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| Northwest Africa 15806 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 15806 This is an OFFICIAL meteorite name. Abbreviation: NWA 15806 Observed fall: No Year found: 2021 Country: Morocco Mass:  2.32 kg | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 343 approved meteorites classified as Lunar (feldsp. breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||
| Comments: | Approved 23 Apr 2023 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 112:
Northwest Africa 15806 (NWA 15806) Morocco Find: May 2021 Classification: Lunar meteorite (feldspathic breccia) History: The stone was found near Smara, Morocco. It was purchased from a dealer in Morocco. Physical characteristics: The stone (~15.0 × 15.0 × 10.0 cm) has a rugged surface with cm-sized vugs, dusted by desert soil, and no visible fusion crust. A cut surface exposes a fresh-looking interior. This polymict breccia includes a light grey matrix with numerous angular or more rounded white to light-gray lithic clasts. Petrography: (R. Zhao, A. Bouvier, UBayr) The type specimen polished section consists of lithic clasts and mineral fragments within a clastic to glassy matrix. Melt rock clasts are generally rounded in shape and dominated by felspathic (anorthitic), olivine-gabbro, troctolite and basalt lithologies. Mineral clasts vary in shape from angular to more rounded, and are dominated by anorthite, olivine, low-Ca pyroxene with exsolution lamellae, Ca-rich pyroxene, and minor ilmenite, chromite, Fe-S, Fe95.4Ni4.0Co0.3Cr0.3 metal. Geochemistry: In host matrix, olivine is heterogeneous with Fa20.5±4.8 (Fe/Mn=81±13; n=16), or Fa46.2±12.6 (Fe/Mn=92±10; n=7). Pyroxene is Fe-rich augite with Fs52.4±14.2Wo30.5±4.7 (Fe/Mn = 64±5, n=4), low-Fe augite with Fs13.0±6.0Wo41.4±1.4 (Fe/Mn = 39±8, n=5), and orthopyroxene with Fs23.8±10.5Wo3.1±0.3 (Fe/Mn = 51±5, n=4). One pyroxene grain of pigeonite Fs48.2±1.4Wo4.7±1.0 (Fe/Mn = 55±1, n=3) has up to μm-wide augite exsolution lamellae Fs30.6±4.4Wo28.6±7.1 (Fe/Mn = 54±4, n=4). An anorthositic clast contains anorthite An97.0±0.3 (Or = 0.1±0.1, n=10) with orthopyroxene inclusions Fs38.0±0.1Wo2.7±0.2 (Fe/Mn = 65±2, n=2). A clast of troctolite contains olivine Fa17.8±0.1 (Fe/Mn = 83±6, n=10) and anorthite An96.5±0.4 (Or= 0.1±0.1, n=9). Classification: Lunar (polymict fragmental breccia) Specimens: 22.9 g including a polished mount and a thin section at UBayr. 40 g were deposited with the Ministry of Mines in Morocco (catalogue # 106). Main mass with Achim and Moritz Karl. | ||||||||||||||||||||||||||||||
| Data from: MB112 Table 0 Line 0: |
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| Institutions and collections |
UBayr: Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany (institutional address; updated 5 Feb 2020) |
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| Catalogs: |
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| References: | Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
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Geography:
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Statistics: This is 1 of 2163 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||