1887

Abstract

An inversion technique using a fast least-squares method is developed to estimate, successively, the shape factor (q-parameter), the depth (z-parameter) and the amplitude coefficient (A-parameter) of a buried structure using normalized residual anomalies obtained from gravity data. By defining the anomaly value at the origin and the anomaly value at different points on the profile (N-value), the problem of shape factor estimation is transformed into a problem of finding a solution of a non-linear equation of the form f(q)=0. Knowing the shape factor and applying the least-squares method, the depth is estimated by solving a nonlinear equation of the form ψ(z) = 0. Finally, knowing the shape factor and the depth, the amplitude coefficient is determined in a least-squares way using a simple linear equation. This technique is applicable for a class of geometrically simple anomalous bodies, including the semi-infinite vertical cylinder, the infinitely long horizontal cylinder, and the sphere. The technique is tested and verified on a theoretical model with and without random errors. It is also successfully applied to real data from mineral exploration in India, and the interpreted shape and depth parameters are in good agreement with the known actual values.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.20143363
2012-09-03
2024-03-29
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20143363
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error