Meteoritic material at four Canadian impact craters

Details Meteoritic material at four Canadian impact craters Meteoritic material at four Canadian impact craters

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980gecoa..44.1015w&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 44, July 1980, p. 1015-1022.

Statistics

15

Chondrites, Meteorite Craters, Meteoritic Composition, Neutron Activation Analysis, Achondrites, Asteroids, Canada, Rocks, Ureilites, Meteorites, Impacts, Craters, Earth, Samples, Terrestrial, Patterns, Naa, Element Ratios, Melts, Enrichment, Classification, Comparisons, Procedures, Data, Siderophile Elements, Volatile Elements, Spectroscopy, Nicholson Lake N.W.T. Crater, Canada, Glow Lake Crater, Abundance, Mistastin Crater, Wanapitei Lake Crater, Apollo Asteroids

Scientific paper

Eleven impact melt and six basement rock samples from four craters were analyzed by neutron activation for Au, Co, Cr, Fe, Ge, Ir, Ni, Os, Pd, Re and Se. Wanapitei Lake, Ontario: the impact melts show uniform enrichments corresponding to 1-2% C1-chondrite material. Interelement ratios (Co/Cr, Ni/Cr, Ni/Ir) suggest that the impacting body was a C1-, C2-, or LL-chondrite. Nicholson Lake, North West Territory: Ni, Cr and Co are distinctly more enriched than Ir and Au which tentatively suggests an olivine-rich achondrite (nakhlite or ureilite). Gow Lake, Saskatchewan and Mistastin, Labrador: small enrichments in Ir and Ni; both the low Ir/Ni ratios and low Cr content suggest iron meteorites, but the signals are too weak for conclusive identification. A tentative comparison of meteoritic signatures at 10 large, greater than or equal to 4 km craters and their presumed celestial counterparts (13 Apollo and Amor asteroids) shows more irons and achondrites among known projectile types, and a preponderance of S-type objects, having no known meteoritic equivalent, among asteroids. It is not yet clear that these differences are significant, in view of the tentative nature of the crater identifications and the limited statistics.

Affiliated with

Also associated with

No associations

Rating

Meteoritic material at four Canadian impact craters does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Meteoritic material at four Canadian impact craters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Meteoritic material at four Canadian impact craters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-803835