The influence of olivine metastability on the dynamics of subduction

Details The influence of olivine metastability on the dynamics of subduction The influence of olivine metastability on the dynamics of subduction

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999e%26psl.165...55s&link_type=abstract

Earth and Planetary Science Letters, Volume 165, Issue 1, p. 55-66.

Mathematics

Logic

33

Scientific paper

Both seismological observations and mineral physics experiments suggest that old and cold subducting slabs might contain a wedge of metastable olivine (`MO'). Dynamically consistent models of subducting slabs, in which the kinetics of the olivine to spinel (wadsleyite or ringwoodite) transition is treated in a simplified way, are carried out to evaluate the buoyancy effect of MO on the subduction velocity. Assuming slab thicknesses according to the cooling half-space model, we find that MO forms in slabs with ages greater than approximately 70 Myr, and that a significant slowing down of subduction velocity occurs for ages greater than 100 Myr. Because a decrease in the subduction velocity for old lithospheric ages is not observed, our models suggest that the amount of MO in slabs is less than approximately 5000 km2 in cross section, and that for old lithosphere the cooling half-space model is not applicable.

Affiliated with

Also associated with

No associations

Rating

The influence of olivine metastability on the dynamics of subduction 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 influence of olivine metastability on the dynamics of subduction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The influence of olivine metastability on the dynamics of subduction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1190944