Inferred Stratigraphy of the Letronne Crater Area, From Fused Lunar Data Sets

Details Inferred Stratigraphy of the Letronne Crater Area, From Fused Lunar Data Sets Inferred Stratigraphy of the Letronne Crater Area, From Fused Lunar Data Sets

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusm.p31b..04a&link_type=abstract

American Geophysical Union, Spring Meeting 2009, abstract #P31B-04

Mathematics

Logic

5420 Impact Phenomena, Cratering (6022, 8136), 5464 Remote Sensing, 5480 Volcanism (6063, 8148, 8450)

Scientific paper

A wealth of lunar remote sensing data is currently available in electronic format, with more anticipated from recent and current missions (eg. Kaguya, Chandrayaan-1). Advances in data fusion and georeferencing techniques allow all these data sets to be combined in novel ways, providing new insights into the stratigraphy of the Moon. We combined Clementine UVVIS, NIR, and Laser Altimeter data with Lunar Orbiter (LO) images and geological maps of the Humorum and Letronne areas. Clementine UVVIS and NIR data were further processed to provide standard colour ratio composites and FeO estimates. Iron content in the highlands south of Letronne crater was found to decrease radially away from the rim and correspond well with the hummocky ejecta texture apparent in the LO images. Because this iron anomaly extends almost 1 crater radius away from Letronne and is located in a topographic high, we do not believe it is due to lateral gardening transport, especially since nearby highland protrusions into Oceanus Procellarum show only minimal down slope movement. We suggest this hummocky, iron-rich material indicates that the Letronne impact excavated pre-existing mare material prior to being flooded by later basalts. Furthermore, an impact crater within Letronne excavates a lower iron (12% FeO) material from a depth of approximately 350m, indicating that the surface mare (17% FeO) is very shallow here and separated from any potential older mare by a unit of significantly lower iron content.

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