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| Northwest Africa 14198 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 14198 This is an OFFICIAL meteorite name. Abbreviation: NWA 14198 Observed fall: No Year found: 2021 Country: Algeria Mass:  703 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 279 approved meteorites classified as Mesosiderite. [show all] Search for other: Mesosiderites, Metal-rich meteorites | ||||||||||||||||||||||||||||||
| Comments: | Approved 31 Oct 2021 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 110:
Northwest Africa 14198 (NWA 14198) Tindouf, Algeria Purchased: 2021 Classification: Mesosiderite History: (F. Kuntz) Four weathered samples were purchased by Fabien Kuntz from a dealer in Tindouf, Algeria, in May 2021. Physical characteristics: The samples are dark brown, irregularly shaped, and have a wind-ablated, weathered exterior. The interior is a breccia of oxidized metal grains and silicates crosscut by abundant veins of oxidized Fe minerals. Petrography: Description and classification (A. Love, App): Sample is composed of: completely oxidized FeNi metal; associated veins of FeOH minerals; lithic and mineral clasts with brecciated anhedral, weakly-zoned, low-Ca pyroxene, plagioclase, rare olivine (~1 vol%) and lithic clasts with similar mineralogy. Within clasts: cataclastic texture is recognizable and contains poorly recrystallized contacts with smaller comminuted matrix; and olivine (<1 vol%) contains poorly-developed reaction coronas. Additional minerals are: merrillite, chromite, rare ilmenite and troilite; and both equant and lath shaped silica polymorphs and troilite. Geochemistry: (A. Love, App) Olivine (Fa38.1±3.1, Fe/Mn=39.1±2.0, n=3); low Ca pyroxene (Fs30.6±4.4Wo3.5±0.8, Fe/Mn=23.4±3.7, n=24); high Ca pyroxene (Fs18.4±1.7Wo40.1±0.3, Fe/Mn=18.9±0.9, n=3); plagioclase (An94.0±1.2Or0.1±0.1, n=8) Classification: Mesosiderite (estimated class A2). Mesosiderite based on ubiquitous oxidized metal and brecciated texture of silicates. Class A based on modal abundance of silicates (24 vol% plagioclase, 66 vol% Opx). Metamorphic type 2 based on poorly recrystallized cataclastic texture and reaction coronas around olivine. Specimens: F. Kuntz holds the main mass. A polished mount and an endcut weighing 38g are on deposit at App. | ||||||||||||||||||||||||||||||
| Data from: MB110 Table 0 Line 0: |
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| Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) Kuntz: Fabien Kuntz, France; Website (private address) |
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| Catalogs: |
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| References: | Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography:
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Statistics: This is 1 of 61 approved meteorites from Tindouf, Algeria (plus 1 impact crater) This is 1 of 1399 approved meteorites from Algeria (plus 33 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||