Gravity anomalies and segmentation of the continental margin offshore West Africa

1998 ◽  
Vol 156 (3-4) ◽  
pp. 239-252 ◽  
Author(s):  
A.B. Watts ◽  
J. Stewart
Keyword(s):  
West Africa ◽  
Continental Margin ◽  
Gravity Anomalies

Gravity and Deep Structure of the Continental Margin of Banks Island and Mackenzie Delta

1975 ◽  
Vol 12 (3) ◽  
pp. 378-394 ◽  
Author(s):  
L. W. Sobczak
Keyword(s):  
Continental Margin ◽  
Coastal Plain ◽  
Deep Structure ◽  
Gravity Anomalies ◽  
Sedimentary Basins ◽  
Drill Hole ◽  
The Arctic ◽  
Mackenzie Delta ◽  
Arctic Coastal Plain ◽  
Free Air Gravity

Regional and deep structure supported by drill hole, gravity, and seismic evidence is interpreted along five profiles—one across the Mackenzie Delta and four across the continental margin. Isostatic compensation has reduced the gravity effect of most structures but gravity anomalies are still sufficient to outline two major sedimentary basins—one very extensive and thick (>10 km) underlying the continental margin and Mackenzie Delta and the other narrow and shallow east and southeast of the Arctic Coastal Plain. A basement ridge separating these basins along the eastern side of the Arctic Coastal Plain is outlined by a trend of relative gravity highs.An arcuate belt of prominent elliptically-shaped free air gravity highs (peak values >100 mgal) over the continental break outlines an uncompensated region of mass excesses. These mass excesses are explained by pro-grading wedges (>2 km thick) of Quaternary and possibly Tertiary sediments that have displaced seawater and act as a load on the crust rather than by the alternative concepts of an uncompensated ridge or high density material in the basement.

scholarly journals Continental margin subsidence from shallow mantle convection: Example from West Africa

2018 ◽  
Vol 481 ◽  
pp. 350-361 ◽  
Author(s):  
Bhavik Harish Lodhia ◽  
Gareth G. Roberts ◽  
Alastair J. Fraser ◽  
Stewart Fishwick ◽  
Saskia Goes ◽  
...  
Keyword(s):  
West Africa ◽  
Continental Margin ◽  
Mantle Convection

Gravity anomalies and crustal structure of the western continental margin off Goa and Mulki, India

1991 ◽  
Vol 99 (1-2) ◽  
pp. 247-256 ◽  
Author(s):  
V. Subrahmanyam ◽  
D.Gopala Rao ◽  
T. Ramprasad ◽  
K.A.Kamesh Raju ◽  
M.Gangadhara Rao
Keyword(s):  
Continental Margin ◽  
Crustal Structure ◽  
Gravity Anomalies

Structure of continental margin off Sierra Leone, West Africa

1969 ◽  
Vol 74 (10) ◽  
pp. 2512-2530 ◽  
Author(s):  
R. E. Sheridan ◽  
R. E. Houtz ◽  
C. L. Drake ◽  
M. Ewing
Keyword(s):  
West Africa ◽  
Sierra Leone ◽  
Continental Margin
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