Martian Meteorite Beautiful Slice 56.9g - NWA 10961 I Martian SHERGOTTITE
On Offer: MARTIAN SHERGOTTITE METEORITE SLICE 56.9 grams
Dimensions: Approximately 107.9mm x 108.7mm x 2.5mm
|Northwest Africa 10961|
Name: Northwest Africa 10961
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10961
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 2.22 kg
This is 1 of 189 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).
|Comments:||Approved 13 Jan 2017|
Writeup from MB 106:
Northwest Africa 10961 (NWA 10961)
Purchased: 2016 Sep
Classification: Martian meteorite (Shergottite)
History: Purchased by Ben Hoefnagels in September 2016 from a dealer in Taliouine, Morocco.
Physical characteristics: A single mass (2220 g) with a brown, weathered exterior. The fresh interior is mostly pale green with small dark brown patches and black grains visible.
Petrography: (A. Irving and S. Kuehner, UWS) Poikilitic texture. Large, twinned, essentially unzoned pyroxene oikocrysts (with undulose extinction) enclose chadacrysts of olivine (some brownish in thin section) and Cr-rich chromite. Very sparse maskelynite (~2 vol.%) occurs as interstitial grains. Other accessory minerals are Ti-bearing chomite, ilmenite and rare Mg-merrillite. Pockets of dark, quenched shock glass are present.
Geochemistry: Olivine (Fa29.5-31.2, FeO/MnO = 41-46, N = 3), orthopyroxene (Fs19.4-20.7Wo2.7-3.6, FeO/MnO = 20-28, N = 3), augite (Fs13.0-13.8Wo38.2-35.0, FeO/MnO = 22-24, N = 2), maskelynite (An53.8-55.6Or1.1-1.0, N = 2).
Classification: Martian meteorite (shergottite, poikilitic, ultramafic).
Specimens: 22 g including two polished thin sections at PSF; remainder with Mr. B. Hoefnagels.
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