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Northwest Africa 12698 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12698 This is an OFFICIAL meteorite name. Abbreviation: NWA 12698 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 1178 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 188 approved meteorites classified as CR2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 4 Jul 2019 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12698 (NWA 12698) (Northwest Africa) Purchased: 2018 Classification: Carbonaceous chondrite (CR2) History: Found in the Arg-Shash region located at the Mauritanian-Algerian border by desert nomads in spring 2018. Physical characteristics: Single stone, ~90% fusion encrusted trapezoidal-shaped stone; saw cut reveals numerous chondrules up to 2 mm in diameter and scattered CAIs. Dark, gray-colored groundmass makes up about 30% of this meteorite; ubiquitous opaques visible. Petrography: (C. Agee, UNM) Microprobe examination showed many porphyritic chondrules most of which were type I. Many chondrules are metal-rich; often decorated or mantled with metal. Abundant fine grained, hydrous matrix throughout. Aluminous diopside detected. Geochemistry: (C. Agee, UNM) Forsterite Fa2.4±2.3, Fe/Mn=27±19, Cr2O3=0.29±0.12 wt%, n=12; enstatite Fs1.7±1.3Wo1.7±1.2, Fe/Mn=12±10, n=12. Classification: Carbonaceous chondrite (CR2), possibly paired with NWA 12197. Specimens: 20.1 g on deposit at UNM, DPitt holds the main mass. | ||||||||||||||||||||||||||||||
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; 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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||||
Crosslinks: |
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Revision history: |
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