Physics – Geophysics
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pggp.rept..210p&link_type=abstract
In NASA, Washington Reports of Planetary Geology and Geophysics Program, 1986 p 210 (SEE N87-23341 16-91)
Physics
Geophysics
Infrared Spectra, Lunar Composition, Lunar Craters, Lunar Crust, Lunar Rocks, Near Infrared Radiation, Stratigraphy, Ejecta, Gabbro, Heterogeneity, Meteorite Craters, Peaks (Landforms)
Scientific paper
An Earth-based telescopic program to acquire near-infrared spectra of freshly exposed lunar material now contains data for 17 large impact craters with central peaks. Noritic, gabbroic, anorthositic and troctolitic rock types can be distinguished for areas within these large craters from characteristic absorptions in individual spectra of their walls and central peaks. Norites dominate the upper lunar crust while the deeper crustal zones also contain significant amounts of gabbros and anorthosites. Data for material associated with large craters indicate that not only is the lunar crust highly heterogeneous across the nearside, but that the compositional stratigraphy of the lunar crust is nonuniform. Crustal complexity should be expected for other planetary bodies, which should be studied using high spatial and spectral resolution data in and around large impact craters.
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