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Nagjir 003 | |||||||||||||||||||||||||||||||||||||
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Basic information | Name: Nagjir 003 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2022 Country: Western Sahara Mass: 198 g | ||||||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 406 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||||||||
Comments: | Approved 20 Jun 2022 | ||||||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 111:
Nagjir 003 23°44’41’’N, 14°14’48’’W Rio de Oro, Western Sahara Purchased: 2022 Feb Classification: HED achondrite (Eucrite, polymict) History: Found in Western Sahara in December 2021 Petrography: (K. Metzler, IfP) Fine-grained polymict breccia, consisting of mm-sized basalt clast and mineral fragments (pyroxene, plagioclase) set in a fine-grained matrix of related debris. The mostly clastic matrix is intermingled with mm-sized subrounded domains of crystallized melt. Most pyroxenes exhibit augite exsolution lamellae. Several Fe-rich olivine fragments were found. Accessories are a silica polymorph, ilmenite, chromite, troilite, and Ni-free metallic iron. Geochemistry: Mineral compositions and geochemistry: Basalt clast: Low-Ca pyroxene (host): Fs61.3±0.8 Wo2.3±0.4 (Fs60.1-62.7 Wo1.8-3.1); mean Fe/Mn (at.): 30.1; n=10. Ca-rich pyroxene (exsolution lamellae) Fs27.1±0.3Wo42.3±0.5 (Fs26.4-27.6Wo41.7-43.2); n=10. Plagioclase An89.7±0.7Or0.2±0.2 (An88.6-90.6Or0.0-0.6); n=10. Fine-grained matrix: Low-Ca pyroxene (host): Fs66.0±4.2 Wo2.6±0.8 (Fs57.7-69.1Wo1.9-4.4); mean Fe/Mn (at.): 30.8; n=10. Ca-rich pyroxene (exsolution lamellae) Fs30.8±2.4Wo42.5±0.9 (Fs26.4-33.5Wo41.2-44.1); n=10. Plagioclase An89.6±2.4 Or0.1±0.2 (An86.1-93.0 Or0.0-0.7); n=10. Olivine: Fa76.8±4.9 (Fa68.2-81.9); mean Fe/Mn (at.): 45.7; n=8. Classification: Polymict eucrite, based on large variations of matrix mineral chemistry, compared to the restricted variations in the investigated basalt clast. | ||||||||||||||||||||||||||||||||||||
Data from: MB111 Table 0 Line 0: |
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Institutions and collections |
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012) |
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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 50 approved meteorites from Rio de Oro, Western Sahara This is 1 of 275 approved meteorites from Western Sahara (plus 20 unapproved names) | ||||||||||||||||||||||||||||||||||||
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Revision history: |
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