3D inversion of resistivity and IP data, two case studies from mineral exploration

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3D inversion of IP data provides a better result than 2D inversion. These case studies demonstrate the improvement in depth of investigation that solving the inversion as a 3D problem provides, and the reduction of artifacts caused by the 3D nature of the sources seen in the deeper parts of the 2D inversion solutions. The use of a visualizer to report results is illustrated. A significant problem for interpreters wanting 3D inversion solutions is the time required to solve the inversion problem on typical desktop computers. To address this, the UBC 3D algorithm has been re-coded to run on a parallelized Linux cluster. Practical solution times have been achieved.

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... These advances have been augmented with the growth in parallel processing possibilities opened up by multicore processors, clustered processors and grid processing. The latter possibilities have become practical as networking speeds have improved (Kowalczyk et al. (2002), Yoshioka and Zhdanov (2005)). Computer software These have been less significant than other factors, but computer languages have evolved in sophistication and have aided in the development of robust efficient solution of forward models and also allowed more rapid deployment on distributed computing environments eg MPI (A Message-Passing Interface Standard, ...
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Inversion of all types of geophysical data has become common place in the past decade. This is a result of suitable software and hardware becoming widely available as well as an industry which has learned the value of undertaking value added processing to obtain the maximum useful geological signal. Future developments will likely see the addition of some for of artificial intelligence to help guide the inversion processes.
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