Simulation of a salt dome using 2D linear and nonlinear inverse modeling of residual gravity field data

Year 2019, Volume: 160 Issue: 160, 231 - 244, 27.12.2019

Soheyl Pourreza Farnush Hajızadeh

https://doi.org/10.19111/bulletinofmre.502021

Cited By: 1

Abstract

In gravity field inversion we usually dealing with underdetermined
problems and for obtaining realistic solutions can introduce  a depth-weighting function to the inversion
algorithm. We employ a linear inversion method for determining the underground
density distribution of the gravity causative mass. The validation and accuracyof
method is tested on two synthetic gravity anomaly from different models, while
the data are noise- free and corrupted with noise. In this paper, We also invert
the 2D gravity anomaly produced by a salt dome from the northwest of Iran. The salt domes in the region under
investigation are a rich source of Potash. The inverted structure demonstrate on
average a depth to top and bottom of 27 m and 65 m, respectively. For
comparison, we also have simulated the salt dome using the nonlinear inverse
modeling. The results are mostly similar. 

Keywords

Gravity, Inversion, Salt dome, Underdetermined

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