[meteorite-list] Te-1 / Tafassasset

[Stephan Kambach]

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 µm,
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): δ17O = –0.85‰, δ18O = +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.
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