Hydrocode Simulations of Chicxulub Crater Collapse and Peak-Ring Formation

Details Hydrocode Simulations of Chicxulub Crater Collapse and Peak-Ring Formation Hydrocode Simulations of Chicxulub Crater Collapse and Peak-Ring Formation

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002icar..157...24c&link_type=abstract

Icarus, Volume 157, Issue 1, pp. 24-33 (2002).

Computer Science

58

Scientific paper

We use hydrocode modeling to investigate dynamic models for the collapse of the Chicxulub impact crater. Our aim is to integrate the results from numerical simulations with kinematic models derived from seismic reflection and wide-angle velocity data to further our understanding of the formation of large impact craters. In our simulations, we model the collapse of a 100-km diameter, bowl-shaped cavity formed in comprehensively fractured crustal material. To facilitate wholesale collapse, we require that the strength of the target be significantly weakened. In the present model, we achieve this using acoustic fluidization, where strong vibrations produced by the expanding shock wave cause extreme pressure fluctuations in the target. At times and positions where the overburden pressure is sufficiently counteracted, the frictional resistance is reduced, enabling the rock debris to flow. Our simulations produce a collapsed crater that contains most of the features that we observe in the seismic data at Chicxulub. In particular, we observe a topographic peak ring, formed as material that is originally part of the central uplift collapses outward and is thrust over the inwardly collapsing transient crater rim. This model for peak-ring generation has not been previously demonstrated by numerical simulations and predicts that the peak ring is composed of deeply derived material and that the stratigraphy within the peak ring is overturned. .

Affiliated with

Also associated with

No associations

Rating

Hydrocode Simulations of Chicxulub Crater Collapse and Peak-Ring Formation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Hydrocode Simulations of Chicxulub Crater Collapse and Peak-Ring Formation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrocode Simulations of Chicxulub Crater Collapse and Peak-Ring Formation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-981047