[meteorite-list] Te-1 / Tafassasset

From: Stephan Kambach <stephan.kambach_at_meteoritecentral.com>
Date: Sun Oct 1 13:58:55 2006
Message-ID: <002601c6e583$387e0fe0$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): d17O = ?0.85?, d18O = +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.
Received on Sun 01 Oct 2006 01:58:24 PM PDT