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Northwest Africa 11586
Basic information Name: Northwest Africa 11586
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11586
Observed fall: No
Year found: 2016
Country: Algeria
Mass:help 91.5 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 405 approved meteorites classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 3 Feb 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11586 (NWA 11586)

Algeria

Purchased: 2016 May

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Meteorite has residual visible black fusion crust and weak magnetic properties. Additionally, hand specimen is unbrecciated.

Petrography (B. Miao, C. Zhang, GUT): This meteorite, with weak magnetic properties and residual visible black fusion crust, whose rock structure is dense and section is full of small metal (Fe). Within polished thin section, mineral is slightly broken, rock structure is igneous but not brecciated. The mineral modal abundance is as follows: Low-Ca pyroxene (36.2 vol%), high-Ca pyroxene (10.6 vol%), plagioclase (44.3 vol%), SiO2 (6.1 vol%), metal-Fe (0.3 vol%), chromite (0.6 vol%), other minerals such as ilmenite, troilite, apatite and zircon (1.9 vol%).

Geochemistry (B. Miao, C. Zhang, GUT, EPMA): Low-Ca pyroxene: Fe/Mn=27.5 Mg#=39.4;Fs57.8Wo4.7En37.5(n=50). High-Ca pyroxene: Fe/Mn=26.5 Mg#=51.8;Fs28.2Wo41.5En30.3(n=60). Plagioclase: An90.9Or0.5Ab8.62(n=29).

Classification: Basaltic unbrecciated eucrite

Specimens: 21.8 g specimen and a polished thin section are deposited in GUT

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016 May
Mass (g):91.5
Pieces:1
Class:Eucrite
Classifier:B. Miao, C. Zhang, GUT
Type spec mass (g):21.8
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. 107, in preparation (2018)
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Photos:
CreditPhotos
Public domain photographs:
Zhipeng Xia            
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 772 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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