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Main Title: Lateral variations in bulk density and porosit of the upper lunar crust from high-resolution gravity and topography data: Comparison of different analysis techniques
Author(s): Wahl, Daniel
Oberst, Jürgen
Type: Article
Abstract: We map lateral variations in bulk density of the upper lunar highland crust using the most recent GRAIL gravity field solution of degree and order 1500 in combination with LOLA topography data, both truncated to an upper limit of degree and order 700. Our maps have a 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 Bouguer anomalies, the second maximizes the smoothness of the Bouguer anomalies. Both approaches suffer in the case that terrain is flat and lacks topographic features; consequently, this is where results from the two methods differ. We also mapped porosity of the crust using grain densities derived from Lunar Prospector spectrometry and sample analysis. It appears that variations in bulk density are mostly related to differences in crustal porosity. We find that high porosity is often associated with areas of impact basins. This confirms earlier studies, that impacts changed the geophysical characteristics of the lithosphere sustainably and that the high porosity of the upper lunar crust is most likely impact induced.
Subject(s): gravity field
Bouguer anomalies
correlation analysis
Issue Date: 29-May-2019
Date Available: 7-Apr-2021
Is Part Of: 10.14279/depositonce-11426
Language Code: en
DDC Class: 550 Geowissenschaften
Sponsor/Funder: DFG, 437101389, Multikollektor-ICP-Massenspektrometer
Journal Title: ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Publisher: Copernicus
Volume: IV-2/W5
Publisher DOI: 10.5194/isprs-annals-IV-2-W5-527-2019
Page Start: 527
Page End: 532
EISSN: 2194-9050
ISSN: 2194-9042
TU Affiliation(s): Fak. 6 Planen Bauen Umwelt » Inst. Geodäsie und Geoinformationstechnik » FG Planetengeodäsie
Appears in Collections:Technische Universität Berlin » Publications

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