DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Regolith mixing by impacts: Lateral diffusion of basin melt

Liu, Tiantian and Michael, Greg and Engelmann, Juliane and Wünnemann, K. and Oberst, Jürgen (2019) Regolith mixing by impacts: Lateral diffusion of basin melt. Icarus, 321, pp. 691-704. Elsevier. DOI: 10.1016/j.icarus.2018.12.026 ISSN 0019-1035

Full text not available from this repository.

Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0019103518302288


Impact cratering has been the primary process to alter the distribution of lunar highland material since the formation of a crust. This impact history is recorded in the radiogenic clocks of impact melts which are accessible for study on lunar samples and meteorites. However, primary impact melt is exposed to a long-time gardening process (i.e. re-melting, excavation, burial, and re-excavation) by subsequent impacts resulting in a complex spatial distribution of materials representing specific impact events. To investigate the diffusion behavior of impact melt, a model tracing the evolving distribution of melt laterally and with depth was built using a Monte Carlo approach. Given scaling laws concerning melt production and ejecta distribution, the size-frequency distribution of impact craters, and the rate function for crater formation, we examine the evolution of melt component occurrence of different ages. Three mid- to late-forming basins (Serenitatis, Crisium, and Imbrium) are chosen as a case study for the diffusion of melt from major basin-forming events. The survival probability of basin melt occurrence at the Apollo and Luna sampling spots is derived. It is expected to find abundant Imbrium and Crisium melt at the Apollo and Luna sampling sites, consistent with the K-Ar radiometric dates of highland samples; whereas the older Serenitatis melt was subjected to the later long-term gardening, strongly influenced by later local impacts, and thus is less abundant. Understanding the diffusion of impact melt is helpful for interpretation of radiometric ages of lunar samples and can be used to predict the distribution of differently-aged melts at future landing/sampling sites such as the Chinese Chang'E-4 (CE-4).

Item URL in elib:https://elib.dlr.de/131964/
Document Type:Article
Title:Regolith mixing by impacts: Lateral diffusion of basin melt
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Liu, TiantianInstitute of Geodesy and Geoinformation Science, Technische Universität Berlin, Berlin 10623, GermanyUNSPECIFIED
Michael, GregFU BerlinUNSPECIFIED
Engelmann, JulianeFreie Universität Berlin, Malteserstr., 74-100, Haus D, Berlin 12249, Germany/ Museum für Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, Berlin 10115, GermanyUNSPECIFIED
Wünnemann, K.Museum für Naturkunde Leibniz-Institut für Evolutions- und Biodiversitätsforschung Invalidenstraße 43, 10115 Berlin, DeutschlandUNSPECIFIED
Oberst, Jürgenjuergen.oberst (at) dlr.deUNSPECIFIED
Date:15 March 2019
Journal or Publication Title:Icarus
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.icarus.2018.12.026
Page Range:pp. 691-704
Keywords:Moon, surface, Regoliths, Impact processes, Cratering
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geodesy
Deposited By: Willner, Dr Konrad
Deposited On:04 Dec 2019 13:00
Last Modified:04 Dec 2019 13:00

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.