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| Northwest Africa 15513 | |||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 15513 This is an OFFICIAL meteorite name. Abbreviation: NWA 15513 Observed fall: No Year found: 2014 Country: Morocco Mass:  2.73 g | ||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 275 approved meteorites classified as Eucrite-mmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
| Comments: | Approved 7 Jan 2023 | ||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 112:
Northwest Africa 15513 (NWA 15513) Morocco Find: 2014 Classification: HED achondrite (Eucrite, monomict) 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 contains clasts with remnant basaltic textures (subophitic and variolitic) embedded in a recrystallized matrix. The boundaries between the clasts and the matrix are unclear. Plagioclase varies from 300 µm to 20 µm in size, and contains tiny inclusions of pyroxene and opaques. Pigeonite contains lamellae of augite up to 14 µm in thickness. Augite grains with exsolved pigeonite lamellae are also observed. Mesostasis domains in the basaltic clasts are abundant, and mostly consist of silica and ilmenite. The rock is crisscrossed by a network of ~80 µm wide glassy shock veins, which frequently contain rounded mineral fragments. Minor mineral phases include silica, chromite, ulvöspinel, ilmenite and troilite. Geochemistry: (T. Shisseh, R. Hewins, FSAC, MNHNP) Low-Ca pyroxene is En38±0.6Fs59.5±0.3Wo2.5±0.5 (Fe/Mn=32; Mg# =39; n=4). High-Ca pyroxene is En31±2.3Fs28±5.5Wo41±7.8 (n=3). Plagioclase is An82.5±4.5Ab16±3.2Or1.5±1.5 (n=3). Spinels (chromite and ulvöspinel) are Usp6.36±1.1Chr74.6±0.4 (n=2), and Usp46Chr42 (n=1). Classification: (T. Shisseh, R. Hewins, FSAC, MNHNP) Monomict eucrite. This meteorite contains anorthite, and pyroxene with Fe/Mn ratios matching those of eucrites, plus typical eucritic textures. | ||||||||||||||||||||||||||||
| 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) USP: Museu de Geociências - USP Rua do Lago, 562 CEP: 05508-080 Butantã - SP Brazil, Brazil; Website (institutional address; updated 22 Oct 2022) 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 2012 approved meteorites from Morocco (plus 35 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||