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| Northwest Africa 15517 | |||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 15517 This is an OFFICIAL meteorite name. Abbreviation: NWA 15517 Observed fall: No Year found: 2015 Country: Morocco Mass:  4.6 g | ||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 55 approved meteorites classified as Eucrite-cm. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
| Comments: | Approved 29 Jan 2023 | ||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 112:
Northwest Africa 15517 (NWA 15517) Morocco Find: 2015 Classification: HED achondrite (Eucrite, cumulate) History: This meteorite was purchased by Luc Labenne in Erfoud, Morocco, from an anonymous Moroccan dealer. Petrography: (T. Shisseh, R. Hewins, B. Zanda, E. Jacquet, H. Chennaoui Aoudjehane, S. Pont, FSAC, MNHNP) This rock exhibits a cumulate texture, and predominately consists of pyroxene (>70 % vol) and plagioclase, with minor amount of chromite. Pyroxene is up to 5 mm in size, and contains rare augite lamellae up to 15 µm in width. Plagioclase is partly maskelynized, and contains vesicles up to 500 µm in diameter. In most cases, these maskelynized plagioclase areas are surrounded by radial cracks in pyroxene. Shock veins are observed, and consist of entrained fragments of pyroxene and schlieren of melted plagioclase in a groundmass of glass and devitrified glass. Chromite occurs between pyroxene and plagioclase boundaries, or as tiny inclusions in both phases. Geochemistry: (T. Shisseh, R. Hewins, FSAC, MNHNP) Low-Ca pyroxene En59±1.4Fs36.5±1.5Wo4.5±2.9 (Fe/Mn=29±1; Mg# =62; n=4). Plagioclase An92±0.5Or0.10±0.1 (n=3). Chromite ~51 wt % Cr2O3. Classification: (T. Shisseh, R. Hewins, FSAC, MNHNP) Cumulate eucrite. | ||||||||||||||||||||||||||||
| Data from: MB112 Table 0 Line 0: |
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| Institutions and collections |
MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address) FSAC: Universite Hassan II Casablanca, Faculte des Sciences Ain Chock, Departement de Géologie, BP 5366 Maârif, Casablanca, Morocco (institutional address; updated 9 Jan 2013) Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012) |
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| References: | Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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Geography:
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Statistics: This is 1 of 1967 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||