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Northwest Africa 13659
Basic information Name: Northwest Africa 13659
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13659
Observed fall: No
Year found: 2017
Country: Morocco
Mass:help 142.9 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 490 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 10 Jan 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13659 (NWA 13659)

Morocco

Find: 2017

Classification: HED achondrite (Eucrite)

History: Purchased in 2017 at the Tucson Gem Show by Matthew Stream from a seller in Morocco.

Physical characteristics: Single stone with weathered fusion crust.

Petrography: (D. Sheikh, FSU) Specimen is composed of randomly oriented, acicular calcic plagioclase laths (80±30µm), low-Ca pyroxene, pigeonite, high-Ca pyroxene, chromite (some containing up to 3.2 wt% TiO2), and SiO2-rich glass.

Geochemistry: Low-Ca Pyroxene (Fs60.1±5.1Wo3.1±0.9, range Fs51.8-67.9Wo2.1-4.4, FeO/MnO=28±2, n=7), Pigeonite (Fs47.8±9.7Wo13.0±5.7, range Fs34.2-73.6Wo6.4-22.3, FeO/MnO=27±3, n=30), High-Ca Pyroxene (Fs51.9±11.4Wo30.2±4.6, range Fs38.8-59.5Wo26.6-35.3, FeO/MnO=30±5, n=3), Calcic Plagioclase (An89.6±0.9, range An87.6-91.3, n=25).

Classification: Achondrite (eucrite)

Specimens: 20.2 g at UCLA; main mass with Matthew Stream.

Data from:
  MB110
  Table 0
  Line 0:
Date:2017
Mass (g):142.9
Pieces:1
Class:Eucrite
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):60.1±5.1, 47.8±9.7, 51.9±11.4
Wollastonite (mol%):3.1±0.9, 13.0±5.7, 30.2±4.6
Classifier:D. Sheikh, FSU
Type spec mass (g):20.2
Type spec location:UCLA
Main mass:Matthew Stream
Comments:Submitted by Daniel Sheikh
Institutions
   and collections		 UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1548 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater)

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