Mathematics – Logic
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..751l&link_type=abstract
Lunar and Planetary Science, volume 27, page 751
Mathematics
Logic
Grimaldi, Mare-Highland Mixing, Moon, Spectroscopy
Scientific paper
The investigation of the composition of mare-highland boundaries carried out by Mustard et al. using multispectral images from the Galileo Solid State Imaging (SSI) instrument reveals the existence of three distinct mixing systematics across the mare-highland contacts in the region of southwestern Procellarum. The three basic types are narrow, moderate, and complex mixing gradients, and each implies a different set of fundamental processes that have contributed to the observed gradients. However, the 4 km resolution of the Galileo SSI data is too low to critically evaluate the exact properties of these boundaries, particularly in areas with rapidly changing abundances. The higher spatial resolution of Clementine UV/VIS data ( ~200 m/pixel, 5 filters between 0.415- 1.0 am-micrometers) allows the contact of mare-highland to be addressed in more detail. We have begun a series of studies to characterize and model mixing across mare-highland boundaries using these data, beginning with simple boundaries (sharp geologic contact, simple superposition of mare on highland). In this study, the contact between the Grimaldi mare and the highland on the southern edge is investigated through the spectral mixture analysis of Clementine UV/VIS data. Our preliminary analyses reveals the boundary consists of three mixing zones: moderate, steep, and moderate. The moderate zones on the mare and highland sides of the contact are approximately 30km wide, while the steep zone is ~6-8 km wide. We are currently examining other such simple boundaries to determine if the physical dimensions and properties are consistent across the moon, and thus a chracteristic properties of simple boundaries.
He Guowei
Li Lexin
Mustard John F.
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