. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography Dash et al.: Geophysical Investigation of the Cape Verde Archipelago 5257. 18 w TERRAIN-CORRECTED BOUCUER ANOMALY CAPE VERDE ISLANDS CONTOUR INTERVAL 10 MGAL 26 25 24 23 22 Fig. 9. Terrain-corrected Bouguer anomaly map around the Cape Verde archipelago with a contour interval of 10 mGal. Tentative correlation of oceanic magnetic anomalies in the Cape Verde area based on our new data and added on to those published by Rona et al. [1970] substantially
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography Dash et al.: Geophysical Investigation of the Cape Verde Archipelago 5257. 18 w TERRAIN-CORRECTED BOUCUER ANOMALY CAPE VERDE ISLANDS CONTOUR INTERVAL 10 MGAL 26 25 24 23 22 Fig. 9. Terrain-corrected Bouguer anomaly map around the Cape Verde archipelago with a contour interval of 10 mGal. Tentative correlation of oceanic magnetic anomalies in the Cape Verde area based on our new data and added on to those published by Rona et al. [1970] substantially confirms the general N-S trends established by previous work. There is some indication of minor offsets of anomalies, although no fracture zones can be mapped except the possible eastern extension of the Kane fracture zone at about 21°N latitude. Where deviations from the general N-S anomaly trend occur, the preferred orientation is NNW-SSE, parallel with structural features and morpholo- gical lineations within the island group as well as with the postulated deep fault trends derived from the seismic and gravity data. Conclusions The present crustal structure beneath the Cape Verde archipelago determined by our seismic refraction and gravity measurements is transi- tional in that the Moho lies at a crustal depth between 16 and 17 km, midway between dimensions typical for continental and oceanic crust. It is interesting to compare the crustal structure of the Canary Islands, lying off the coast of Spanish Sahara with that of the Cape Verde archipelago. Dash and Bosshard [1969] postulated that the five western islands of the Canaries group are not related structurally to the African continent. The crust is of oceanic thickness on the west. In the central part of the island group the thickness of the crust is transitional. The depth to Moho varies from 12 to 14 km. Roeser et al. [1971], from their refraction seismic and gravity studies of the area between Africa and Gran Canari
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