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| | Abstract | | The integrated analysis on the basis of Poisson's theorem relating to the relation between gravitational and geo-magnetic potentials is applied to the gravity gradient and magnetic datasets acquired at low flight height and with dense measurement density in the geothermal prospective area in the south-eastern part of Akita prefecture, Japan. The correlations between the two data sets are extremely well. The results of analysis shows satisfactorily the variations of near-surface density and magnetization contrasts. This helps to assess the delineations of volcanic activities and intrusive rocks, and consequently to evaluate the distributions of heat sources and geothermal reservoirs as well. This may also help to interpret the possible distributions of smaller hidden subsurface volcanic and intrusive rocks, and near-surface lava distributions. |
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