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Northwest Africa 12275
Basic information Name: Northwest Africa 12275
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12275
Observed fall: No
Year found: 2016
Country: Algeria
Mass:help 2.44 kg
Classification
  history:
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 89 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 12275 (NWA 12275)

Algeria

Purchased: 2016 5

Classification: HED achondrite (Eucrite, unbrecciated)

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

Physical characteristics: Meteorite has visible black fusion crust and weak magnetic properties (i.e., a magnet is weakly attracted to the meteorite). Additionally, hand specimen is unbrecciated.

Petrography (B. Miao, C. Zhang, GUT): The structure is dense and with abundant small Fe metal grains. The structure is igneous and unbrecciated. Many minerals such as Low-Ca pyroxene, high-Ca pyroxene, plagioclase, SiO2, metal-Fe, chromite, ilmenite, troilite, zircon, rutile and baddeleyite were found in this meteorite.

Geochemistry (B. Miao, C. Zhang, GUT, EPMA): Low-Ca pyroxene (n=13): Fe/Mn=29.7±1.5, Mg#=36.8±0.8; Fs61.5±1.5Wo2.7±1.3En35.8±0.5. High-Ca pyroxene (n=12): Fe/Mn=29.4±2.6, Mg#=50.9±1.2;Fs28.8±1.2Wo41.5±1.1En29.7±0.4. Plagioclase (n=20): An90.1±0.7Or0.4±0.2Ab9.5±0.7.

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

Specimens: 43.3 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):2440.00
Pieces:1
Class:Eucrite-unbr
Classifier:B. Miao, C. Zhang, GUT
Type spec mass (g):43.3
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 958 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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