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On the ages and composition of lunar mare basalts

Hiesinger, H. and Jaumann, R. and Neukum, G. (1997) On the ages and composition of lunar mare basalts. EGS XXII General Assembly, Vienna, Austria, 21-25 April 1997.

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Abstract

Lunar volcanism lasted for about 1.5 b.y. and ceased at approximately2.5 b.y. ago. This implies that the temperature of the lunar mantle had then dropped below 1100 degrees C, necessary to produce basaltic melts on the Moon. From multispectral data sets it is also known that basalts from the lunar surface exhibit a broad variety in their composition, ranging from very low titanium (< 1 wt%) to high titanium (> 6 wt%). Investigation of the composition and the age of lunar mare basalts as well as estimates of their volumes allow to model the state and evolution of the Moon over time. In this context it is important to know, whether there exists any systematic relationbetween the age of a lunar basalt and its geochemical-mineralogical composition. Ages which are mainly based on stratigraphic superposition of units are often not precise enough or even wrong andtherefore misleading for this investigation. In order to quantisize the relationship between age and composition, new age determinations had to be obtained. We performed numerous crater counts on high resolution Lunar Orbiter IV images in combination with multispectral Galileo data from the Earth/Moon-Encounter 2. Our approach was to determine the ages for units which have been spectrally defined in a color ratio composite based on the Galileo data. From this data set we also calculated the mean titanium content of these units according to the empirical relation between the titanium content and the UV/VIS ratio. Results of this investigation will be presented for the Imbrium-, Serenitatis-, and Tranquillitatis basin, respectively.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=1997,
Title:On the ages and composition of lunar mare basalts
Authors:
AuthorsInstitution or Email of Authors
Hiesinger, H.UNSPECIFIED
Jaumann, R.UNSPECIFIED
Neukum, G.UNSPECIFIED
Date:1997
Status:Published
Keywords:Mond, Basalte, Alter, Titankonzentration
Event Title:EGS XXII General Assembly, Vienna, Austria, 21-25 April 1997
HGF - Research field:UNSPECIFIED
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:UNSPECIFIED
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):UNSPECIFIED
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Institut für Planetenerkundung
Deposited By: elib DLR-Beauftragter
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 09:51

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