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TOPOGRAPHIC AND ISOSTATIC CORRECTIONS TO GRAVITY SURVEYS IN MOUNTAINOUS AREAS *
Author(s) -
JOHN V. P. st,
GREEN RONALD
Publication year - 1967
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1967.tb01778.x
Subject(s) - bouguer anomaly , geology , gravity anomaly , terrain , geodesy , isostasy , gravimetry , regional geology , slab , anomaly (physics) , sea level , submarine pipeline , post glacial rebound , free air gravity anomaly , gravimeter , gravitation , tectonics , geophysics , seismology , oceanography , telmatology , paleontology , lithosphere , geotechnical engineering , geography , cartography , oil field , condensed matter physics , casing , reservoir modeling , physics , classical mechanics
In mountainous areas it is an inadequate procedure to reduce gravity observations by merely subtracting the effect of an infinite flat slab of material between the station and sea‐level, and adding a terrain correction. A programme is described which directly computes the effect of masses above sea‐level, and mass‐deficiencies below it; as well as the effect of compensating masses under the Pratt and Airy isostatic systems. As an example, the method has been applied to a regional gravity survey of Papua and New Guinea where it is seen to remove the usually high correlation of the Bouguer anomaly with local topography.