Accession Number : AD0649357

Title :   USE OF THE SECOND VERTICAL DERIVATIVES OF THE GRAVITY POTENTIAL FOR THE GEOLOGICAL INTERPRETATION OF THE GRAVIMETRIC,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Veselov,K. E.

Report Date : SEP 1959

Pagination or Media Count : 18

Abstract : The calculation of anomalies of the second vertical derivatives of the gravity potential on the basis of gravity anomaly values on a plane surface is a fairly cumbersome process. It sometimes proves to be even more laborious than the method of local anomaly isolation by means of the averaging of gravimetric charts with the aid of a graticule. (1) On charts of differential g/differential Z isanomalous lines, the anomalies, which are hardly noticeable on gravity isanomaly charts, become distinctly visible. It could be said that a differential g/differential Z chart 'develops' a delta g map while requiring no complementary hypotheses. (2) In contrast to the other methods for the isolation of local anomalies, in calculating differential g/differential Z we obtain entirely realistic physical quantities which may be used for quantitative computations. (3) In contrast to delta g anomalies, which constitute relative quantities, the quantity differential g/differential Z has an absolute value. The differential g/differential Z anomalies manifest themselves with greater sharpness and precision over the shallow-lying anomalous masses than the delta g anomalies. Consequently, they may be used with great success for the calculation of the depth at which the anomalous masses are buried under the assumption that the latter have, for example, a spherical shape. (Author)

Descriptors :   (*GRAVITY, ANOMALIES), USSR, GEOPHYSICAL PROSPECTING, GEOPHYSICS, POTENTIAL THEORY, DIFFERENTIAL EQUATIONS

Subject Categories : Geomagnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE