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Northwest Africa 8725 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 8725 This is an OFFICIAL meteorite name. Abbreviation: NWA 8725 Observed fall: No Year found: 2014 Country: (Northwest Africa) Mass: 694 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 185 approved meteorites classified as CR2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 29 Jan 2015 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 104:
Northwest Africa 8725 (NWA 8725) (Northwest Africa) Found: 2014 Classification: Carbonaceous chondrite (CR2) History: Recovered in April 2014 near the borders of Mauritania, Western Sahara and Algeria. Purchased in Mauritania in June 2014. Physical characteristics: Single stone. Shiny black, irregular weathered exterior with some CAIs visible. A saw cut reveals many distinct chondrules (850±500 μm, n=17) and scattered small CAIs set in a brown matrix. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous porphyritic chondrules, many mantled by, or including, Fe-Ni metal blebs or grains which make up ~10% of this meteorite; AOA’s present, ~40% fine-grained matrix with phyllosilicates, FeNi-sulfide and troilite detected. Geochemistry: (C. Agee and N. Muttik, UNM) Ferroan chondrule olivine Fa9.4±15.4, n=27, Fe/Mn=51±29, Cr2O3=0.19±0.09, n=23; Forsteritic chondrule olivine Fa0.9±0.5, Cr2O3=0.28±0.19, n=4; enstatite Fs2.0±0.7Wo2.0±3.2, n=16; aluminous diopside Fs1.6±0.5Wo35.5±6.9, n=8. Classification: Carbonaceous chondrite (CR2). Moderately weathered, low shock stage. Specimens: 21 g including a probe mount on deposit at UNM, DPitt holds the main mass. | ||||||||||||||||||||||||||||||
Data from: MB104 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; Website (institutional address; updated 12 Feb 2015) DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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