Bibcode
Schuraytz, B. C.; Lindstrom, D. J.; Martinez, R. R.; Sharpton, V. L.; Marin, L. E.
Bibliographical reference
In Lunar and Planetary Inst., The Twenty-Fifth Lunar and Planetary Science Conference. Part 3: P-Z p 1221-1222 (SEE N94-35448 11-91)
Advertised on:
3
1994
Citations
3
Refereed citations
2
Description
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.