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Widespread impact-generated porosity in early planetary crusts.

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Title: Widespread impact-generated porosity in early planetary crusts.
Authors: Wiggins, SE
Johnson, BC
Collins, GS
Jay Melosh, H
Marchi, S
Item Type: Journal Article
Abstract: NASA's Gravity Recovery and Interior Laboratory (GRAIL) spacecraft revealed the crust of the Moon is highly porous, with ~4% porosity at 20 km deep. The deep lying porosity discovered by GRAIL has been difficult to explain, with most current models only able to explain high porosity near the lunar surface (first few kilometers) or inside complex craters. Using hydrocode routines we simulated fracturing and generation of porosity by large impacts in lunar, martian, and Earth crust. Our simulations indicate impacts that produce 100-1000 km scale basins alone are capable of producing all observed porosity within the lunar crust. Simulations under the higher surface gravity of Mars and Earth suggest basin forming impacts can be a primary source of porosity and fracturing of ancient planetary crusts. Thus, we show that impacts could have supported widespread crustal fluid circulation, with important implications for subsurface habitable environments on early Earth and Mars.
Issue Date: 16-Aug-2022
Date of Acceptance: 29-Jul-2022
URI: http://hdl.handle.net/10044/1/99203
DOI: 10.1038/s41467-022-32445-3
ISSN: 2041-1723
Publisher: Nature Research
Start Page: 1
End Page: 6
Journal / Book Title: Nature Communications
Volume: 13
Issue: 1
Copyright Statement: © The Author(s) 2022. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Sponsor/Funder: Science and Technology Facilities Council (STFC)
Funder's Grant Number: ST/S000615/1
Keywords: Earth, Planet
Extraterrestrial Environment
Extraterrestrial Environment
Earth, Planet
Earth, Planet
Extraterrestrial Environment
Publication Status: Published
Conference Place: England
Open Access location: https://doi.org/10.1038/s41467-022-32445-3
Online Publication Date: 2022-08-16
Appears in Collections:Earth Science and Engineering

This item is licensed under a Creative Commons License Creative Commons