Physics – Geophysics
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3703308c&link_type=abstract
Geophysical Research Letters, Volume 37, Issue 3, CiteID L03308
Physics
Geophysics
4
Geochemistry: Composition Of The Mantle, Exploration Geophysics: Seismic Methods (3025, 7294), Mineral Physics: Elasticity And Anelasticity, Mineral Physics: Equations Of State
Scientific paper
Most of the lower mantle is relatively simple in terms of seismic structure. Lateral variations are weaker compared to its bottom part and to the upper mantle and seismic velocities increase smoothly with depth. To a first order, these features appear consistent with the adiabatic compression of a homogeneous medium. Here we show, instead, that seismic data require a change of chemical and/or thermal state with depth below ˜1600 km, if the effect of the spin-transition of Fe2+ in ferropericlase on the elastic signature of a typical lower mantle assemblage is taken into account. The inferred thermochemical structure helps to reconcile geochemical and geophysical observations and has profound implications on the dynamical evolution of our planet.
Cammarano Fabio
Marquardt Hauke
Speziale Simone
Tackley Paul J.
No associations
LandOfFree
Role of iron-spin transition in ferropericlase on seismic interpretation: A broad thermochemical transition in the mid 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 Role of iron-spin transition in ferropericlase on seismic interpretation: A broad thermochemical transition in the mid mantle?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Role of iron-spin transition in ferropericlase on seismic interpretation: A broad thermochemical transition in the mid mantle? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1091546