Meteoritical Bulletin: Entry for Northwest Africa 10695

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Northwest Africa 10695

Basic information

Name: Northwest Africa 10695
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10695
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 103.4 g

Classification
history:

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

This is 1 of 451 approved meteorites classified as Howardite. [show all]
Search for other: Achondrites, HED achondrites, and Howardites

Comments:

Approved 1 Mar 2017

Writeup

help

Writeup from MB 106:

Northwest Africa 10695 (NWA 10695)

(Northwest Africa)

Purchased: 2016 Feb

Classification: HED achondrite (Howardite)

History: Purchased by Aras Jonikas in February 2016 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed mainly of diogenite lithic clasts and related debris plus ~20 vol.% of basaltic eucrite clasts and ~3 vol.% of altered kamacite grains (up to 1 mm in size) in a finer grained matrix. Diogenitic orthopyroxene exhibits a range in composition. Other minerals are olivine, exsolved pigeonite, calcic plagioclase, silica polymorph, chromite, ilmenite, troilite, taenite and rare forsterite.

Geochemistry: Olivine (Fa_28.1-31.0, FeO/MnO = 42-53, N = 2), diogenitic orthopyroxene (Fs_23.0Wo_1.9; Fs_39.1Wo_3.1; FeO/MnO = 29-30, N = 2), orthopyroxene host (Fs_65.0Wo_3.4, FeO/MnO = 31), clinopyroxene exsolution lamella (Fs_32.4Wo_39.9, FeO/MnO = 31), orthopyroxene host (Fs_38.6Wo_3.2, FeO/MnO = 29), clinopyroxene exsolution lamella (Fs_18.2Wo_40.9, FeO/MnO = 24), forsterite (Fa_9.4, FeO/MnO = 43).

Classification: Howardite (anomalous, olivine-bearing, metal-rich). NWA 10695 is anomalous in having an unusually high content of metal.

Specimens: 20.0 g including one polished thin section at PSF; remainder with Mr. A. Jonikas.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Tucson
Date:	P 2016 Feb
Mass (g):	103.4
Pieces:	1
Class:	Howardite
Shock stage:	low
Weathering grade:	low
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20
Type spec location:	PSF
Main mass:	A. Jonikas
Comments:	AJ16-5; submitted by A. Irving

Institutions
and collections

PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)

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 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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