Chicxulub impact basin: Gravity characteristics and implications for basin morphology and deep structure

Details Chicxulub impact basin: Gravity characteristics and implications for basin morphology and deep structure Chicxulub impact basin: Gravity characteristics and implications for basin morphology and deep structure

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24.1283s&link_type=abstract

In its Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z p 1283-1284 (SEE N94-20636 05-91)

Other

Geomorphology, Gradients, Gravity Anomalies, Meteorite Collisions, Meteorite Craters, Structural Basins, Gravitation, Meteoritic Damage, Topography

Scientific paper

The K-T-aged Chicxulub Impact Structure is buried beneath the Tertiary carbonate rocks of the Northern Yucatan Platform. Consequently its morphology and structure are poorly understood. Reprocessed Bouguer (onshore) and Free Air (offshore) gravity data over Northern Yucatan reveal that Chicxulub may be a 200-km-diameter multi-ring impact basin with at least three concentric basin rings. The positions of these rings follow the square root of 2 spacing rule derived empirically from analysis of multi-ring basins on other planets indicating that these rings probably correspond to now-buried topographic basin rings. A forward model of the gravity data along a radial transect from the southwest margin of the structure indicates that the Chicxulub gravity signature is compatible with this interpretation. We estimate the basin rim diameter to be 204 +/- 16 km and the central peak ring diameter (D) is 104 +/- 6 km.

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