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Northwest Africa 11290
Basic information Name: Northwest Africa 11290
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11290
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 65.3 g
Meteoritical Bulletin:  MB 106  (2018)  Pallasite, PMG
Recommended:  Pallasite, PMG    [explanation]

This is 1 of 57 approved meteorites (plus 1 unapproved name) classified as Pallasite, PMG.   [show all]
Search for other: Main group pallasites, Metal-rich meteorites, and Pallasites
Comments: Approved 28 Jun 2017
Writeup from MB 106:

Northwest Africa 11290 (NWA 11290)

(Northwest Africa)

Purchased: 2013

Classification: Pallasite (Main group)

History: The finder sold the meteorite to Brahim Tahiri in Erfoud. The meteorite was then acquired by Sean Tutorow.

Physical characteristics: The hand specimen is made of fresh Fe-Ni metal enclosing cm-sized olivine crystals.

Petrography: Olivine, as well as pyroxene, chromite, and iron-rich sulfide were identified by EDS within the polished mount.

Geochemistry: Mineral composition and geochemistry: Pyroxenes: opx Fs17.9±0.5Wo1.1±0.4 (N=2); low-Ca Fs12.7Wo23.8 (N=1); high-Ca: Fs6.4±0.5Wo 45.6±1.4 (N=5). Olivine Fa20.9±0.1 and Fe/Mn = 53.4±8.5 (N=8). Metal elemental analysis by quadrupole ICPMS (UWO), using the North Chile (Filomena) iron meteorite as an external standard: in mg/g Co = 3.7; Ni = 140.9, and in ppm: Cr = 2.0, Cu = 283, Ga = 26.3, Ge = 9.1, As = 18.1, Ru = 1.9, Rh = 1.1, Pd = 6.9, Ir = 0.21, Pt = 1.7, and Au = 2.7.

Classification: Pallasite, main group.

Specimens: 15.2g including a polished section at UWO. Remaining mass with Sean Tutorow.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2013
Mass (g):65.3
Class:Pallasite, PMG
Shock stage:low
Weathering grade:low
Fayalite (mol%):20.9±0.1 (N=12)
Ferrosilite (mol%):17.9±0.5 (N=2); 12.7 (N=1); 6.4±0.5 (N=5)
Wollastonite (mol%):1.1±0.4 (N=2); 23.8 (N=1); 45.6±1.4 (N=5)
Classifier:A. Bouvier, UWO
Type spec mass (g):15.2
Type spec location:UWO
Main mass:S. Tutorow
Comments:Field name G681.; submitted by A. Bouvier (UWO)
   and collections
UWO: University of Western Ontario, Department of Earth Sciences, BGS 1026, 1151 Richmond St. N, London, Ontario, Canada N6A 5B7, Canada (institutional address; updated 18 Jul 2015)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 9370 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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