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Northwest Africa 13907 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13907 This is an OFFICIAL meteorite name. Abbreviation: NWA 13907 Observed fall: No Year found: 2021 Country: Algeria Mass: 158 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 83 approved meteorites classified as Lunar (anorth). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||
Comments: | Approved 6 May 2021 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 110:
Northwest Africa 13907 (NWA 13907) Algeria Purchased: 2021 Classification: Lunar meteorite (anorth) History: Purchased from Mostafa Hnini in January 2021. Reportedly found in Adrar, Algeria in 2020. Physical characteristics: Several identically appearing stones found together, no fusion crust, white exterior surface with some tan-colored desert caliche. Saw-cut surface reveals a fragmental breccia of white clasts with some light gray interstitial veins or fine-grained fragments. Petrography: (C. Agee, UNM) Microprobe examination reveals an anorthitic plagioclase host making up 90-95% of this meteorite. Poikiolitically enclosed in the plagioclase are sparse, small olivine and pyroxene grains (most in the size range 100-200 μm). Larger pyroxene grains are scarce with one larger grain in size range of 1 mm observed in the microprobe mount. Together, olivine and pyroxene make up a total of ~5% of this meteorite. Geochemistry: (C. Agee, UNM) Olivine Fa38.8±0.7, Fe/Mn=86±6, n=4; low-Ca pyroxene Fs30.8±0.1Wo2.9±0.1, Fe/Mn=55±4, n=4. Classification: Lunar ferroan anorthosite (FAN), brecciated. Olivine, pigeonite and plagioclase compositional values plot within the FAN suite field (after Warren, 1993). Specimens: 20 g on deposit at UNM, Matthew Stream holds the main mass. | ||||||||||||||||||||||||||||||
Data from: MB110 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., 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: |
Statistics: This is 1 of 1336 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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