Meteoritical Bulletin: Entry for Northwest Africa 13655

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Northwest Africa 13655

Basic information

Name: Northwest Africa 13655
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13655
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass: 499 g

Classification
history:

Recommended:

CV3 [explanation]

This is 1 of 553 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

Writeup

Writeup from MB 110:

Northwest Africa 13655 (NWA 13655)

(Northwest Africa)

Purchased: 2009 Jun 19

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 1.2 mm, some up to 2 mm. Type II chondrules are rare. Opaque minerals are magnetite, troilite, pentlandite.

Geochemistry: Mineral compositions and geochemistry: Random measurements of olivine grains revealed Fa_7.7±7.1(Fa_0.2-23.8); n=19. Random measurements of low-Ca pyroxene grains revealed Fs_1.9±0.7Wo_0.9±0.7(Fs_1.1-2.8Wo_0.1-2.5); 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:	Ensisheim, France
Date:	P 2009 Jun 19
Mass (g):	499
Pieces:	3
Class:	CV3
Shock stage:	C-S3
Weathering grade:	low
Fayalite (mol%):	7.7±7.1
Ferrosilite (mol%):	1.9±0.7
Wollastonite (mol%):	0.9±0.7
Classifier:	K. Metzler, IfP
Type spec mass (g):	20
Type spec location:	IfP
Main mass:	anonymous
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)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7655 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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