Structure and evolution of the lunar Procellarum region as revealed by GRAIL gravity data

  title={Structure and evolution of the lunar Procellarum region as revealed by GRAIL gravity data},
  author={J. Andrews‐Hanna and J. Besserer and J. Head and C. Howett and W. Kiefer and P. J. Lucey and P. McGovern and H. Melosh and G. Neumann and R. Phillips and P. Schenk and D. E. Smith and S. Solomon and M. Zuber},
The Procellarum region is a broad area on the nearside of the Moon that is characterized by low elevations, thin crust, and high surface concentrations of the heat-producing elements uranium, thorium, and potassium. The region has been interpreted as an ancient impact basin approximately 3,200 kilometres in diameter, although supporting evidence at the surface would have been largely obscured as a result of the great antiquity and poor preservation of any diagnostic features. Here we use data… Expand
Ring faults and ring dikes around the Orientale basin on the Moon.
Gravity data from NASA's Gravity Recovery and Interior Laboratory (GRAIL) mission is used to reveal the subsurface structure of Orientale and its ring system, revealing a continuous ring dike intruded into the Outer Rook along the plane of the fault associated with the ring scarp. Expand
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The formation ages of tectonic structures and their spatial distributions were studied in the northwestern Imbrium and Sinus Iridum regions using images obtained by Terrain Camera and MultibandExpand
Reexamination of Early Lunar Chronology With GRAIL Data: Terranes, Basins, and Impact Fluxes
Flooding of the lunar surface by ancient mare basalts has rendered uncertain the ages of lunar geochemical terranes and several impact basins. Here we combine craters having recognizable surfaceExpand
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Subsurface structures of buried features in the lunar Procellarum region
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Gravity field of the Orientale basin from the Gravity Recovery and Interior Laboratory Mission
The Gravity Recovery and Interior Laboratory (GRAIL) mission used to investigate the gravitational field of Orientale at 3- to 5-kilometer horizontal resolution to reveal structure in the Orientale impact crater. Expand
Origin and implications of non-radial Imbrium Sculpture on the Moon
It is concluded that the Imbrium impactor was a proto-planet (half the diameter of Vesta), once part of a population of large proto-planets in the asteroid belt before depletion caused by the orbital migration of Jupiter and Saturn. Expand


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The Moon's gravity field shows that the lunar crust is less dense and more porous than was thought, and high-resolution gravity data obtained from the dual Gravity Recovery and Interior Laboratory (GRAIL) spacecraft show that the bulk density of the Moon's highlands crust is substantially lower than generally assumed. Expand
Ancient Igneous Intrusions and Early Expansion of the Moon Revealed by GRAIL Gravity Gradiometry
The Moon's gravity map shows that the crust is cut by extensive magmatic dikes, perhaps implying a period of early expansion, and application of gravity gradiometry to observations by the GRAIL mission results in the identification of a population of linear gravity anomalies with lengths of hundreds of kilometers. Expand
The “Procellarum KREEP Terrane”: Implications for mare volcanism and lunar evolution
Geophysical, remote-sensing, and sample data demonstrate that the Procellarum and Imbrium regions of the Moon make up a unique geochemical crustal province (here dubbed the Procellarum KREEPExpand
Geophysical constraints on the lunar Procellarum KREEP Terrane
[1] The Moon's Procellarum KREEP Terrane (PKT) is distinguished by unique geochemistry and extended volcanic history. Previous thermal-conduction models using enhanced radionuclide abundances inExpand
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[1] The Moon possesses a clear dichotomy in geological processes between the nearside and farside hemispheres. The most pronounced expressions of this dichotomy are the strong concentration ofExpand
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It is suggested that the elliptical nature of the crustal dichotomy is most simply explained by a giant impact, representing the largest such structure thus far identified in the Solar System. Expand
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[1] The south polar terrain (SPT) of Saturn’s moon Enceladus is a mysteriously active region that exhibits intriguing tectonic signatures and widespread fracturing. The central region of theExpand
The relationship between crustal tectonics and internal evolution in the moon and Mercury
Abstract Faulting and volcanism on a planetary surface can be closely related to the thermal evolution of the planetary volume. Interior warming leads to global expansion, surface extensionalExpand