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Northwest Africa 11436
Basic information Name: Northwest Africa 11436
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11436
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 1037 g
Meteoritical Bulletin:  MB 106  (2018)  R3-6
Recommended:  R3-6    [explanation]

This is 1 of 20 approved meteorites classified as R3-6.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 13 Oct 2017
Writeup from MB 106:

Northwest Africa 11436 (NWA 11436)

(Northwest Africa)

Purchased: 2017 July

Classification: Rumuruti chondrite (R3-6)

Petrography: (K. Metzler, IfP) Chondritic breccia, consisting of light and dark chondritic clasts, embedded in a matrix of isolated chondrules and chondritic debris. Most dark clasts represent chondritic lithologies of type 3, but some shock-darkened chondritic clasts also occur. Light clasts are strongly metamorphosed and belong to the petrologic type 6.

Geochemistry: Mineral compositions and geochemistry: Clasts of petrologic type 3: mean olivine composition Fa25.5±15.3 (0.4-50.0); n=20; mean low-Ca pyroxene composition Fs7.4±5.5 (1.1-17.8), Wo1.1±0.9 (0.1-3.4), n=15. Clasts of petrologic type 6: mean olivine composition Fa38.9±0.5 (38.0-39.7); n=11; mean pyroxene composition Fs11.7±0.5 (10.9-12.4), Wo44.4±0.7 (43.4-45.6), n=9. Accessories are pentlandite and chromite; no metal was found.

Classification: R chondrite based on mineral chemistry. Genomict breccia, consisting of clasts of petrologic type 3 (unequilibrated olivine and pyroxene) and type 6 (equilibrated olivine and pyroxene; plagioclase grains >50 µm)

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2017 July
Mass (g):1037
Shock stage:S3
Weathering grade:low
Fayalite (mol%):25.5; 38.9
Ferrosilite (mol%):7.4; 11.7
Wollastonite (mol%):1.1; 44.4
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Mirko Graul, Bernau, Germany
Comments:Submitted by K. Metzler, IfP
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
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 7101 approved meteorites from (Northwest Africa) (plus 2004 unapproved names)

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