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Remote sensing studies of lunar dark-halo impact craters - Preliminary results and implications for early volcanismA summary of the nature and origin of lunar dark-halo craters is presented. New remote sensing data for dark-haloed impact craters were obtained and interpreted. A variety of spectral, thermal, radar, and photogeologic data are presented which confirm the hypothesis that Copernicus H crater excavated mare basalt from beneath lighter deposits emplaced by the Copernicus impact event. Multispectral imagery suggests that analogous impact re-exposure of basaltic material on the ejecta blankets of other large Copernican and Eratosthenian craters resulted in the formation of other dark-halo craters. Preliminary analyses of near-infrared spectra of dark-haloed impact craters in the Schickard-Schiller region are consistent with the hypothesis that basaltic material was excavated from beneath light plains. These light plains may have been emplaced as a result of the Orientale impact event. Additional evidence is presented which suggests that both pre- and post-Orientale volcanic activity was more prevalent in this region than has previously been recognized.
Document ID
19820048182
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hawke, B. R.
(Hawaii Univ. Honolulu, HI, United States)
Bell, J. F.
(Hawaii, University Honolulu, HI, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1982
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: Houston, TX
Start Date: March 16, 1981
End Date: March 20, 1981
Accession Number
82A31717
Funding Number(s)
CONTRACT_GRANT: NAGW-42
CONTRACT_GRANT: NSG-7312
Distribution Limits
Public
Copyright
Other

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