GRAIL gravity constraints on the vertical and lateral density structure of the lunar crust
In: ISSN: 0094-8276, 2014
Online
academicJournal
Zugriff:
International audience ; We analyzed data from the Gravity Recovery and Interior Laboratory (GRAIL) mission using a localized admittance approach to map out spatial variations in the vertical density structure of the lunar crust. Mare regions are characterized by a distinct decrease in density with depth, while the farside is characterized by an increase in density with depth at an average gradient of ∼35 kg m −3 km −1 and typical surface porosities of at least 20%. The Apollo 12 and 14 landing site region has a similar density structure to the farside, permitting a comparison with seismic velocity profiles. The interior of the South Pole-Aitken (SP-A) impact basin appears distinct with a near-surface low-density (porous) layer 2-3 times thinner than the rest of the farside. This result suggests that redistribution of material during the large SPA impact likely played a major role in sculpting the lunar crust.
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GRAIL gravity constraints on the vertical and lateral density structure of the lunar crust
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Autor/in / Beteiligte Person: | Besserer, Jonathan ; Nimmo, Francis ; Wieczorek, Mark ; Weber, Renee ; Kiefer, Walter ; Mcgovern, Patrick ; Andrews-Hanna, Jeffrey ; Smith, David ; Zuber, Maria ; Department of Earth and Planetary Sciences Santa Cruz ; University of California Santa Cruz (UC Santa Cruz) ; University of California (UC)-University of California (UC) ; Institut de Physique du Globe de Paris (IPGP (UMR_7154)) ; Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) ; NASA Marshall Space Flight Center (MSFC) ; Lunar and Planetary Institute Houston (LPI) ; Department of Earth, Atmospheric and Planetary Sciences MIT, Cambridge (EAPS) ; Massachusetts Institute of Technology (MIT) |
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Zeitschrift: | ISSN: 0094-8276, 2014 |
Veröffentlichung: | HAL CCSD ; American Geophysical Union, 2014 |
Medientyp: | academicJournal |
DOI: | 10.1002/2014GL060240 |
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