The relationship between bathymetry and gravity in the Atlantic Ocean
1976; American Geophysical Union; Volume: 81; Issue: 11 Linguagem: Inglês
10.1029/jb081i011p01903
ISSN2156-2202
Autores Tópico(s)Geomagnetism and Paleomagnetism Studies
ResumoJournal of Geophysical Research (1896-1977)Volume 81, Issue 11 p. 1903-1915 Geodesy and Gravity The relationship between bathymetry and gravity in the Atlantic Ocean Dan McKenzie, Dan McKenzieSearch for more papers by this authorCarl Bowin, Carl BowinSearch for more papers by this author Dan McKenzie, Dan McKenzieSearch for more papers by this authorCarl Bowin, Carl BowinSearch for more papers by this author First published: 10 April 1976 https://doi.org/10.1029/JB081i011p01903Citations: 310AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract The free air gravity anomaly and depth are sampled at 2-km intervals along two long, reasonably straight ship tracks across the Atlantic Ocean. The resulting series are then processed as if they were time series, and filters are obtained to predict the gravity observations from the bathymetry. More than half the energy in the gravity field can be predicted by this means, and that which cannot emphasizes unusual structures beneath the sea floor. More information can be obtained by comparing the gravity and the bathymetry after both series have been Fourier-transformed. Isostatic compensation begins when the wavelength exceeds about 100 km and increases with increasing wavelength. The results are compared with predictions from various simple models and agree best with a model in which the topography results from variations of crustal thickness and the plate thickness is little greater than 10 km when the compensation occurs. These observations can be understood if the topography results from large-scale intrusions into the lower crust within tens of kilometers of the spreading center. Though such a model for a slowly spreading ridge differs from most of those which have been previously put forward and must be regarded with skepticism until it is supported by evidence from other sources, it appears to be compatible with the limited information now available. Citing Literature Volume81, Issue11Solid Earth and Planets10 April 1976Pages 1903-1915 RelatedInformation
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