Hello All, Shirokovsky is terrestrial, it is a pseudo-meteorite, it is man-made!
- does not contain typical accessory phases of stony-iron meteorites - accessory phases completely atypical - Olivine has a terrestrial oxygen isotopic composition - Pt/Ir ratio similar to that of terrestrial Cu-Ni ore deposits - has never been in space (noble gases no cosmic component!) - absence of cosmic-ray tracks corroborates noble gas study results (= bestätigen) - Olivine TL spectra similar to terrestrial peridotites Conclusion: Shirokovsky is manufactured, man-made! As for its nickel contents, see also the entry in the (online) Met.Bull. ... and, yes, I have a thin 2.7 gr slice of Shirokovsky with translucent olivines. I got that pseudo-pallasite in 2003 from Eric Olson. It doesn't pollute my collection but it sure looks a bit "pale-faced" when sitting next to a genuine pallasite like Esquel, Brenham, Admire, etc. Cheers, Bernd ______________________________________________ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
