Accession Number : AD0692099

Title :   GEOPHYSICAL INVESTIGATIONS OF THE STRUCTURE OF THE EARTH'S CRUST IN THE ATLANTIC OCEAN REGION,

Corporate Author : AERONAUTICAL CHART AND INFORMATION CENTER ST LOUIS MO LINGUISTIC SECTION

Personal Author(s) : Gainanov,A. G. ; Koryakin,E. D.

Report Date : AUG 1969

Pagination or Media Count : 10

Abstract : The paper discusses the gravity field of the northern part of the Atlantic Ocean. The character of gravity anomalies divides the area into three basis groups - areas of deep oceanic troughs, areas of underwater ridges and oceanic islands and the transition zone from the ocean to the continents. When passing from the Atlantic Ocean to the continents of North and South America, Europe and Africa the values of the free-air anomalies decrease from -50--100 mgal and then increase to +50--70mgal. The Bouguer isoanomaly lines are denser in the transition zone and a considerable gravity gradient is created. Since there are more than 200 seismic points in the Atlantic Ocean where the depth of the M discontinuity has been determined, gravimetric data has also become more abundent. Investigations to determine relation between Bouguer gravity anomalies and the thickness of the earth's crust can now be made separately for the deep parts of the ocean, and for the transition zones from the ocean to the continents. (Author)

Descriptors :   (*STRUCTURAL GEOLOGY, ATLANTIC OCEAN), MAGNETIC ANOMALY DETECTION, MARINE GEOPHYSICS, MOHOROVICIC DISCONTINUITY, THICKNESS, USSR

Subject Categories : Geomagnetism
      Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE