Preprints
https://doi.org/10.5194/egusphere-2024-866
https://doi.org/10.5194/egusphere-2024-866
26 Apr 2024
 | 26 Apr 2024
Status: this preprint is open for discussion.

Popigai and Chicxulub craters: multiple impacts and their associated grabens

Jaroslav Klokocnik, Vaclav Cilek, Jan Kostelecky, and Ales Bezdek

Abstract. More advanced data (gravity field model EIGEN 6C4 with GOCE gradiometry data instead of EGM2008) and more sophisticated method (using a set of the gravity aspects instead of the gravity anomalies and the radial second derivative of the disturbing potential only) enable a deeper study of various geological features, here the impact craters Chicxulub and Popigai. We confirm our results from 2010, extend them, and offer more complicated models, namely by means of the gravity strike angles. Both craters are double or multiple craters. The probable impactor direction is from NE for Chicxulub and SE-NW for Popigai. The both crater formations seem to be associated with impact induced tectonics that triggered development of impact grabens.

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Jaroslav Klokocnik, Vaclav Cilek, Jan Kostelecky, and Ales Bezdek

Status: open (until 21 Jun 2024)

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Jaroslav Klokocnik, Vaclav Cilek, Jan Kostelecky, and Ales Bezdek
Jaroslav Klokocnik, Vaclav Cilek, Jan Kostelecky, and Ales Bezdek

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Short summary
Gravity aspects applied to the well-known impact craters Popigai and Chicxulub. Findings about them from 2010 confirmed and extended with better data and more advanced method. Both craters are double or multiple craters. Both crater formations seem to be associated with impact induced tectonics that triggered development of impact grabens.