Meteoritical Bulletin: Entry for Northwest Africa 10765

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Northwest Africa 10765

Basic information

Name: Northwest Africa 10765
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10765
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass: 44.2 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	Mesosiderite
Recommended:			Mesosiderite [explanation]

This is 1 of 273 approved meteorites classified as Mesosiderite. [show all]
Search for other: Mesosiderites, Metal-rich meteorites

Comments:

Approved 2 Sep 2016

Writeup

Writeup from MB 105:

Northwest Africa 10765 (NWA 10765)

(Northwest Africa)

Purchased: 2014 Feb

Classification: Mesosiderite

History: Purchased by Dr. David Gregory in February 2008 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Aggregate of predominantly orthopyroxene plus ~30 vol.% metal (kamacite plus minor taenite) and ~5 vol.% anorthite with accessory merrillite, chromite, troilite and silica polymorph (as tiny included grains in some plagioclase).

Geochemistry: Orthopyroxene (Fs_26.7-27.1Wo_2.3-2.0, FeO/MnO = 28-29, N = 3), plagioclase (An_92.1-92.9Or_0.4, N = 2). Oxygen isotopes (K. Ziegler, UNM): analysis of acid-washed subsamples by laser fluorination gave, respectively, δ¹⁷O 1.638, 1.664, 1.645; δ¹⁸O 3.675, 3.733, 3.579; Δ¹⁷O -0.302, -0.307, -0.245 per mil.

Classification: Mesosiderite.

Specimens: 11.27 g plus one polished thick section at ROM; remainder with DGregory.

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Tucson
Date:	P 2014 Feb
Mass (g):	44.15
Pieces:	2
Class:	Mesosiderite
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	26.7-27.1
Wollastonite (mol%):	2.3-2.0
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	11.27
Type spec location:	ROM
Main mass:	DGregory
Comments:	ROM055; submitted by A. Irving

Plots:

O isotopes:

Institutions
and collections

ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (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:

Coordinates:

Unknown.

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

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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