| MetSoc Home Publications Contacts |
|
||
|
||
| Northwest Africa 15516 | |||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic information | Name: Northwest Africa 15516 This is an OFFICIAL meteorite name. Abbreviation: NWA 15516 Observed fall: No Year found: 2015 Country: Morocco Mass:  330 g | ||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 293 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 15516 (NWA 15516) Morocco Find: 2015 Classification: HED achondrite (Eucrite, monomict) History: This meteorite was purchased by Luc Labenne in Laâyoune, Morocco, from an anonymous Moroccan dealer. Physical characteristics: (T. Shisseh, R. Hewins, FSAC, MNHNP) This rock is composed of coarse-grained clasts and mineral fragments, set in a grey and white groundmass. Petrography: (T. Shisseh, R. Hewins, B. Zanda, E. Jacquet, H. Chennaoui Aoudjehane, S. Pont, FSAC, MNHNP) Scanning electron microcopy examination of three polished sections of this sample reveals a brecciated texture. The rock contains equal amount of pyroxene and plagioclase. Pyroxene is mainly pigeonite with exsolved lamellae of augite up to 45 µm in width. Faulting and displacement of these lamellae are frequently observed. Plagioclase is up to 4 mm in size, and is strongly fractured. Rare rods of oxides are crossing pyroxene. Silica grains are up to in size. spinels (chromite/ulvöspinel) and ilmenite are found. Geochemistry: (T. Shisseh, R. Hewins, FSAC, MNHNP) Low-Ca pyroxene is En51±0.78Fs47±0.7Wo2±1.4 (Fe/Mn=32.5; Mg# =52; n=4). Exsolution lamellae of augite are En38±0.3Fs19±0.3Wo43±0.4 (n=3). Plagioclase is An82-92) (n=8). The TiO2 and FeO contents in ilmenite range from 45 to 52 wt% and 41 to 44 wt%, respectively (n=2). Classification: (T. Shisseh, R. Hewins, FSAC, MNHNP) Monomict cumulate eucrite. | ||||||||||||||||||||||||||||
| Data from: MB112 Table 0 Line 0: |
|
||||||||||||||||||||||||||||
| 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) |
||||||||||||||||||||||||||||
| Catalogs: |
| ||||||||||||||||||||||||||||
| 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. ?
| ||||||||||||||||||||||||||||
| Photos: |
| ||||||||||||||||||||||||||||
Geography:
|
Statistics: This is 1 of 2163 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||