Distribution of siderophile and other trace elements in melt rock at the Chicxulub impact structure

Details Distribution of siderophile and other trace elements in melt rock at the Chicxulub impact structure Distribution of siderophile and other trace elements in melt rock at the Chicxulub impact structure

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994lpi....25.1221s&link_type=abstract

In Lunar and Planetary Inst., The Twenty-Fifth Lunar and Planetary Science Conference. Part 3: P-Z p 1221-1222 (SEE N94-35448 11

Mathematics

Logic

1

Cretaceous-Tertiary Boundary, Impact Melts, Meteorite Craters, Meteoritic Composition, Meteoritic Damage, Mineralogy, Projectile Cratering, Rocks, Trace Elements, Core Sampling, Cratering, Ejecta, Electron Probes, Impact Damage, Isotopes, Neutron Activation Analysis

Scientific paper

Recent isotopic and mineralogical studies have demonstrated a temporal and chemical link between the Chicxulub multiring impact basin and ejecta at the Cretaceous-Tertiary boundary. A fundamental problem yet to be resolved, however, is identification of the projectile responsible for this cataclysmic event. Drill core samples of impact melt rock from the Chichxulub structure contain Ir and Os abundances and Re-Os isotopic ratios indicating the presence of up to approx. 3 percent meteoritic material. We have used a technique involving microdrilling and high sensitivity instrumental neutron activation analysis (INAA) in conjunction with electron microprobe analysis to characterize further the distribution of siderophile and other trace elements among phases within the C1-N10 melt rock.

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