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Northwest Africa 14682 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 14682 This is an OFFICIAL meteorite name. Abbreviation: NWA 14682 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: 14 kg | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 136 approved meteorites classified as Eucrite-unbr. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 16 May 2022 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 111:
Northwest Africa 14682 (NWA 14682) (Northwest Africa) Purchased: 2020 Classification: HED achondrite (Eucrite, unbrecciated) History: Purchased January, 2020, by Mark Lyon from a Northwest African dealer Physical characteristics: Single stone with black fusion crust. Interior shows unbrecciated texture with millimeter-sized dark green pyroxenes and white plagioclase crystals. Cut and broken surfaces shows equigranular, medium grained, basaltic texture. Petrography: (A. Ross, UNM; D. Dickens, NMMS; C. Agee, UNM) Microprobe examination of a polished mount shows approximately equal amounts of pyroxene and plagioclase grains often in poikiloblastic arrangement. Some pyroxenes have exsolution. Ubiquitous silica, ilmenite, and troilite. No metal was observed. Geochemistry: (A. Ross, UNM) Low-Ca pyroxene Fs61.7±0.2Wo1.8±0.2, Fe/Mn=33±1, n=7; high-Ca pyroxene Fs29.5±5.0Wo40.0±5.8, Fe/Mn=32±2, n=5; plagioclase An84.7±4.3, n=7; Classification: Achondrite (equilibrated unbrecciated eucrite). Equilibration and clear compositional separation of low-calcium and high-calcium pyroxenes is consistent with type 6 eucrites. Specimens: 28.6 g including a probe mount on deposit at UNM, Mark Lyon holds the main mass. | ||||||||||||||||||||||||||||
Data from: MB111 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) |
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Catalogs: |
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References: | Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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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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