The age of the Kara impact structure, Russia

Details The age of the Kara impact structure, Russia The age of the Kara impact structure, Russia

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998m%26ps...33..361t&link_type=abstract

Meteoritics & Planetary Science, vol. 33, no. 2, pages 361-372.

Physics

18

Scientific paper

For the ~ 65 km sized Kara impact structure close to the polar Ural, we report an age of 70.3 +/- 2.2 Ma (2(), defined by the mean of 40Ar-39Ar plateau ages for three glassy or crystalline impact melt rocks cleaned from mineral and rock clasts. The fine structure of the age spectra of these samples can quantitatively be simulated by modeling taking into account 39Ar recoil effects, without assuming the presence of excess argon. The calculations corroborate our age results by showing that 39Ar recoil does not affect the plateau fractions. Previously, Kara has been proposed as probable K/T impact site, or was related to the Campanian-Maastrichtian boundary at 73 Ma. At the 2( level, both suggestions are ruled out by the well-constrained age for the Kara impact structure.

Affiliated with

Also associated with

No associations

Rating

The age of the Kara impact structure, Russia 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 The age of the Kara impact structure, Russia, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The age of the Kara impact structure, Russia will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-958510