[meteorite-list] Oxygen Isotope Ratios was Lunar velocities...

From: Phil <Phil_at_meteoritecentral.com>
Date: Thu Apr 22 09:44:44 2004
Message-ID: <000201c0b6ff$6a0b1200$6643989e_at_t7f8c6>

From: E.L. Jones <jonee_at_epix.net>


> I ask again , are the oxygen isotope ratios (O16-O17 -O18) in tektite
glass indicitive of a lunar origin or an Earthly origin? If this analysis
hasn't been done ..Why Not? It is good enough for evidence of lunar origin
in meteorites-- why not tektites?

O-isotopes may not be the best indicator of tektite origins. The strontium
(Sr-87/86) isotopes show large positive values which are characteristic of
older continental crustal material. Beryllium-10 in australites is also
consistent with terrestrial sediment measurements.

Phil
Received on Tue 27 Mar 2001 11:32:54 AM PST