Meteoritical Bulletin: Entry for Northwest Africa 4694

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Northwest Africa 4694

Basic information

Name: Northwest Africa 4694
This is an OFFICIAL meteorite name.
Abbreviation: NWA 4694
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass: 670 g

Classification
history:

Recommended:

CVred3 [explanation]

This is 1 of 16 approved meteorites classified as CVred3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites

Comments:

Approved 11 Dec 2021

Writeup

Writeup from MB 110:

Northwest Africa 4694 (NWA 4694)

(Northwest Africa)

Purchased: 2007

Classification: Carbonaceous chondrite (CVred3)

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

Physical characteristics: Dark brownish rock without fusion crust.

Petrography: Carbonaceous chondrite composed of sharply defined chondrules (mean diameter about 900 µm), CAIs (up to 4 mm), and olivine amoeboids all set into a fine-grained dark brownish matrix. Opaque phases are metal and sulfides. Most chondrules show reddish staining due to terrestrial weathering.

Geochemistry: Ni in sulfides <0.12 wt%, N=5

Classification: Carbonaceous chondrite (CVred3). Reduced subgroup based on low concentrations of Ni in sulfides, Gattacceca et al. (2020).

Bibliography:

Gattacceca J.,Bonal L.,Sonzognia C., and Longereya J. (2020) CV chondrites: More than one parent body. Earth Planet. Sci. Letts. 547, 116467. (link)

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2007
Mass (g):	670
Pieces:	1
Class:	CVred3
Shock stage:	S2
Weathering grade:	high
Fayalite (mol%):	8.4±9.3 (0.3-36.2, n=21)
Ferrosilite (mol%):	1.2±0.2 (1.0-1.5, n=16)
Wollastonite (mol%):	0.9±0.2 (0.6-1.2, n=16)
Classifier:	A. Greshake, MNB
Type spec mass (g):	20
Type spec location:	MNB
Main mass:	Hanno Strufe
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 110, in preparation (2021)

Find references in NASA ADS:
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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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