Projects per year
Abstract
In this article, we propose a new inversion scheme to calculate the melt volume fractions from observed seismic anomalies in a lowvelocity layer (LVL) located atop the mantle transition zone. Our method identifies the tradeoffs in the seismic signature caused by temperature, solid composition, melt volume fraction, and dihedral angle at the solidmelt interface. Using the information derived from the amplitude of PtoS conversions beneath the western US, we show that the multiple permissible solutions for melt volume fractions are correlated to each other. Any possible solution can be directly transformed into alternative solutions whilst leaving the model output unchanged. Hence, the additional solutions can be rapidly derived given an initial solution. The calculation of multiple solutions reveals the universal properties of the whole range of solutions. A regionalaveraged melt volume fraction of at least 0.5% occurs in every solution, even though a unique interpretation does not exist.
Original language  English 

Article number  106502 
Journal  Physics of the Earth and Planetary Interiors 
Early online date  4 May 2020 
DOIs  
Publication status  Epub ahead of print  4 May 2020 
Projects
 1 Finished

Three dimensional modeling of dynamic microstructure
HierMajumder, S.
1/07/12 → 30/06/16
Project: Research