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Northwest Africa 13656
Basic information Name: Northwest Africa 13656
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13656
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 811 g
Classification
  history:
Recommended:  CV3    [explanation]

This is 1 of 557 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 16 Jan 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13656 (NWA 13656)

(Northwest Africa)

Purchased: 2020 Sep

Classification: Carbonaceous chondrite (CV3)

Petrography: (K. Metzler, IfP) Chondrules, CAIs and AOAs are embedded in a fine-grained dark matrix (about 40 vol% matrix). Most chondrules have apparent diameters between 0.3 and 1.5 mm, some up to 3 mm. Type II chondrules are rare. Opaque minerals are magnetite, pentlandite and traces of Ni-rich metal (Fe30Ni70).

Geochemistry: Mineral compositions and geochemistry: Random measurements of olivine grains revealed Fa8.4±12.6 (Fa0.3-36.3); n=16. Random measurements of low-Ca pyroxene grains revealed Fs1.3±0.6Wo2.2±1.5 (Fs0.6-2.5Wo0.9-4.3); n=12.

Classification: CV chondrite based on CAI and AOA occurrence, size of chondrules and CAIs, chondrule-matrix ratio, and mineral chemistry. Petrologic type 3 based on the chemical variation of olivine and pyroxene.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020 Sep
Mass (g):811
Pieces:4
Class:CV3
Shock stage:C-S1
Weathering grade:low
Fayalite (mol%):8.4±12.6
Ferrosilite (mol%):1.3±0.6
Wollastonite (mol%):2.2±1.5
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
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7810 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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