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Northwest Africa 13967
Basic information Name: Northwest Africa 13967
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13967
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 252 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 288 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 17 Jul 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13967 (NWA 13967)

(Northwest Africa)

Find: 2015

Classification: Lunar meteorite (feldspathic breccia)

History: Acquired by Jay Piatek in May 2015 from a Moroccan meteorite dealer.

Physical characteristics: (L. Garvie, ASU) A single irregular, sandblasted stone weighing 251.8 g. No fusion crust is visible. White clasts to 1.5 cm are visible at the surface. In a polished 7 × 3 cm section, gray, tan, and other lightly colored clasts vary in shape from angular to rounded with a maximum size of 1.5 centimeters. The dark matrix is locally vesicular. In a hand sample, there are visible carbonate veins, possibly as a result of terrestrial alternation.

Petrography: (T. Geraci, C. Kroemer, A. Wittmann, ASU) Polymict, angular to sub-rounded feldspathic clasts set in a glassy, vesicular groundmass. Clasts include medium-grained anorthosite, fine-to-medium grained granulite, one ferroan SiO2- and ilmenite-bearing melt, glassy and crystallized impact melts, including spherule fragments. The most common minerals are anorthite, magnesian olivine, and pyroxene; tissintite and corundum occur as components of the glassy groundmass. Less common minerals include SiO2, chromite, troilite, Fe-Ni metal, ilmenite, ZrO2, and zircon. Fractures are primarily filled by calcium carbonate and sometimes strontium-bearing barite, but mafic minerals and metal clasts are commonly not altered or oxidized.

Geochemistry: (T. Geraci, C. Kroemer, A. Wittmann, ASU) Olivine Fa19.1±6.9, range Fa5.3-27.4 (n=79), Low-Ca Pyroxene Fs28.2±14.2Wo4.3±3.0 (n=57), range Fs10.3-62.5Wo2.3-16.5. High-Ca Pyroxene Fs20.1±11.1Wo40.7±4.5, range Fs2.4-41.2Wo28.3-48.3 (n=31). Plagioclase An95.7±1.3Ab4.1±1.1Or0.2±0.1, range An90.2-97.6Ab2.3-9.5Or0.0-0.4 (n=63). Glass (wt% Mg/Al=0.24-0.53, avg. 0.32±0.05 (n=18). Kamacite 7.1±0.1 wt% Ni (range 7.0-7.2 wt%), 0.36 wt% Co (range 0.330.37 wt%). Martensite 10.9±4.1 wt% Ni, range 8.2-18.9 wt% Ni, 10.87±4.01 wt% Co, range 0.42-1.44 wt% Co.

Classification: Achondrite (lunar feldspathic breccia). Shock-lithified.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Online
Date:2015
Mass (g):251.8
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:medium
Weathering grade:low
Fayalite (mol%):19.1±6.9 (n=79)
Classifier:T. Geraci, C. Kroemer, A. Wittmann, L. Garvie, ASU
Type spec mass (g):34
Type spec location:ASU
Main mass:Jay Piatek
Comments:ASU#2153; submitted by L. Garvie
Institutions
   and collections
ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012)
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: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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