Meteoritical Bulletin: Entry for Northwest Africa 10707

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Northwest Africa 10707

Basic information

Name: Northwest Africa 10707
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10707
Observed fall: No
Year found: 2016
Country: Western Sahara
Mass: 23.7 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	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 20 Jun 2016

Writeup

help

Writeup from MB 105:

Northwest Africa 10707 (NWA 10707)

Western Sahara

Purchased: Jan 2016

Classification: HED achondrite (Eucrite, polymict)

History: Purchased in January 2016; reportedly found in El-Hamada, November 2015.

Physical characteristics: Single stone with fresh fusion crust. A saw-cut surface shows a very fine-grained breccia with light gray color.

Petrography: (C. Agee, UNM) This is a polymict breccia with at least two distinct lithologies: 1) equilibrated type 6 basaltic eucrite and 2) cumulate eucrite. Ubiquitous sulfide and chromite present. Some shock melt was observed.

Geochemistry: (C. Agee and M. Spilde, UNM) Cumulate low-Ca pyroxene Fs_36.1±2.8Wo_2.8±1.0, Fe/Mn=31±0, n=2; basaltic eucrite low-Ca pyroxene Fs_52.1±2.6Wo_5.1±2.7, Fe/Mn=31±1, n=9; basaltic eucrite high-Ca pyroxene Fs_25.7±4.1Wo_38.6±6.0, Fe/Mn=29±4, n=2; plagioclase An_79.6±6.7, n=4.

Classification: Polymict eucrite

Specimens: 5 g including a probe mount on deposit at UNM, DPitt holds the main mass.

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P Jan 2016
Mass (g):	23.7
Pieces:	1
Class:	Eucrite-pmict
Shock stage:	high
Weathering grade:	low
Ferrosilite (mol%):	36.1±2.8, 52.1±2.6, 25.7±4.1
Wollastonite (mol%):	2.8±1.0, 5.1±2.7, 38.6±6.0
Classifier:	C. Agee, UNM
Type spec mass (g):	5
Type spec location:	UNM
Main mass:	DPitt
Comments:	Field name MCVICH036; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full

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Geography:

Western Sahara

Western Sahara

Coordinates:

Unknown.

Statistics:
This is 1 of 280 approved meteorites from Western Sahara (plus 20 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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