| MetSoc Home Publications Contacts |
|
||
|
||
| Northwest Africa 14596 | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic information | Name: Northwest Africa 14596 This is an OFFICIAL meteorite name. Abbreviation: NWA 14596 Observed fall: No Year found: 2014 Country: Morocco Mass:  104.2 g | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 86 approved meteorites classified as CK3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||||||||
| Comments: | Approved 29 Jan 2022 | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 111:
Northwest Africa 14596 (NWA 14596) Morocco Purchased: 2014 Classification: Carbonaceous chondrite (CK3) History: Sample was purchased from A. Aaronson at the Tucson Mineral Show in 2014 who acquired it from Morocco. Sample is catalogued at the Royal Ontario Museum as M58926. Physical characteristics: Small, flat specimen displaying 60% fusion crust cover, with one weathered, broken surface around much of the edge between fusion crust surfaces. CAIs are visible through fusion crust. Desert polish is moderately developed. Magnetic susceptibilty on a 9.82 g fragment is log χ (× 10-9 m3/kg) = 4.71. Petrography: Cut surfaces show a gray matrix bearing large chondrules and some CAIs. In thin section, chondrules (15 vol%), calcium aluminum-rich inclusions (15 vol%) and amoeboid olivine aggregates (5 vol%) all bear dark fine-grained rims, well spaced in a dark fragmental matrix. Chondrules of dominantly POP, BO types average 910±424 µm (n=24) diameter, and typically have igneous rims. Several round dark inclusions ranging from 150 to 800 µm are also present, bearing fine magnetite-rich rims. Olivine in chondrules and martix shows sharp to undulatory extinction. Olivine in the matrix appears pitted with cloudy cores. No metal is present. Spongy textured magnetite occurs as small grains, isolated spherical aggregates in matrix and as grains in rim material and inclusions within chondrules. Troilite appears on some chondrule rims and as blocky isolated grains in the matrix. In BSE images, chondrule olivine grains are typically zoned to Fe-rich rims. Geochemistry: EPMA: Olivine Fa20.76±11.91 (n=32); Chondrule olivine Fa17.95±12.06 (n=25); Matrix olivine Fa30.81±0.36 (n=7). Ca-poor pyroxene: Fs6.95±8.79En92.07±8.55Wo0.98±0.38 (n=14); Ca-rich pyroxene: Fs5.76±4.52En50.95±11.57Wo43.30±7.19 (n=15). Magnetite compositions: Cr2O3=2.50±0.22, TiO2=0.60±0.11, NiO=0.35±0.04, Al2O3=2.56±0.21 (n=20). Classification: CK3 (S2) Moderately Weathered. Chondrule olivine variability and matrix olivine equilibration as well as magnetite compositions all fit criteria of CK. Cr2O3 content between 2 and 3 wt% indicates CK3. Specimens: Type specimen: ROM. Main mass: D. Gregory | ||||||||||||||||||||||||||||||||
| Data from: MB111 Table 0 Line 0: |
|
||||||||||||||||||||||||||||||||
| Institutions and collections |
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011) Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010) DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address) |
||||||||||||||||||||||||||||||||
| Catalogs: |
| ||||||||||||||||||||||||||||||||
| References: | Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
| ||||||||||||||||||||||||||||||||
Geography:
|
Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||
| Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
| ||||||||||||||||||||||||||||||||
| Revision history: |
This lists important revisions made to data for this record.
| ||||||||||||||||||||||||||||||||