Imperial College London
Portrait Picture

Professor Gareth Collins

Faculty of Engineering, Department of Earth Science & Engineering

Professor of Planetary Science
 
 
 
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Contact

 

+44 (0)20 7594 1518g.collins Website

 
 
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Location

 

4.83Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Riller:2018:10.1038/s41586-018-0607-z,
author = {Riller, U and Poelchau, MH and Rae, A and Schulte, FM and Collins, GS and Melosh, HJ and Grieve, RAF and Morgan, JV and Gulick, SPS and Lofi, J and Diaw, A and McCall, N and Kring, DA},
doi = {10.1038/s41586-018-0607-z},
journal = {Nature},
pages = {511--518},
title = {Rock fluidization during peak-ring formation of large impact structures},
url = {http://dx.doi.org/10.1038/s41586-018-0607-z},
volume = {562},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Large meteorite impact structures on the terrestrial bodies of the Solar System contain pronounced topographic rings, which emerged from uplifted target (crustal) rocks within minutes of impact. To flow rapidly over large distances, these target rocks must have weakened drastically, but they subsequently regained sufficient strength to build and sustain topographic rings. The mechanisms of rock deformation that accomplish such extreme change in mechanical behaviour during cratering are largely unknown and have been debated for decades. Recent drilling of the approximately 200-km-diameter Chicxulub impact structure in Mexico has produced a record of brittle and viscous deformation within its peak-ring rocks. Here we show how catastrophic rock weakening upon impact is followed by an increase in rock strength that culminated in the formation of the peak ring during cratering. The observations point to quasi-continuous rock flow and hence acoustic fluidization as the dominant physical process controlling initial cratering, followed by increasingly localized faulting.
AU  - Riller,U
AU  - Poelchau,MH
AU  - Rae,A
AU  - Schulte,FM
AU  - Collins,GS
AU  - Melosh,HJ
AU  - Grieve,RAF
AU  - Morgan,JV
AU  - Gulick,SPS
AU  - Lofi,J
AU  - Diaw,A
AU  - McCall,N
AU  - Kring,DA
DO  - 10.1038/s41586-018-0607-z
EP  - 518
PY  - 2018///
SN  - 0028-0836
SP  - 511
TI  - Rock fluidization during peak-ring formation of large impact structures
T2  - Nature
UR  - http://dx.doi.org/10.1038/s41586-018-0607-z
UR  - http://hdl.handle.net/10044/1/63770
VL  - 562
ER  -
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