37.40g Howardite Meteorite Slice I NWA 11899 I Beautiful HED Slice
|Northwest Africa 11899|
Name: Northwest Africa 11899
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11899
Observed fall: No
Year found: 2017
Mass: 16 kg
This is 1 of 356 approved meteorites classified as Howardite. [show all]
Search for other: Achondrites, HED achondrites, and Howardites
|Comments:||Approved 31 Aug 2018|
Writeup from MB 107:
Northwest Africa 11899 (NWA 11899)
Classification: HED achondrite (Howardite)
History: Purchased by Dustin Dickens from Nomad in Mali.
Physical characteristics: Many identically appearing pieces. Fusion crusted exterior. A saw cut reveals a breccia with light and dark clasts set in light-brown matrix.
Petrography: (C. Agee, UNM) This meteorite is a polymict breccia consisting of approximately 60% diogenite and 40% eucrite clasts. Accessory Fe-Ni metal, Fe-sulfide, and silica observed.
Geochemistry: (C. Agee, UNM) diogenite low-Ca pyroxene Fs25.1±2.5Wo3.6±2.2, Fe/Mn=30±2, n=10; eucrite low-Ca pyroxene Fs49.7±5.2Wo4.8±2.8, Fe/Mn=29±2, n=7;.plagioclase AN93.1±1.2, n=7.
Specimens: 22.8 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass.
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