f Structural Insights Gained From A Comparison Of Offshore Namibia Satellite Gravity Data With Onshore Magnetic And Gravity Data

Offshore Namibia satellite gravity data are juxtaposed against the aeromagnetic<br>data and Bouguer gravity data of southern Africa in order to elucidate structural<br>and lithological features within the offshore magnetic basement. A large circular<br>gravity high) interpreted to be of similar origin to the Erongoberg, is seen some<br>50km southwest of Walvis Bay. The most striking result of this study is that the<br>interpreted Mesozoic age, narrow, coast-parallel intrusions, associated with<br>extension, have been faulted along the offshore continuations of early Palaeozoic -<br>late Proterozoic structures, suggesting that these structures were active until late<br>Mesozoic times. An important implication is that these structures provided<br>potential pathways for major drainage systems and hence the focus of major<br>offshore sedimentation.