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Geomorphic terrains and evidence for ancient volcanism within northeastern South Pole-Aitken Basin

Noah E. Petro, Scott C. Mest and Yaron Teich
Geomorphic terrains and evidence for ancient volcanism within northeastern South Pole-Aitken Basin (in Recent advances and current research issues in lunar stratigraphy, William A. Ambrose (editor) and David A. Williams (editor))
Special Paper - Geological Society of America (March 2011) 477: 129-140

Abstract

The interior of the enigmatic South Pole-Aitken Basin has long been recognized as being compositionally distinct from its exterior. However, the source of the compositional anomaly has been subject to some debate. Is the source of the iron-enhancement due to lower-crustal/upper-mantle material being exposed at the surface, or was there some volume of ancient volcanism that covered portions of the basin interior? While several obvious mare basalt units are found within the basin and regions that appear to represent the original basin interior, there are several regions that appear to have an uncertain origin. Using a combination of Clementine and Lunar Orbiter images, several morphologic units are defined based on albedo, crater density, and surface roughness. An extensive unit of ancient mare basalt (cryptomare) is defined and, based on the number of superimposed craters, potentially represents the oldest volcanic materials within the basin. Thus, the overall iron-rich interior of the basin is not solely due to deeply derived crustal material, but is, in part due to the presence of ancient volcanic units.


ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Serial Volume: 477
Title: Geomorphic terrains and evidence for ancient volcanism within northeastern South Pole-Aitken Basin
Title: Recent advances and current research issues in lunar stratigraphy
Author(s): Petro, Noah E.Mest, Scott C.Teich, Yaron
Author(s): Ambrose, William A.editor
Author(s): Williams, David A.editor
Affiliation: NASA, Goddard Space Flight Center, Greenbelt, MD, United States
Affiliation: University of Texas at Austin, Bureau of Economic Geology, Austin, TX, United States
Pages: 129-140
Published: 201103
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 54
Accession Number: 2011-050333
Categories: Extraterrestrial geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, geol. sketch map
Secondary Affiliation: Arizona State University, USA, United StatesPlanetary Science Institute, USA, United StatesWalter Johnson High School, Bethesda, MD, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201128
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