|
Northwest Africa 11292 | |||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 11292 This is an OFFICIAL meteorite name. Abbreviation: NWA 11292 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass: 146 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 407 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 28 Jun 2017 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 106:
Northwest Africa 11292 (NWA 11292) (Northwest Africa) Purchased: 2016 Classification: HED achondrite (Eucrite, polymict) History: One stone weighing 146 g was found and subsequently purchased from the finder in Agadir in 2016. Thomas Webb acquired the sample in 2016. Physical characteristics: Physical Characteristics: Sample is an irregular-shaped fragment that is ~35% covered by a black fusion crust. The fusion crust contains contraction cracks and a few small areas with relict flow lines. The interior is dark-grey and displays a clastic texture composed of lithic and mineral fragments. Petrography: Description and classification (A. Love, App): Sample is a breccia composed: of <=1 cm rounded to angular clasts with ophitic basaltic and cumulate textures with exsolved pyroxenes; vitrophyric textured melt clasts; brecciated clasts containing cumulate debris and 1mm clasts of exsolved pyroxenes that are crosscut by veins of fayalitic olivine (Fa84) and mineral fragments set within a fine-grained matrix of fragmental debris. Accessory minerals are Si polymorphs, ilmenite, FeS. Geochemistry: (A. Love, App) Low-Ca pyroxene Fs65.5±2.8Wo2.1±-0.7 (Fs60.8-70.8Wo1.3-4.0, FeO/MnO=30.5-35.1, N=21); Pigeonite host Fs61.2±2.3Wo8.1±1.4 (Fs58.2-64.6Wo5.4-9.9, Fe/Mn=30.0-31.8, N=6); high-Ca pyroxene exsolution lamellae Fs35.2±3.7Wo38.5±5.9 (Fs32.1-42.2Wo27.0-44.4, FeO/MnO=33.0-34.8, N=12); plagioclase An90.7±2.3Or0.3 (An88.5-93.0, N=7); Fayalitic veins Fa84.3±0.3, N=6. Classification: HED Achondrite (eucrite, polymict) Specimens: Thomas Webb holds the 123.3 g main mass. A 21.1 g type specimen and one polished thin section are on deposit at App. | ||||||||||||||||||||||||||||||
Data from: MB106 Table 0 Line 0: |
|
||||||||||||||||||||||||||||||
Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) TWebb: No contact information provided., United States (private address) |
||||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||||
References: | Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
| ||||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||||
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.
|