/2002GL015649

Physics

22

Mineralogy, Petrology, And Mineral Physics: Metamorphic Petrology, Seismology: Body Wave Propagation

Scientific paper

Nicaraguan volcanoes show globally high concentrations of geochemical tracers from dehydration of subducting crust, which may reflect a slab with unusually high amounts of H2O. To test this possibility, we measure seismic velocities at the top of the subducted plate and compare them with predictions for hydrated mafic rocks. Regional seismic P waves for intraslab events at 100-150 km depth show a high-frequency late arrival, apparently trapped in a low-velocity waveguide 2.5-6 km thick at the top of the downgoing plate, 14.5 +/- 2.2% slower than surrounding mantle. The velocities can be explained by >=5 wt % H2O in the subducted crust, 2-3 times the hydration inferred for other slabs by similar methods. This interpretation implies extensive hydration of the Cocos Plate off Nicaragua, perhaps enhanced by up-dip fluid flow within the slab at >100 km depth.

Affiliated with

Also associated with

No associations

Rating

The wet Nicaraguan 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 The wet Nicaraguan slab, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The wet Nicaraguan slab will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1527593