|
Northwest Africa 12910 | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 12910 This is an OFFICIAL meteorite name. Abbreviation: NWA 12910 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass: 2.41 kg | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 520 approved meteorites classified as Diogenite. [show all] Search for other: Achondrites, Diogenites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 7 Nov 2019 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12910 (NWA 12910) (Northwest Africa) Purchased: 2019 Classification: HED achondrite (Diogenite) History: Purchased by Zuokai Ke from a Moroccan dealer in March 2019. Physical characteristics: Single stone, ~80% of the surface is covered with fresh black fusion crust. Exposed interior shows pale greenish pyroxene grains and a distinct, very planar, dark colored shock melt vein with numerous small parallel shock melt veins adjacent to it. Petrography: (C. Agee, UNM; X. Gu, CSU-China) This meteorite is an orthopyroxenite, containing ~98% orthopyroxene that is extremely homogeneous in composition. There is minor, ubiquitous troilite, chromite, silica, and augite. This meteorite has been subjected to high shock levels as many grains are fragmented, and some zones have cataclastic textures. A strikingly prominent shock melt vein crosscuts the entire sample, the composition of which is nearly identical to the host orthopyroxene indicating in-situ melting rather than injection from an exotic external source. Geochemistry: (C. Agee, UNM; X. Gu, CSU-China): Orthopyroxene Fs23.8±0.1Wo2.2±0.0, Fe/Mn=29±1, n=6; shock melt vein SiO2=55.2±0.4, TiO2=0.07±0.01, Al2O3=0.8±0.5, Cr2O3=0.5±0.2, MgO=26.2±0.4, FeO=15.5±0.5, MnO=0.51±0.01, CaO=1.2±0.3, all wt%, n=6. Classification: HED (diogenite) Specimens: 22.7 g including a probe mount on deposit at UNM, Zuokai Ke holds the main mass. | ||||||||||||||||||||||||||||
Data from: MB108 Table 0 Line 0: |
|
||||||||||||||||||||||||||||
Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) CSU: Department of Geosciences Colorado State University Fort Collins, CO 80523 , United States (institutional address; updated 21 Jan 2019) |
||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
| ||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 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.
|