Formation of the Orientale lunar multiring basin

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Title: Formation of the Orientale lunar multiring basin
Authors: Johnson, BC
Blair, DM
Collins, GS
Item Type: Journal Article
Abstract: 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.
Issue Date: 28-Oct-2016
Date of Acceptance: 8-Sep-2016
ISSN: 0036-8075
Publisher: American Association for the Advancement of Science
Start Page: 441
End Page: 444
Journal / Book Title: Science
Volume: 354
Issue: 6311
Copyright Statement: © 2016, American Association for the Advancement of Science
Sponsor/Funder: Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Funder's Grant Number: ST/J001260/1
Keywords: General Science & Technology
MD Multidisciplinary
Appears in Collections:Faculty of Engineering
Earth Science and Engineering

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