Meteoritical Bulletin: Entry for Northwest Africa 8780

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Northwest Africa 8780

Basic information

Name: Northwest Africa 8780
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8780
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass: 347 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	CK4
Recommended:			CK4 [explanation]

This is 1 of 128 approved meteorites classified as CK4. [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 Mar 2017

Writeup

Writeup from MB 106:

Northwest Africa 8780 (NWA 8780)

(Northwest Africa)

Purchased: 2014 Dec

Classification: Carbonaceous chondrite (CK4)

History: Purchased by Greg Hupé in December 2014 from a Moroccan dealer in Paris, France.

Physical characteristics: Two pieces (286 g and 61 g) which fit together as a single stone.

Petrography: (A. Irving and S. Kuehner, UWS) Separated, well-formed mm-sized chondrules containing Cr-magnetite together with sparse CAI are set within a finer grained, stained matrix. Minerals are olivine, orthopyroxene, subcalcic augite, intermediate plagioclase, Cr-magnetite and altered Ni-poor kamacite.

Geochemistry: Olivine (Fa_30.5-30.9, FeO/MnO = 101-134, N = 3), orthopyroxene (Fs_24.3-24.4Wo_0.6-0.7, N = 3), subcalcic augite (Fs_14.4-14.6Wo_32.5-33.4, N = 2).

Classification: Carbonaceous chondrite (CK4).

Specimens: 20.1 g including one polished thin section at UWB; the remainder is held by GHupé

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Paris
Date:	P 2014 Dec
Mass (g):	347
Pieces:	2
Class:	CK4
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	30.5-30.9
Ferrosilite (mol%):	24.3-24.4
Wollastonite (mol%):	0.6-0.7
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20.1
Type spec location:	UWB
Main mass:	G. Hupe
Comments:	GH-465; submitted by A. Irving

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)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
Hupe: (old address—now see GHupé or AHupé) G. and A. Hupe, 2616 Lake Youngs Court SE, Renton, WA 98058., United States (private address)

Catalogs:

References:

Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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