|
Northwest Africa 12944 | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 12944 This is an OFFICIAL meteorite name. Abbreviation: NWA 12944 Observed fall: No Year found: 2006 Country: Morocco Mass: 6.2 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 598 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 2 May 2020 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 12944 (NWA 12944) Morocco Purchased: 2006 Classification: HED achondrite (Eucrite) History: Purchased from A. Habibi in 2006 at the Tucson Gem and Mineral Show, who provided origin of sample as being from Morocco. Catalogued at the Royal Ontario Museum collection as sample LM59807 Physical characteristics: Visible fusion crust exhibiting low to moderate weathering, evident by a light beige coloring. Cracks in the fusion crust filled in with caliche. Interior of the sample is intact, uniform and pale grey with a fine-grained texture. Petrography: The thin section of this small specimen, largest dimensions are 1.5 by 1.0 cm, is dominated by 4 clasts with a gabbroic texture. The pyroxenes are mostly lath-shaped although a few more equant grains are present. Plagioclase is difficult to observe and appears to have been maskelynized. The clasts are separated by a very fine grained to glassy comminuted matrix with some isolated crystal fragments. The entire specimen, clasts and matrix, are shock darkened and the pyroxene lathes show radial extinction. Geochemistry: Mineral composition and geochemistry: Plagioclase composition: An82.2±5.06Or0.24±0.15 (n=19). Low Ca-pyroxene composition: Fs33.68±0.64Wo8.39±2.85 and FeO/MnO = 32.72±0.57 (n =7). High Ca-pyroxene composition: Fs30.43±1.15Wo30.60±7.63 and FeO/MnO = 32.71±1.08 (n=16). Classification: (K. Tait, ROM) Texture and compositions suggest the sample is a polymict eucrite breccia. | ||||||||||||||||||||||||||||
Data from: MB109 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) |
||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
| ||||||||||||||||||||||||||||
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.
|