An ocean modeling study of the Cenomanian Atlantic: equatorial paleo-upwelling, organic-rich sediments and the consequences for a connection between the proto-North and South Atlantic

Details An ocean modeling study of the Cenomanian Atlantic: equatorial paleo-upwelling, organic-rich sediments and the consequences for a connection between the proto-North and South Atlantic An ocean modeling study of the Cenomanian Atlantic: equatorial paleo-upwelling, organic-rich sediments and the consequences for a connection between the proto-North and South Atlantic

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..223h&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 2, p. 223-226

Physics

8

Oceanography: Physical, Oceanography: General: Paleoceanography, Oceanography: Physical: Instruments And Techniques

Scientific paper

A reduced-gravity ocean model is used to determine the pattern of upwelling in the Cenomanian Atlantic. The deposition of organic-rich sediments on the margins of the equatorial region is found to be consistent with the patterns of upwelling in simulations which incorporate only a shallow (<=300m) equatorial connection between the North and South Atlantic. Fracture zone ridges were probably responsible for the effective shallowness of the gateway. If a deep equatorial channel is assumed the modeling results are consistent only with the more recent, Turonian, sedimentary record. We suggest, therefore, that reduced-gravity models provide a mean of predicting areas of the continental margins which may be underlain by hydrocarbon-rich sedimentary rocks.

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