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Northwest Africa 12396
Basic information Name: Northwest Africa 12396
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12396
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 11.3 g
Meteoritical Bulletin:  MB 108  (2020)  Mesosiderite
Recommended:  Mesosiderite    [explanation]

This is 1 of 273 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 27 Mar 2019
Writeup from MB 108:

Northwest Africa 12396 (NWA 12396)

(Northwest Africa)

Purchased: 2015

Classification: Mesosiderite

Physical characteristics: 2.5 × 1.5 × 2.0 cm in size. Sample is irregular in shape with preserved fusion crust.

Petrography: Composed mainly of Opx and Plg. Opx ranges from 30 to 1480 μm. Plg ranges in size from 30 to 170 μm. FeNi metal ranges from 15 to 1050 μm and sulfides from 30 μm to 350 μm. Opaques comprise approximately 20% of sample. Weakly shocked: plagioclase displays minor undulose extinction and no melt veins or melt pockets are visible. Moderately weathered: Fe Oxide veining common.

Geochemistry: Low Ca pyroxene: Fs30.2±0.3Wo3.0±0.6, FeO/MnO=27.7±0.8 n=48; feldspar: An91.3±2.1Ab8.4±2.0 n=13. Oxygen isotopes (Ziegler, UNM): δ17O = 1.689±0.23, δ18O = 3.745±0.42, Δ17O = -0.289±0.01 per mil (n=3)

Classification: Mesosiderite

Specimens: Catalogued at the ROM as LM57787

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson Gem and Mineral Show
Date:P 2015
Mass (g):11.26
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):30.20± 0.34
Wollastonite (mol%):3.00± 0.62
Classifier:V. Di Cecco, ROM
Type spec mass (g):2.51
Type spec location:ROM
Main mass:DGregory
Comments:Submitted by V. Di Cecco (ROM)
Plots: O isotopes:  
   and collections
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address)
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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     This is 1 of 9689 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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