Strong, multi-scale heterogeneity in the Earth's lowermost mantle
Evidence from Bayesian tomography using global dataset of P-waves sensitive to the lowermost mantle

A SYNTHETIC EXPERIMENT FOR MULTI-SCALE STRUCTURE RECOVERY


Synthetic test demonstrating the resolving power of various datasets used in imaging. On the left are the results for using a single dataset sensitive to the lowermost mantle, and on the right are the results for using the complete dataset in this study. The top row shows the actual model (input model), the middle row shows the mean of the recovered model, and the bottom row shows the standard deviation. These maps were computed after 700,000 iterations.

TOMOGRAM OF THE LOWERMOST MANTLE WITH UNCERTAINTY


(A) P-wave velocity perturbations from the ak135 model41 and (B) corresponding standard deviation. (C) Posterior probability distributions of data noise in seconds for all three types of differential travel time data (top), of the number of Voronoi cells used to describe the model (middle) and the average number of cells as a function of iteration number (bottom). Horizonal axes correspond to the range of priors for data noise and number of Voronoi cells.

Article:
Strong, Multi-Scale Heterogeneity in Earth's Lowermost Mantle

Nature - Scientific Reports, DOI:10.1038/srep18416, 2015.

by H. Tkalčić, M.K. Young, J.B. Muir, D.R. Davies & M. Mattesini

News selection:
ANU Press Release Youtube UK Daily Mail Science Newsline Twitter

Article published by Scientific Reports as Open Access. Copyright (2015) Nature Publishing Group:

Strong, multi-scale heterogeneity in Earth's lowermost mantle, Scientific Reports 6, doi:10.1038/srep18416, 2013.

back to homepage