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Northwest Africa 10915
Basic information Name: Northwest Africa 10915
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10915
Observed fall: No
Year found: 2015
Country: Morocco
Mass:help 19 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 238 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 26 Nov 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10915 (NWA 10915)

Morocco

Purchased: 2015

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by A. Jonikas from an unknown Moroccan dealer in early (March?) 2015, then sold to the owner by S. Arnold (of Chicago, Illinois) in October 2015. Likely recovered shortly before initial sale.

Physical characteristics: A single stone mostly covered in black fusion crust. Interior is chalky white. No weathering is evident.

Petrography: (C. Herd, UAb) A fragmental breccia consisting of clasts of very fine-grained (<100 μm) equigranular plagioclase and pyroxene set in a matrix with the same mineralogy. Some clasts are coarser-grained (<1 mm) and plagioclase-phyric. Texture throughout is granoblastic (abundant 120° junctions) and annealed. Pyroxene (high or low-Ca) are commonly exsolved. Accessory minerals are chromite, ilmenite, silica polymorph, and troilite.

Geochemistry: (C. Herd and S. Kampel, UAb) Low-Ca pyroxene Fs60.7±0.8Wo2.6±0.6 (n=25), high-Ca pyroxene Fs26.4±0.7Wo43.2±0.6 (n=19), plagioclase An88.7±2.4 (n=30), chromite (5-7 wt% TiO2).

Classification: Eucrite (granulitic monomict breccia)

Specimens: A 5.4 g specimen, including one thin section, is at UAb. Main mass is with the owner.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2015
Mass (g):19.0
Pieces:1
Class:Eucrite-mmict
Shock stage:low
Weathering grade:low
Classifier:C. Herd, UAb
Type spec mass (g):5.4
Type spec location:UAb
Main mass:John Shea
Comments:Submitted by C. Herd
Institutions
   and collections
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1505 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater)

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