Meteoritical Bulletin: Entry for Northwest Africa 10204

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Northwest Africa 10204

Basic information

Name: Northwest Africa 10204
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10204
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass: 1300 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	Eucrite-pmict
Recommended:			Eucrite-pmict [explanation]

This is 1 of 408 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 18 Jul 2015

Writeup

help

Writeup from MB 104:

Northwest Africa 10204 (NWA 10204)

(Northwest Africa)

Purchased: 2015

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by Aziz Habibi in 2015; reportedly found in near the border between Mauritania and Mali.

Physical characteristics: Three identically appearing pieces. Smooth fusion crusted exterior, broken surface reveals a polymict breccia with numerous fragmental white and dark gray clasts, set in a light-gray groundmass.

Petrography: (C. Agee, UNM) This polymict breccia has at least two distinct lithologies. 1) equilibrated basaltic eucrite; 2) unequilibrated cumulate eucrite. Accessory low-Ni metal, FeNi-metal, silica, ilmenite, troilite, and chromite were observed.

Geochemistry: (C. Agee and N. Muttik, UNM) Basaltic eucrite: low-Ca pyroxene/pigeonite Fs_52.0±3.2Wo_5.9±4.3, Fe/Mn=33±1, n=8; augite Fs_33.8±9.7Wo_30.3±11.2, Fe/Mn=31±1, n=3; plagioclase An_89.4±1.1, n=2. Cumulate eucrite: pigeonite Fs_43.5±4.8Wo_6.9±4.0, Fe/Mn=32±2, n=9; plagioclase An_94.4±0.8, n=4.

Classification: Achondrite (Eucrite, polymict breccia)

Specimens: 20.2 g including a probe mount on deposit at UNM; Aziz Habibi holds the main mass.

Data from:
  MB104
  Table 0
  Line 0:

Place of purchase:	Mauritania
Date:	P 2015
Mass (g):	1300
Pieces:	3
Class:	Eucrite-pmict
Shock stage:	high
Weathering grade:	low
Ferrosilite (mol%):	52.0±3.2, 43.5±4.8
Wollastonite (mol%):	5.9±4.3, 6.9±4.0
Classifier:	C. Agee, UNM
Type spec mass (g):	20.2
Type spec location:	UNM
Main mass:	Aziz Habibi
Comments:	AH-171; submitted by C. Agee, UNM

Institutions
and collections

UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full

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Geography:

Coordinates:

Unknown.

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

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Revision
history:

This lists important revisions made to data for this record.

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