Meteoritical Bulletin: Entry for Northwest Africa 3155

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Northwest Africa 3155

Basic information

Name: Northwest Africa 3155
This is an OFFICIAL meteorite name.
Abbreviation: NWA 3155
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass: 878 g

Classification
history:

Meteoritical Bulletin:	MB 91	(2007)	CK5
Recommended:			CK5 [explanation]

This is 1 of 201 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 1 Sep 2006

Writeup

help

Writeup from MB 91:

Northwest Africa 3155

Morocco

Find: August 2004

Carbonaceous chondrite (CK5)

History: Purchased in August 2004 by Greg Hupé from a Moroccan dealer in Tagounite.

Physical characteristics: A complete brownish stone with thin fusion crust weighing 878 g.

Petrography: (A. Irving and S. Kuehner, UWS) Dispersed but relatively well-formed, recrystallized chondrules in a fine-grained matrix. Abundant olivine, plagioclase, clinopyroxene, and euhedral to subhedral magnetite.

Geochemistry: Olivine (Fa_30–32), plagioclase (An_27.6–35.5Or_6.8–4.5), clinopyroxene (Mg/(Mg+Fe) ~0.75), Cr-rich magnetite (Cr₂O₃ = 5.4–5.7 wt%). Oxygen isotopes: (D. Rumble, CIW) Analyses of two different whole rock fragments by laser fluorination gave, respectively, δ¹⁸O = -0.41, -0.46; δ¹⁷O = -4.59, -4.54; Δ¹⁷O = -4.376, -4.299 (all ‰).

Classification: Carbonaceous chondrite (CK5); low shock with moderate weathering.

Type specimen: A total of 20 g of sample and one polished thin section are on deposit at UWS. G. Hupé holds the main mass.

Data from:
  MB91
  Table 2
  Line 150:

Place of purchase:	Tagounite, Morocco
Date:	2004 Aug
Mass (g):	878
Pieces:	1
Class:	CK5
Shock stage:	S1
Weathering grade:	W2-3
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20
Type spec location:	UWS
Main mass:	G. Hupé

Plots:

O isotopes:

Institutions
and collections

UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
CIW: Carnegie Insitution Washington, Geophysical Laboratory, 5251 Broad Branch Rd., NW, Washington DC 20015, United States (institutional address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)

Find references in NASA ADS:
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Photos:

Credit	Photos
Photos from the Encyclopedia of Meteorites:
Don Edwards
The Hupe Collection
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Jay Piatek

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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