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Updated: Sep 4, 2025
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Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
Published on: July 30, 2020
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Lunar Megaregolith Structure Revealed by GRAIL Gravity Data
Kristel Izquierdo1, Michael M Sori1, Jason M Soderblom2
1Department of Earth, Atmospheric, and Planetary Sciences Purdue University West Lafayette IN USA.
Geophysical Research Letters
|July 22, 2022
Summary
NASA
Area of Science:
- Lunar geology
- Planetary science
- Geophysics
Background:
- The upper lunar crust's porosity influences its physical properties.
- Understanding porosity is key to lunar evolution models.
Purpose of the Study:
- To characterize the porosity structure of the lunar crust.
- To investigate the relationship between crater size and porosity.
Main Methods:
- Analysis of gravity data from NASA's GRAIL mission.
- Examination of gravitational anomalies linked to crater porosity (10-30 km diameter).
Main Results:
- A significant change in crater gravitational signatures was observed at a specific diameter.
- This change correlates with a discrete porosity shift at ~3-5 km depth.
- Identified boundary between basin ejecta and the structurally disturbed crust.
Conclusions:
- The porosity boundary marks the base of the ejecta layer.
- Ejecta thickness provides constraints for lunar material transport and heat flow models.
- The ejecta layer's insulating properties impact models of lunar magmatism.
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