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Northwest Africa 12274
Basic information Name: Northwest Africa 12274
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12274
Observed fall: No
Year found: 2016
Country: Algeria
Mass:help 5.27 kg
Classification
  history:
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 92 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 12 Apr 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12274 (NWA 12274)

Algeria

Purchased: 2016 5

Classification: HED achondrite (Eucrite, unbrecciated)

History: Purchased by Miao Bing-an in 2016 from Morocco.

Physical characteristics: A black fusion crust is visible on the surface of the meteorite, and some of the fusion crust is covered by yellow-brown soil. In addition, the hand specimen is unbrecciated and has weak magnetic properties (i.e., a magnet is weakly attracted to the meteorite).

Petrography (B. Miao, C. Zhang, GUT): The rock structure is igneous but not brecciated. Many types of minerals were found in this meteorite, such as Low-Ca pyroxene, high-Ca pyroxene, plagioclase, SiO2, metal-Fe, chromite, ilmenite, troilite, rutile and baddeleyite.

Geochemistry (B. Miao, C. Zhang, GUT, EPMA): Low-Ca pyroxene (n=13): Fe/Mn=31.2±1.95, Mg#=36.8±1.0; Fs60.7±1.7Wo3.9±1.9En35.4±1.0. High-Ca pyroxene (n=12): Fe/Mn=30.7±3.0, Mg#=49.8±1.3; Fs29.6±1.3Wo41.1±1.3En29.3±0.6. Plagioclase (n=20): An90.0±0.5Or0.5±0.2Ab9.5±0.5.

Classification: Based on texture and mineral composition, this meteorite is a basaltic unbrecciated eucrite.

Specimens: 32.6 g specimen and a polished thin section are deposited in GUT

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016 5
Mass (g):5270.00
Pieces:1
Class:Eucrite-unbr
Classifier:B. Miao, C. Zhang, GUT
Type spec mass (g):32.6
Type spec location:GUT
Main mass:GUT
Comments:Submitted by Bing-kui Miao
Institutions
   and collections
GUT: College of Earth Sciences, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China (institutional address; updated 18 Oct 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
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Photos:
CreditPhotos
Public domain photographs:
Miao Bingkui            
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 970 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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