Correlation of Sedimentary Basins Across the North Atlantic as Obtained from Gravity and Magnetic Data, and Its Relation to the Early Evolution of the North Atlantic
Published:January 01, 1989
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J. Verhoef, S.P. Srivastava, 1989. "Correlation of Sedimentary Basins Across the North Atlantic as Obtained from Gravity and Magnetic Data, and Its Relation to the Early Evolution of the North Atlantic", Extensional Tectonics and Stratigraphy of the North Atlantic Margins, A. J. Tankard, H. R. Balkwill
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The relationship between the sedimentary basins and the tectonic fabrics that underlie the continen-tal shelves of the British Isles and Newfoundland are examined using a new predrift reconstruction of the North Atlantic. Digital geophysical data sets are used to create bathymetric, magnetic anomaly, and Bouguer anomaly reconstructions for closure and two postrift periods. These reconstructions provide the framework in which the signatures of the potential field data over these sedimentary basins can be compared. Horizontal derivatives of the magnetic and Bouguer anomalies are used to delineate the outlines of the basins. These outlines show remarkable correlation with those mapped from the seismic data. The derivative maps show the pres-ence of several trends which cut across the basins on the southern Grand Banks and the Porcupine Bank and are parallel to each other. In contrast, the group of trends observed in Orphan basin bear little relationship to those seen on the Eurasian side. The orientation of the trends on the southern Grand Banks seems to match the initial direction of plate motion between North America and Iberia, whereas the trends in the Orphan basin match the initial direction of motion between North America and Eurasia. These correlations suggest a linkage between the tectonic episodes that led to the formation of these basins and the intervening oceanic crust.
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Extensional Tectonics and Stratigraphy of the North Atlantic Margins
Stimulated by the wealth of frontier exploration data and deep seismic surveys about the North Atlantic margins, this publication was crafted to provide a comprehensive analysis of North Atlantic extension. The 40 papers in this volume are divided into 6 sections: concepts, North Atlantic perspectives, North American margins, European-African margins, North Sea and Barents Shelf, and analogs. This book is concerned primarily with the circum-North Atlantic data base. It is largely biased toward presentation and interpretation of data rather than being model driven. The book includes comparative stratigraphic columns for basins of the North Atlantic margins.