![]() |
||
|
Northwest Africa 8562 | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 8562 This is an OFFICIAL meteorite name. Abbreviation: NWA 8562 Observed fall: No Year found: 2014 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 127 approved meteorites classified as Eucrite-unbr. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 12 Oct 2014 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 103:
Northwest Africa 8562 (NWA 8562) (Northwest Africa) Purchased: 2014 Classification: HED achondrite (Eucrite, unbrecciated) History: Purchased by Abdelhadi Aithiba in Morocco, 2014. Physical characteristics: Single stone, smooth, black, weathered fusion crust exterior, one side showing rough secondary fusion crust surface. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount reveals approximately 60% pyroxene and 35% plagioclase, pyroxenes show igneous zoning, many are aggregates of ~50 μm grains in cm-sized clusters. Both pyroxene and plagioclase occur as poikiloblasts. Fayalitic olivine present. Ubiquitous troilite, ilmenite, and silica. Unbrecciated. Geochemistry: (C. Agee and N. Muttik, UNM) Pyroxene Fs50.0±6.4Wo12.3±4.1, Fe/Mn=31±2, n=22; pyroxene ranges from pigeonite Fs41.6Wo8.4En50.0 to ferro-augite Fs61.4Wo22.6En16.0; olivine Fa85.9±0.9, Fe/Mn=43±1, n=5; plagioclase An90.3±0.4Ab9.0±0.3Or0.6±0.1, n=5. Classification: Eucrite (unequilibrated basaltic, unbrecciated). Presence of metastable ferro-augite, and the pronounced pyroxene Fe-enrichment trend is consistent with Type 1 eucrites (Takeda and Graham, 1991). Specimens: 22.0 g including a probe mount on deposit at UNM, Abdelhadi Aithiba holds the main mass. | ||||||||||||||||||||||||||||
Bibliography: |
| ||||||||||||||||||||||||||||
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) |
||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
| ||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |