Computer Science
Scientific paper
Mar 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991metic..26...31g&link_type=abstract
Meteoritics (ISSN 0026-1114), vol. 26, March 1991, p. 31-39. Research supported by Canadian Donner Foundation, NSERC, and Univer
Computer Science
8
Chemical Analysis, Impact Melts, Meteoritic Composition, Petrography, Planetary Craters, Rocks, Crystallinity, Feldspars, Gravels, Quartz, Textures, Earth, Craters, Cratering, Melts, New Quebec Crater, Canada, Iridium, Samples, Terrestrial, Shock Effects, Impacts, Description, Chemistry, Mineralogy, Composition, Major Elements, Enrichment, Age, Origin, Formation, Petrology, Laboratory Studies, Procedure, Matrix, Data, Trace Elements
Scientific paper
The present impact melt rock samples from gravel deposits near the rim of the New Quebec Crater are noted to have cryptocrystalline matrices with microlites of andesite and pigeonite. Despite a major element composition modelable as a mix of granitic gneisses making up the target rocks, they also show enrichments in Cr, Co, Ni, and Ir. While interelement ratios suggest a chondritic impacting body, they are not specific as to type. On the bases of the best plateau ages, the age of the New Quebec impact is suggested to be 1.4 + or - 0.1 Ma; this places it before the first major Pleistocene glaciation.
Attrep Moses Jr.
Blyth Robertson P.
Bottomley R. B.
Bouchard M. A.
Grieve Richard A. F.
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