22.70g Eucrite Slice Monomict Basaltic Breccia
| Northwest Africa 12929 | |||||||||||||||||||||||||||||
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| Basic information |
Name: Northwest Africa 12929 This is an OFFICIAL meteorite name. Abbreviation: NWA 12929 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass:  23.7 kg |
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| Classification history: |
This is 1 of 272 approved meteorites classified as Eucrite-mmict. |
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| Comments: | Approved 21 Nov 2019 | ||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 108:
Northwest Africa 12929 (NWA 12929) (Northwest Africa) Purchased: 2016 Classification: HED achondrite (Eucrite, monomict) History: Purchased Dec. 2018 by Dustin Dickens in Morocco from anonymous dealer. Physical characteristics: Many identically appearing pieces, desert weathered exterior, broken surface reveals a dark, fine grained interior. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows mild brecciation with approximately 60% pyroxene and 35% plagioclase. Many pyroxenes have exsolution lamellae. Minor silica and troilite observed. Shock melt veins are present. Geochemistry: (C. Agee, UNM) Low-Ca pyroxene Fs61.6±1.8Wo3.3±2.4, Fe/Mn=32±0, n=9; high-Ca pyroxene Fs36.7±9.5Wo33.4±10.9, Fe/Mn=31±0, n=4; plagioclase An89.4±3.1, n=7. Classification: Monomict basaltic eucrite, equilibrated. |
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| Data from: MB108 Table 0 Line 0: |
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| Institutions and collections |
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; (institutional address; updated 12 Feb 2015) | ||||||||||||||||||||||||||||
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