Physics
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..501h&link_type=abstract
Lunar and Planetary Science, volume 27, page 501
Physics
4
Ejecta, Imbrium, Regolith, Thorium, Van De Graaff
Scientific paper
Could most of the Th-rich material in lunar highland samples be Imbrium ejecta? The farside highlands gamma-ray data show a high Th concentration only near the Imbrium antipode, near Van de Graaff and M. Ingenii. This Th-rich area lies at the edge of the South-Pole-Aitken Basin, far from the KREEPy Procellarum region, and supports a widespread distribution of KREEPy material, which may derive from the residual liquid of the magma-ocean. Here, we investigate an alternative explanation, that the Th at Van de Graaff may be contained within Imbrium ejecta. We previously speculated (orally, LPSC XXVI) that the Imbrium bolide impacted into a Th-rich geochemical province that is a primary feature of lunar differentiation. The province consists of subregions of high Th concentration, an apparent patchwork of KREEPy lava flows, mare basalt flows, and Th-rich highland material with an average surface concentration as high as ~8 ppm.
Benner Lance A. M.
Haskin Larry A.
McKinnon William B.
No associations
LandOfFree
Could Imbrium Ejecta be the Source of the High-Th Material in the Van de Graaff Region of the Moon? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Could Imbrium Ejecta be the Source of the High-Th Material in the Van de Graaff Region of the Moon?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Could Imbrium Ejecta be the Source of the High-Th Material in the Van de Graaff Region of the Moon? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1612185