[meteorite-list] Te-1 / Tafassasset
From: Stephan Kambach <stephan.kambach_at_meteoritecentral.com>
Date: Sun Oct 1 21:38:27 2006 Message-ID: <000d01c6e57d$95d254e0$0401a8c0_at_a9t9o8> Dear List-Members Should somebody be interested in it, from Te-1 (PAC-UNG, Brachinite-like) to acquire a crusted full slice of 474.79 grammes, he can contact me for further informations (picture, price, exchange etc.). "Te-1" is desrcibed in the bulletin under "Tafassasset". Regards from Germany, Stephan Kambach Extract from the Met.Bulletin 86 - Meteorit: Tafassasset /last part .........A 3.61 kg stone, labeled "Te-1", was found in 2000 March, probably on the same expedition noted above, and is reported by J. Otto (Frei) to have been found in the Tenere Desert at 20?45.8' N, 10?26.5' E. Classification (J. Otto and A. Ruh, Frei): a primitive achondrite; partly covered with black fusion crust; shows a recrystallization texture with abundant 120? triple junctions dominated by olivine (56 vol%, 100?700 ?m, Fa28.7, 0.06 wt% CaO) and poikilitic orthopyroxene (23 vol%, up to 3 mm, Fs25.4Wo3.6) with exsolved clinopyroxene (Fs12.7Wo39.7); Fe-Ni metal is irregulary distributed (~10 vol%, up to 5 mm); poikilitic plagioclase occurs in interstices (6.5 vol%, An38.5Or3.7); troilite (~3.5 vol%, 0.01 wt% Ni); chromite (~1 vol%, Fe/(Fe + Mg) = 0.817, Cr/(Cr + Al) = 0.818). Oxygen isotopes (R. Clayton and T. Mayeda, UChi): ?17O = ?0.85?, ?18O = +1.70?, different from other achondrites. Noble gases (L. Schultz, MPI): data compatible with those of brachinites; exposure age is ~45 Ma. Shock stage, S1/2; weathering grade, W0. Specimens: main mass with Christian Stehlin, Basel; type specimen, 30.2 g and thin section, Frei. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://six.pairlist.net/pipermail/meteorite-list/attachments/20061001/c8c51f35/attachment.html Received on Sun 01 Oct 2006 01:18:11 PM PDT |
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