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Formation of the Orientale lunar multiring basin

by Freed, Andrew M. , Blair, David M. , Andrews-Hanna, Jeffrey C. , Keane, James T. , Soderblom, Jason M. , Taylor, G. Jeffrey , Miljković, Katarina , Wieczorek, Mark A. , Nimmo, Francis , Melosh, H. Jay , Johnson, Brandon C. , Collins, Gareth S. , Head, James W. , Zuber, Maria T.

in Astronomy / Basins / Computer Simulation / Earth Sciences / Formations / Gravitation / Gravitational collapse / Gravity / Impactors / Lunar craters / Lunar Research / Moon / Planetology / Sciences of the Universe / Simulation / Space exploration / Spacecraft / Stratigraphy

2016

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Formation of the Orientale lunar multiring basin

2016

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Formation of the Orientale lunar multiring basin

2016

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Journal Article

Formation of the Orientale lunar multiring basin

Freed, Andrew M.,

Blair, David M.,

Andrews-Hanna, Jeffrey C.,

Keane, James T.,

Soderblom, Jason M.,

Taylor, G. Jeffrey,

Miljković, Katarina,

Wieczorek, Mark A.,

Nimmo, Francis,

Melosh, H. Jay,

Johnson, Brandon C.,

Collins, Gareth S.,

Head, James W.,

Zuber, Maria T.

2016

Overview

Multiring basins, large impact craters characterized by multiple concentric topographic rings, dominate the stratigraphy, tectonics, and crustal structure of the Moon. Using a hydrocode, we simulated the formation of the Orientale multiring basin, producing a subsurface structure consistent with high-resolution gravity data from the Gravity Recovery and Interior Laboratory (GRAIL) spacecraft. The simulated impact produced a transient crater, ~390 kilometers in diameter, that was not maintained because of subsequent gravitational collapse. Our simulations indicate that the flow of warm weak material at depth was crucial to the formation of the basin's outer rings, which are large normal faults that formed at different times during the collapse stage. The key parameters controlling ring location and spacing are impactor diameter and lunar thermal gradients.

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Publisher

American Association for the Advancement of Science,The American Association for the Advancement of Science,American Association for the Advancement of Science (AAAS)

Subject

Astronomy

/ Basins

/ Computer Simulation

/ Earth Sciences

/ Formations

/ Gravitation

/ Gravitational collapse

/ Gravity

/ Impactors

/ Lunar craters

/ Lunar Research