13.58g Lodranite Rare Primitive Achondrite Meteorite fragment I NWA 11901
|Northwest Africa 11901|
|Basic information||Name: Northwest Africa 11901
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11901
Observed fall: No
Year found: 2017
Country: Western Sahara
Mass: 662 g
This is 1 of 81 approved meteorites classified as Lodranite.
|Comments:||Approved 31 Aug 2018|
Writeup from MB 107:
Northwest Africa 11901 (NWA 11901)
Classification: Primitive achondrite (Lodranite)
History: Purchased by Dustin Dickens from nomad near Dahkla in Western Sahara.
Physical characteristics: Many identically appearing pieces. Weathered exterior. A saw cut reveals an interior of coarse green and brown crystals. Opaque grains are scattered throughout.
Petrography: (C. Agee, UNM) This meteorite consists primarily of olivine and Cr-diopside; low-Ca pyroxene and plagioclase are absent. Most grains are in the 1-3 mm size range.
Geochemistry: (C. Agee, UNM) Olivine Fa11.0±0.1, Fe/Mn=38±5, Cr2O3=0.03±0.01 (wt%), n=4; diopside Fs5.0±0.6Wo41.4±2.9, Fe/Mn=14±1, Cr2O3=1.09±0.06 (wt%)n=7.
Classification: Lodranite, opx-absent
Specimens: 22.9 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass.
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