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Northwest Africa 11435
Basic information Name: Northwest Africa 11435
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11435
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 312 g
Meteoritical Bulletin:  MB 106  (2018)  CK5
Recommended:  CK5    [explanation]

This is 1 of 199 approved meteorites classified as CK5.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 13 Oct 2017
Writeup from MB 106:

Northwest Africa 11435 (NWA 11435)

(Northwest Africa)

Purchased: 2017 May

Classification: Carbonaceous chondrite (CK5)

Petrography: (K. Metzler, IfP) Chondrules with apparent diameters up to 1.3 mm and CAIs are embedded in a fine-grained brownish matrix. Opaques are Cr-bearing magnetite and pentlandite. No metal was found .

Geochemistry: Mineral compositions and geochemistry: Olivine composition Fa31.7±0.2 (31.5-32.2; n=15). Composition of low-Ca pyroxene Fs26.2±0.5 (25.4-27.5); Wo0.8±0.3 (0.5-1.6; n=15). Composition of Ca-rich pyroxene Fs9.9; Wo45.7 (n=2).The compositional range of feldspar (n=2) is An38-40. One plagioclase grain in a CAI shows An86. Most abundant opaques are Magnetite and Pentlandite. No metal was found. Magnetite shows significant concentrations of elements other than Fe (n=4): MgO 0.4 wt%; Al2O3 1.9 wt%; Cr2O3 5.4 wt%.

Classification: CK chondrite based on mineral chemistry. Petrologic type 5 based on the equilibrated state of olivine and pyroxene and clear visibility of chondrules.

Data from:
  Table 0
  Line 0:
Place of purchase:Boujdour, Morocco
Date:P 2017 May
Mass (g):312
Shock stage:S2
Weathering grade:low
Fayalite (mol%):31.7
Ferrosilite (mol%):26.2; 9.9
Wollastonite (mol%):0.8; 45.7
Classifier:K. Metzler, IfP
Type spec mass (g):21
Type spec location:IfP
Main mass:Nourddine Azelmat, Morocco
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 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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