Meteoritical Bulletin: Entry for Northwest Africa 10287

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Northwest Africa 10287

Basic information

Name: Northwest Africa 10287
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10287
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass: 224 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	H/L5
Recommended:			H/L5 [explanation]

This is 1 of 9 approved meteorites classified as H/L5. [show all]
Search for other: H chondrites, H chondrites (type 4-7), H/L chondrites, H/L chondrites (type 4-7), L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 3 Oct 2015

Writeup

Writeup from MB 104:

Northwest Africa 10287 (NWA 10287)

(Northwest Africa)

Purchased: 2005

Classification: Ordinary chondrite (H/L5)

History: Purchased by an anonymous collector from a dealer at the Munich Show in 2005 and subsequently donated to the PSF.

Petrography: (A. Irving and S. Kuehner, UWS) Sparse chondrules (apparent diameter up to 2.1 mm). Most metal is fresh with only minor staining.

Geochemistry: Olivine (Fa_21.7-21.9, N = 3), orthopyroxene (Fs_18.4-19.1Wo_1.3-1.4, N = 3), augite (Fs_6.2-6.3Wo_46.2-46.8, N = 2).

Classification: Ordinary chondrite (H/L5). The H/L classification is based primarily on the intermediate olivine composition (almost identical to that for Haxtun), but is also consistent with the intermediate magnetic susceptibility value for such a fresh specimen.

Specimens: The entire specimen plus one polished thin section made from it are reposited at PSF.

Data from:
  MB104
  Table 0
  Line 0:

Place of purchase:	Munich
Date:	P 2005
Mass (g):	224
Pieces:	1
Class:	H/L5
Shock stage:	S2
Weathering grade:	W0/1
Fayalite (mol%):	21.7-21.9
Ferrosilite (mol%):	18.4-19.1
Wollastonite (mol%):	1.3-1.4
Magnetic suscept.:	5.2
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	226
Type spec location:	PSF
Main mass:	PSF
Comments:	CHC 15018; 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 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 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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