Crustal structure of the Chicxulub Impact crater imaged with magnetotelluric exploration

Details Crustal structure of the Chicxulub Impact crater imaged with magnetotelluric exploration Crustal structure of the Chicxulub Impact crater imaged with magnetotelluric exploration

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29p..35u&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 16, pp. 35-1, CiteID 1788, DOI 10.1029/2002GL014998

Physics

Geophysics

4

Planetary Sciences: Impact Phenomena (Includes Cratering), Exploration Geophysics: Magnetic And Electrical Methods

Scientific paper

The electrical resistivity structure of the Chicxulub Impact crater has been imaged using broadband magnetotelluric exploration. A 1-2 km thick sequence of conductive Tertiary sedimentary rocks was imaged within the crater. The shallow resistivity of this layer increases across the cenote ring. This is primarily due to a decrease in porosity, although the groundwater composition may have some effect. While this layer reduces the sensitivity of MT, several features can be discerned beneath it. In the center of the crater the structural high is imaged as a region of high resistivity. In the outer part of the crater, lower resistivities in the upper crust may be due to mineralization or hydrothermal alteration.

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