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| Northwest Africa 14691 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 14691 This is an OFFICIAL meteorite name. Abbreviation: NWA 14691 Observed fall: No Year found: 2021 Country: Algeria Mass:  159.3 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 522 approved meteorites classified as Diogenite. [show all] Search for other: Achondrites, Diogenites, and HED achondrites | ||||||||||||||||||||||||||||||
| Comments: | Approved 19 Mar 2022 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 111:
Northwest Africa 14691 (NWA 14691) Algeria Purchased: 2021 Classification: HED achondrite (Diogenite) History: Fabien Kuntz purchased the 159.3 g stone from a dealer in Tindouf, Algeria, in December 2021. Physical characteristics: The exterior is greenish brown in color and shows a crystalline texture devoid of fusion crust. The interior is yellowish-green and green colored crystals of two distinct grainsizes. Petrography: Description and classification (A. Love, App) The sample is composed of coarse-grained (avg. grain size 2969 μm, n=10) allotriomorphic granular-textured regions of orthopyroxene surrounded by finer-grained (avg. grain size =356 μm, n=50) granoblastic regions of pyroxene and rounded to elongate olivine (avg. grain size 64 μm, n=14) that occurs interstitial to and as chadacrysts enclosed within pyroxene (similar to GRA98108). Additional minerals are: chromite, plagioclase, troilite. Modal abundances (vol%): Opx (85); Ol(9); plag (3); chromite (1) and troilite (1). Geochemistry: (A. Love, App) Olivine (Fa27.4±0.5, Fe/Mn=42.6±1.6, n=10); low Ca pyroxene (Fs23.1±0.6Wo3.4±0.5, Fe/Mn=27.5±0.9, Mg#=76.0±0.7, n=12). Plagioclase (An89.5±1.5Or0.3±0.1, n=8). Classification: HED achondrite (Olivine-bearing diogenite) Based on mineralogy, modal abundance of olivine, Mg# of Fe/Mn ratios of Opx, sample is a diogenite. Specimens: Fabien Kuntz holds the main mass. A polished thin section and an endcut and slice weighing 20.2 g are on deposit at App. | ||||||||||||||||||||||||||||||
| Data from: MB111 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. 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:
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Statistics: This is 1 of 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||
| Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
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| Revision history: |
This lists important revisions made to data for this record.
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