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The South Pole-Aitken basin region, Moon: GIS-based geologic investigation using Kaguya elemental information



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King, Kyeong Ja y Dohm, James M. y Williams, Jean-Pierre y Ruiz Pérez, Javier y Hare, Trent M. y Hasebe, Nobuyuki y Karouji, Yuzuru y Kobayashi, Shingo y Hareyama, Makoto y Shibamura, Eido y Kobayashi, Masanori y Uston, Claude d' y Gasnault, Olivier y Forni, Olivier y Maurice, Sylvestre (2012) The South Pole-Aitken basin region, Moon: GIS-based geologic investigation using Kaguya elemental information. Advances in space research, 50 . pp. 1629-1637. ISSN 0273-1177

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URL Oficial: http://www.journals.elsevier.com/advances-in-space-research/


Using Geographic Information Systems (GIS), we performed comparative analysis among stratigraphic information and the Kaguya (SELENE) GRS data of the 2500-km-diameter South Pole-Aitken (SPA) basin and its surroundings. Results indicate chat the surface rock materials (including ancient crater materials, mare basalts, and possible SPA impact melt) are average to slightly elevated in K and Th with respect to the rest of the Moon. Also, this study demonstrates that K and Th have not significantly changed since the formation of PA. The elemental signatures of the impact basin of Fe, Ti, Si, O through time include evidence for resurfacing by ejecta materials and late-stage volcanism. The oldest surfaces of SPA are found to be oxygen-depleted during the heavy bombardment period relative to later stages of geologic development, followed by both an increase in silicon and oxygen, possibly due to ejecta sourced from outside of SPA, and subsequent modification due to mare basaltic volcanism, which increased iron and titanium within SPA. The influence of the distinct geologic history of SPA and surroundings on the mineralogic and elemental abundances is evident as shown in our investigation.

Tipo de documento:Artículo
Palabras clave:Kaguya (SELENE); Gamma-Ray Spectrometer; South Pole-Aitken basin; Elemental maps; Impact
Materias:Ciencias > Geología > Geodinámica
Código ID:33046
Depositado:10 Sep 2015 10:22
Última Modificación:10 Sep 2015 10:22

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