Meteoritical Bulletin: Entry for Northwest Africa 8704

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Northwest Africa 8704

Basic information

Name: Northwest Africa 8704
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8704
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass: 503 g

Classification
history:

Meteoritical Bulletin:	MB 103	(2014)	Eucrite
Recommended:			Eucrite [explanation]

This is 1 of 508 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 28 Dec 2014

Writeup

Writeup from MB 103:

Northwest Africa 8704 (NWA 8704)

(Northwest Africa)

Purchased: 2014 Oct

Classification: HED achondrite (Eucrite)

History: Purchased in Morocco by Stefan Ralew in October 2014.

Physical characteristics: Single stone (503 g) lacking fusion crust with a mottled light gray and black appearance.

Petrography: (A. Irving and S. Kuehner, UWS) Very fine grained (grainsize < 0.3 mm) with granuloblastic texture. Minerals are unexsolved orthopyroxene, clinopyroxene, calcic plagioclase, ilmenite, Ti-chromite and troilite.

Geochemistry: Orthopyroxene (Fs_59.6-61.0Wo_1.7-2.3, FeO/MnO = 33-35, N = 3), clinopyroxene (Fs_25.1-26.1Wo_43.6-43.1, FeO/MnO = 31-35, N = 3).

Classification: Eucrite (granoblastic).

Specimens: 20.2 g in the form of one polished endcut at UWB; main mass with Ralew.

Data from:
  MB103
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2014 Oct
Mass (g):	503
Pieces:	1
Class:	Eucrite
Shock stage:	moderate
Weathering grade:	low
Ferrosilite (mol%):	59.6-61.0; 25.1-26.1
Wollastonite (mol%):	1.7-2.3; 43.6-43.1
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20.2
Type spec location:	UWB
Main mass:	S. Ralew
Comments:	RA10-1; 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Woreczko Jan & Wadi

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7810 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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