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Lateral Variations in Bulk Density and Porosity of the Upper Lunar Crust from High-Resolution Gravity and Topography Data: Comparison of Different Analysis Techniques

Wahl, D. and Oberst, Jürgen (2019) Lateral Variations in Bulk Density and Porosity of the Upper Lunar Crust from High-Resolution Gravity and Topography Data: Comparison of Different Analysis Techniques. In: ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, IV-2 (W5), pp. 527-532. ISPRS Geospatial Week 2019, 10. -14. Juni 2019, Enschede, The Netherlands. DOI: 10.5194/isprs-annals-IV-2-W5-527-2019 ISSN 2194-9042

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Official URL: https://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/IV-2-W5/527/2019/

Abstract

We map lateral variations in bulk density of the upper lunar highland crust using the most recent GRAIL gravity field solution of degreeand order 1500 in combination with LOLA topography data, both truncated to an upper limit of degree and order 700. Our maps havea spatial resolution of 0.75°, where each grid point was calculated using circular analysis regions of 3° radius. We apply two methods,which yield similar results for most parts of the study area. The first method minimizes the correlation between topography and Bougueranomalies, the second maximizes the smoothness of the Bouguer anomalies. Both approaches suffer in the case that terrain is flat andlacks topographic features; consequently, this is where results from the two methods differ. We also mapped porosity of the crust usinggrain densities derived from Lunar Prospector spectrometry and sample analysis. It appears that variations in bulk density are mostlyrelated to differences in crustal porosity. We find that high porosity is often associated with areas of impact basins. This confirms earlierstudies, that impacts changed the geophysical characteristics of the lithosphere sustainably and that the high porosity of the upper lunarcrust is most likely impact induced.

Item URL in elib:https://elib.dlr.de/132104/
Document Type:Conference or Workshop Item (Speech)
Title:Lateral Variations in Bulk Density and Porosity of the Upper Lunar Crust from High-Resolution Gravity and Topography Data: Comparison of Different Analysis Techniques
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wahl, D.Technische Universität Berlin, Chair of Planetary Geodesy, 10623 Berlin, GermanyUNSPECIFIED
Oberst, Jürgenjuergen.oberst (at) dlr.de ; Technical University of Berlin, GermanyUNSPECIFIED
Date:May 2019
Journal or Publication Title:ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:IV-2
DOI :10.5194/isprs-annals-IV-2-W5-527-2019
Page Range:pp. 527-532
ISSN:2194-9042
Status:Published
Keywords:Gravity Field, Bouguer Anomalies, Correlation Analysis, GRAIL, LOLA
Event Title:ISPRS Geospatial Week 2019
Event Location:Enschede, The Netherlands
Event Type:international Conference
Event Dates:10. -14. Juni 2019
Organizer:ISPRS
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:09 Dec 2019 08:57
Last Modified:09 Dec 2019 08:57

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