An analysis of factors controlling gravity and its prediction in the Atlantic Ocean
George Prior Woollard, Valerie M. Hanna, Hawaii Institute of Geophysics, Aerospace Center (U.S.), United States. Office of Naval Research
Hawaii Institute of Geophysics, University of Hawaii, 1976 - Science - 105 pages
This report is presented in the format of a logical mode of investigation having general applicability in establishing a gravity prediction process for any oceanic area but applied specifically to the Atlantic Ocean. The presentation takes cognizance of the fact that there are gravity domains in which the basic relationship between gravity anomalies and regional changes in bathymetry varies; that plate tectonics plays a significant role in defining the boundaries of gravity domains; that long wavelength changes and lithospheric mass play a significant role in defining the rate and sign of change in free air anomaly values with change in water depth within a given gravity domain; and that changes in crustal age and crustal thickness and composition give rise to both local and semi-regional perturbations which, for the most part, can not be anticipated except where there is associated bathymetric expression or some geophysical parameter value related to gravity.
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Bouguer Anomaly Relationships
General Recapitulation of Best Mode of Data
Isostatic Anomaly and Crustal Model Relationships
2 other sections not shown
14 mgal 20 mgal 52°N latitude air anomaly values anomaly values corrected appears area West associated Atlantic Ocean averaged free air bathymetric Bouguer anomaly values changes in crustal changes in free changes in water crust crustal age crustal blocks crustal composition crustal density crustal spreading crustal thickness depth of water depth values West East of Ridge East side Farallon Plate fracture zones free air anomaly function gradient gravity anomaly values heat flow increasing water depth isochrons isostatic anomaly values l°xl lithospheric longitude magnetic lineation mass attraction mid-Atlantic Ridge North Atlantic area Ocean offset in values peak plots regional changes relationship ridge axis ridge crest area rise crest scatter in values seismic refraction shown in Figure South spread in values trough values and depth values to depth Walvis Ridge water column water depth values water values West and East West of Mid-Atlantic West side Woollard zero anomaly intercept