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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 565 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 Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1903 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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