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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
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A geophysicist may improve his interpretation of EM (electromagnetic field) data by following four steps. (1) Noise and near-surface contributions are identified and subtracted from data by a high-speed digital computer. (2) A three-dimensional sketch of an ore deposit is interpreted by the geophysicist from characteristic data variations. (3) The data are then compared with fields previously calculated by a computer for model conductors. (4) The closest model is modified to fit the sketch and is further modified by a computer to duplicate the data most closely, thereby giving a detailed three-dimensional picture of the ore deposit.
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