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Magnetic Basement: Gravity-Guided Magnetic Source Depth Analysis and Interpretation
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, EGM 2007 International Workshop, Apr 2007, cp-166-00061
Abstract
We present an integrated approach to the interpretation of magnetic basement that is based on recognition of characteristic patterns in distribution of magnetic source depth solutions and Bouguer gravity data. Magnetic/crystalline basement and sedimentary cover have very different lithologies and different characteristics of their magnetizations. These differences result in distinctly different distributions and alignments of magnetic source depth solutions above and below magnetic basement. An empirical set of criteria (“basement indicators”) was developed for identification and correlation of the basement surface. The ambiguity of basement correlation with limited or no well control can be reduced by incorporating the Bouguer gravity data into the process of correlation.