Estimation of the temperature in the Earth’s interior from surface measurements of the electromagnetic field |
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| Authors: | V V Spichak O K Zakharova |
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| Institution: | (1) Geoelectromagnetic Research Center, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Troitsk, Moscow oblast, 142190, Russia |
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| Abstract: | The possibility of contactless remote estimation of the temperature in the Earth’s interior from surface magnetotelluric (MT) measurements is examined. The neuronet analysis of MT and temperature measurements in the Bishkek geodynamic research area (the Northern Tien Shan) showed that a contactless electromagnetic geothermometer can in principle be realized. An optimal method including MT measurements and treatment of available thermograms is developed. The method minimizes uncertainties of the remote temperature estimation. The use of six to eight thermograms for calibration of electromagnetic data is shown to provide a 12% relative error of prediction, and a priori geological information available for the region under study can reduce this error. Areas of practical application of a contactless electromagnetic geothermometer are outlined. |
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