Distribution of the Earth's Magnetic Field in Akita Prefecture (2nd Report) - Report of the Detailed Obserbation over the Asahigawa Oil-Field.
Yumura, T.
Abstract
This report gives the results of detailed geomagnetic survey over the Asahigawa Oil-Field in Akita Prefecture, which carried out consecutively after the survey all over Akita Prefecture, and also the structure of basement rocks supposed from the magnetic distribution - anticlinal and synclinal axis or faulting. From these supposed structures, some expected locations of oil reservoir are shown.
The results are as follows :
(i) The distribution of disturbed magnetic field of vertical component is decreasing gradually at west or south than east or north though it is positive in all.
(ii) All observed region is divided into four parts from the view of magnetic distribution; northern, eastern, southern and central part. The anomalies over the northern and eastern part of this region are disturbed larger than the other parts.
(iii) ln this region, five anticlinal and four synclinal axes are supposed from the magnetic data. Furthermore it is supposed that these axes are cloven in two or three by the two faultings deduced from the magnetic data and that the order of the horizontal differences are all the same.
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