Meteoritical Bulletin: Entry for Northwest Africa 7210

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Northwest Africa 7210

Basic information

Name: Northwest Africa 7210
This is an OFFICIAL meteorite name.
Abbreviation: NWA 7210
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass: 24 g

Classification
history:

Meteoritical Bulletin:	MB 100	(2012)	CM2
Recommended:			CM2 [explanation]

This is 1 of 641 approved meteorites classified as CM2. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites

Comments:

Approved 14 Apr 2012

Writeup

Writeup from MB 100:

Northwest Africa 7210 (NWA 7210)

(Northwest Africa)

Purchased: Jan 2006

Classification: Carbonaceous chondrite (CM2)

History: Pieces were found in a 30 cm-diameter area, south of Erfoud, Morocco, in January, 2006.

Physical characteristics: Medium dark gray, sparse fusion crust. Many chondrules and some CAIs are visible.

Petrography: (K. Armstrong, A. Ruzicka, Cascadia): Contains ~19 area% chondrules (diameter 0.21±0.12 mm), ~1% metal, AOAs, and sparse CAIs. Extensive replacement of chondrule mesostasis but <10% of the metal is replaced with secondary phases.

Geochemistry: Olivine Fa_0.12-26.43and is predominantly forsteritic (Fa mean 0.51±0.89, median 0.19, N=13).

Classification: Carbonaceous chondrite (CM2)

Specimens: 5.0 g and two polished thin sections are on deposit at Cascadia. Mr. Keith Dickson holds the main mass.

Data from:
  MB100
  Table 1
  Line 1681:

Place of purchase:	Midelt, Morocco
Date:	P Jan 2006
Mass (g):	24
Pieces:	7
Class:	CM2
Shock stage:	S1
Weathering grade:	W1
Fayalite (mol%):	0.51
Classifier:	K. Armstrong, A. Ruzicka, Cascadia
Type spec mass (g):	5.0
Type spec location:	Cascadia
Main mass:	Keith Dickson
Comments:	Submitted by A. Ruzicka

Institutions
and collections

Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9933 approved meteorites from (Northwest Africa) (plus 1837 unapproved names)

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