Imperial College London

Dr Gareth Collins

Faculty of EngineeringDepartment of Earth Science & Engineering

Reader in 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{Potter:2015:10.1130/2015.25186,
author = {Potter, RWK and Kring, DA and Collins, GS},
doi = {10.1130/2015.25186},
journal = {Special Paper of the Geological Society of America},
pages = {99--113},
title = {Scaling of basin-sized impacts and the influence of target temperature},
url = {http://dx.doi.org/10.1130/2015.25186},
volume = {518},
year = {2015}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - © 2015 The Geological Society of America. All rights reserved. We produce a set of scaling laws for basin-sized impacts using data from a suite of lunar basin numerical models. The results demonstrate the importance of preimpact target temperature and thermal gradient, which are shown to greatly influence the modification phase of the impact cratering process. Impacts into targets with contrasting thermal properties also produce very different crustal and topographic profiles for impacts of the same energy. Thermal conditions do not, however, significantly influence the excavation stage of the cratering process; results demonstrate, as a consequence of gravity-dominated growth, that transient crater radii are generally within 5% of each other over a wide range of thermal gradients. Excavation depth-to-diameter ratios for the basin models (~0.12) agree well with experimental, geological, and geophysical estimates, suggesting basins follow proportional scaling. This is further demonstrated by an agreement between the basin models and Piscaling laws based upon first principles and experimental data. The results of this work should also be applicable to basin-scale impacts on other silicate bodies, including the Hadean Earth.
AU - Potter,RWK
AU - Kring,DA
AU - Collins,GS
DO - 10.1130/2015.25186
EP - 113
PY - 2015///
SN - 0072-1077
SP - 99
TI - Scaling of basin-sized impacts and the influence of target temperature
T2 - Special Paper of the Geological Society of America
UR - http://dx.doi.org/10.1130/2015.25186
VL - 518
ER -