Characteristics of large terrestrial impact structures as revealed by remote sensing studies.

Details Characteristics of large terrestrial impact structures as revealed by remote sensing studies. Characteristics of large terrestrial impact structures as revealed by remote sensing studies.

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992tectp.216...45g&link_type=abstract

Tectonophysics, Vol. 216, No. 1/2, p. 45 - 62

Physics

8

Scientific paper

Remote sensing data sets of a spectrum of impact structures on Earth have been analyzed in an effort to determine if such structures have identifiable signatures which could be used as an aid in searching broad areas for the "missing craters" predicted by current estimates of the cratering flux. Meteor Crater, Arizona has been used as a "control" site, due to the extensive data available for this feature. SPOT multi-spectral imagery of Bosumtwi, Ghana, illustrates the difficulties associated with remote sensing in highly vegetated terrains. Nevertheless, the imagery reveals the subtle expression of an outer tectonic ring at the crater, and may be sensitive to geobotanical variations associated with impact-related suevite deposits. By examining a pristine 144 km diameter multi-ring impact feature on the Venus rolling plains, an impression of the original morphology of a continental impact crater of the magnitude of the Cretaceous-Tertiary (K/T) boundary impact structure can be deduced. It is apparent that remote sensing is not a panacea for the discovery and validation of new impact craters, but it can contribute by serving as a pathfinder both for the identification of promising structures and the possible locations of key deposits for detailed fieldwork and sampling.

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