Accession Number : AD0730353

Title :   Experimental Isostasy. Part II. An Isostatic Model for the U.S.A. Derived from Gravity and Topographic Data,

Corporate Author : WISCONSIN UNIV MADISON

Personal Author(s) : Lewis,Brian T. R. ; Dorman,LeRoy M.

Report Date : SEP 1971

Pagination or Media Count : 47

Abstract : Clark and Ringwood (1964) in discussing the petrological-physical properties of the upper mantle concluded that isostatic compensation was not complete until 400 km. These new facts require a re-evaluation of the gravity data from an isostatic standpoint. Dorman and Lewis (Paper I), using a communication theory approach, have discussed the theory for obtaining the earth's response to a unit load, and hence under certain assumptions, the isostatic mechanism, from the data itself. It is the purpose of this paper to apply this method to data in the U.S.A., using numerical analysis techniques which appear heretofore to have bypassed the subject of isostasy, in an attempt to further refine our knowledge of the isostatic processes. In addition the general application of these techniques to the analysis of two dimensional gravity fields and the specific application to the problem of gravity prediction will be discussed. (Author)

Descriptors :   (*ISOSTATIC CHANGE, MATHEMATICAL MODELS), GRAVITY, ANOMALIES, INTEGRAL TRANSFORMS, CORRECTIONS, MAPPING, UNITED STATES

Subject Categories : Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE