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Northwest Africa 14136
Basic information Name: Northwest Africa 14136
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14136
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 3.7 kg
Recommended:  Diogenite-olivine    [explanation]

This is 1 of 21 approved meteorites classified as Diogenite-olivine.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 23 Aug 2021
Writeup from MB 110:

Northwest Africa 14136 (NWA 14136)

(Northwest Africa)

Purchased: 2021

Classification: HED achondrite (Diogenite, olivine)

History: Purchased by Jay Piatek in 2021 from a Moroccan meteorite dealer.

Physical characteristics: Single stone mostly covered in black fusion crust, with some slightly weathered patches of exposed interior. Fresh broken surfaces of the deposit sample show a significantly brecciated interior of primarily coarse, pale-green pyroxene grains. A few scattered dark oxide grains are also visible.

Petrography: (A. Ross and C. Agee, UNM) Backscattered electron images shown that pyroxene is the dominant mineral in this meteorite (orthopyroxenite). The pyroxenes are very uniform in composition (no zoning observed). Olivine is scattered throughout and makes up approximately 10% of the mineralogy. Olivines are also uniform in chemical composition. A single plagioclase grain (100 × 20 μm) was observed as an inclusion in a larger olivine grain. Chromite grains up to 1 mm are present. Trace amounts of troilite, Fe-metal, and augite were also detected.

Geochemistry: (A. Ross and C. Agee, UNM) Olivine Fa28.6±0.2, Fe/Mn=48±2, n=8; low-Ca pyroxene Fs24.3±0.6Wo2.9±1.0, Fe/Mn=30±2, n=8; plagioclase An85.9.

Classification: Diogenite (olivine-bearing)

Specimens: 41 g including a probe mount on deposit at UNM, Jay Piatek holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021
Mass (g):3700
Shock stage:high
Weathering grade:low
Fayalite (mol%):28.6±0.2
Ferrosilite (mol%):24.3±0.6
Wollastonite (mol%):2.9±1.0
Classifier:C. Agee, UNM
Type spec mass (g):41
Type spec location:UNM
Main mass:Jay Piatek
Comments:Submitted by C. Agee
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
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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     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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