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Northwest Africa 12278
Basic information Name: Northwest Africa 12278
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12278
Observed fall: No
Year found: 2016
Country: Algeria
Mass:help 511 g
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 12278 (NWA 12278)

Algeria

Purchased: 2016 5

Classification: HED achondrite (Eucrite, unbrecciated)

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

Physical characteristics: The hand specimen is unbrecciated and its surface is covered with black fusion crust. In addition, the meteorite has weak magnetic properties (i.e., a magnet is weakly attracted to the meteorite).

Petrography (B. Miao, Chuantong Zhang, GUT): The structure of this meteorite is dense, igneous and unbrecciated. Many types of minerals were observed in this meteorite, such as Low-Ca pyroxene, high-Ca pyroxene, plagioclase, SiO2, Fe-metale, chromite, ilmenite, troilite, rutile and baddeleyite.

Geochemistry (Bing-kui Miao, Chuantong Zhang, GUT, EPMA): Low-Ca pyroxene (n=15): Fe/Mn=30.0±1.8, Mg#=37.3±0.9;Fs60.2±2.0Wo4.0±2.0En35.8±0.6. High-Ca pyroxene (n=11): Fe/Mn=30.2±1.7, Mg#=50.5±1.3; Fs29.4±1.3Wo40.6±1.2En30.0±0.3. Plagioclase(n=20): An90.1±0.5Or0.5±0.2Ab9.4±0.4.

Classification: Based on texture, mineral composition, it is a basaltic unbrecciated eucrite.

Specimens: 29.2 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):511.26
Pieces:1
Class:Eucrite-unbr
Classifier:B. Miao, C. Zhang, GUT
Type spec mass (g):29.2
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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