Hello! You may also check out "Handbook of elemental Abundances in Meteorites" by Brian Mason. There is a section that discusses osmium abundances written by John Morgan, beginning on page 451. He summarized the results of measurements on chondrites, achondrites, and irons. Table 7 there lists figures for 37 different irons. He also references the original studies.
This can be a difficult book to find. I am doing a final email check as I pack my bags to head out on a business trip for the week; if I had time, I'd post more details. I will be back late Friday. If you cannot find or get a hold of the book by then, shoot me an email and I will send the info when I return. Frank Prochaska -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of E.P. Grondine Sent: Saturday, April 20, 2002 6:46 PM To: [EMAIL PROTECTED] Subject: [meteorite-list] Re: Osmium ratios in irons and parent body size(s) Great thanks, Bernd - once again your efforts come to the rescue - If I understand the results of your database search, what it amounts to is that exactly 2 people are working on recovering the hard data which will allow for the accurate estimate of parent body size(s). The rest of the work on this problem, and there is plenty of it, is "theoretical" at best. I'm going to have to go off the meteorite list again in a few days, so if anyone else has anything to offer on this problem, please post before then... ep --- Bernd Pauli HD <[EMAIL PROTECTED]> wrote: > E.P. Grondine wrote: > > > Any idea as to osmium ratios in irons ...? > > Hi E.P. and List, > > Here is what I can come up with: > > CREASER R.A. et al. (1992) Isotopic analysis of Os > and Re with negative > thermal ion mass spectrometry and application to the > age and evolution > of iron meteorites (Meteoritics 27-3, 1992, A212): > > Osmium Bennett County Coahuila Tocopilla > > > Os 59.610.1 ppm 9.8710.02 > 1.06210.002 > 187 Os/188 Os 0.1250315 0.1415817 0.16913115 > > > Osmium Negrillos Cape York C.Diablo > Tlacotepec > > Os 69.410.1 > 187Os / 188Os 0.1231512 0.1337419 0.13464111 > 0.1206818 > > > ESAT T. et al. (1991) Negative thermal ionization > and isotope dilution > applied to the determination of Re and Os > concentrations and Os isotopic > compositions in irons (Meteoritics 26-4, 1991, > A333): > > Osmium Henbury Cape York > Kyancutta > > Os 14.68 ppm 2.497 ppm > 0.8746 ppm > 187Os / 186Os 1.066 1.118 > 1.254 > > > BROOKS R.R. et al. (1992) Elemental abundance data > for the Manitouwabing > iron meteorite (Meteoritics 27-2, 1992, 186): > Manitouwabing Madoc > Osmium 0.73 5g/g 5.19 5g/g > > > Best wishes, > > Bernd > > ______________________________________________ > Meteorite-list mailing list > [EMAIL PROTECTED] > http://www.pairlist.net/mailman/listinfo/meteorite-list __________________________________________________ Do You Yahoo!? Yahoo! Games - play chess, backgammon, pool and more http://games.yahoo.com/ ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
