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Northwest Africa 11764
Basic information Name: Northwest Africa 11764
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11764
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 113 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  CK5
Recommended:  CK5    [explanation]

This is 1 of 162 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 11 May 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11764 (NWA 11764)

(Northwest Africa)

Purchased: 2014

Classification: Carbonaceous chondrite (CK5)

History: The meteorite was purchased from a local meteorite dealer in Zagora, Morocco.

Physical characteristics: Dark greyish to greenish individual with some fusion crust.

Petrography: The meteorite is composed of recrystallized matrix predominantly composed of Fe-rich olivine with several scattered and clearly defined chondrules (mean diameter about 0.8 mm). Cr-rich magnetite is abundant. More minor phases include intermediate plagioclase, low-Ca pyroxene, and sulfides. Metal is virtually absent. Plagioclase grain size is about 100 μm.

Geochemistry: olivine: Fa33.4±0.3, n=16, FeO/MnO=133±9; low-Ca pyroxene:Fs26.8±0.2Wo0.8±0.1, n=9; feldspar: An54.9±3.1Ab42.9±2.8, n=3

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Zagora, Morocco
Date:P 2014
Mass (g):113
Pieces:1
Class:CK5
Shock stage:S2
Weathering grade:low
Fayalite (mol%):33.4±0.3 (n=16)
Ferrosilite (mol%):26.8±0.2 (n=9)
Wollastonite (mol%):0.8±0.1 (n=9)
Classifier:A. Greshake, MNB
Type spec mass (g):20.1
Type spec location:MNB
Main mass:Stefan Ralew
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7328 approved meteorites from (Northwest Africa) (plus 1973 unapproved names)

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