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Northwest Africa 1242 (MES-A2)
Country:
State/District: Sahara
Co-ordinates:
Date of find: 1985
Total known weight: 7 kg (approx.)
Number of pieces: 2
Type: Mesosiderite, subgroup A2
Shock Stage: S1
Weathering Stage: W0
Mineral analyses:
Pyroxene Fs33
plagioclase: An92; kamacite: 5.8 wt% Ni; orthopyroxene: Fs33 Wo3
Pairings: not known
Synonyms: "Libya"
Show Description and references (MetBase)

Two fully ablated pieces of a mesosiderite (total known weight ~7kg) were found near the village of Gillio by unknown oil exploration workers and put into service as bookends for 13 years; purchased in 1998 by an anonymous dealer; reports of a strewn field are presently unconfirmed; classification and mineralogy: Type 2A; contains scarce, metal nodules up to 19mm in diameter; Mg-rich pyroxene overgrowths on Ca-pyroxene clasts; moderate resorption of plagioclase; orthopyroxene (Fs33Wo3) replaces pigeonite (Fs34Wo8) and exsolved augite (Fs43Wo42); plagioclase (An92); pyrrhotite, chromite (Al2O3=8.4 wt%); kamacite, 5.8 wt% Ni; rare taenite (42 wt% Ni), silica and phosphate; shock stage S1; weathering grade W0, S.S.Russell et al., Met. Bull. 86, MAPS, 2002, 37 (Suppl.), p.A157. Description; may be paired with As Sarir, K.Mazurek, Meteorite!, 2003, 9(4), p.38.
The meteorite data copied from MetBase 7.0 for Windows.
For information about this software please contact the Author: Joern Koblitz, The MetBase Library of Meteoritics and Planetary Sciences, Benquestrasse 27, D-28209 Bremen, Germany
Phone: +49 421 24 100 24 Fax: +49 421 24 100 99
Available specimens for Northwest Africa 1242
Click to see detailsDescription: End cut
Size: 3.2 x 1.5 x 1.2 cm
Weight: 7.69 gr
Price: US$ 150.00
Click to see detailsDescription: Nice full slice. One side polished.
Size: 7.5 x 5.5 x 0.2 cm
Weight: 38 gr
Price: US$ 790.00
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Ungrouped
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Northwest Africa 2999 (ANGR)
Zaklodzie (AUB-AN)
Northwest Africa 6267 (ADIO)
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Great Sand Sea 010 (AHOW)
Northwest Africa 6274 (AHOW)
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