29.57g Eucrite Monomict Slice | HED NWA 8555
| Northwest Africa 8555 | |||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic information |
Name: Northwest Africa 8555 This is an OFFICIAL meteorite name. Abbreviation: NWA 8555 Observed fall: No Year found: 2013 Country: (Northwest Africa) Mass:  2.92 kg |
||||||||||||||||||||||
| Classification history: |
This is 1 of 187 approved meteorites classified as Eucrite-mmict. [show all] Search for other: Achondrites,Eucrites, and HED achondrites |
||||||||||||||||||||||
| Comments: | Approved 18 Oct 2014 | ||||||||||||||||||||||
| Writeup |
Writeup from MB 103:
Northwest Africa 8555 (NWA 8555) (Northwest Africa) Purchased: 2013 Classification: HED achondrite (Eucrite, monomict) History: Purchased by Brahim Tahiri from a Moroccan hunter and sent to his partner Sean Tutorow for classification, April, 2013. Physical characteristics: Two matching stones, 1729 g and 1198 g. Irregular weathered exterior. Saw cut reveals a breccia with tan lithic clasts up to 1 cm set in a dark-gray matrix. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount show basaltic eucrite clasts cross-cut by shock melt veins, pyroxenes show exsolution lamellae. Ubiquitous chromite, ilmenite, and silica, some barite found. Moderate weathering. Geochemistry: (C. Agee and N. Muttik, UNM) Low-Ca pyroxene Fs60.7±2.2Wo4.5±2.4, Fe/Mn=33±1, n=12; high-Ca pyroxene Fs29.3±1.5Wo41.1±1.6, Fe/Mn=33±1, n=12; plagioclase An89.0±1.2, n=8. Classification: Achondrite (monomict eucrite) Specimens: 59.78 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass. |
||||||||||||||||||||||
| Data from: MB103 Table 0 Line 0: |
|
||||||||||||||||||||||
| Institutions and collections |
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015) | ||||||||||||||||||||||
We Also Recommend
