Meteoritical Bulletin: Entry for Northwest Africa 4375

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Northwest Africa 4375

Basic information

Name: Northwest Africa 4375
This is an OFFICIAL meteorite name.
Abbreviation: NWA 4375
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass: 12.2 g

Classification
history:

Meteoritical Bulletin:	MB 92	(2007)	Winonaite
Recommended:			Winonaite [explanation]

This is 1 of 81 approved meteorites (plus 1 unapproved name) classified as Winonaite. [show all]
Search for other: Primitive achondrites, Winonaites

Comments:

Approved 24 Jul 2007

Writeup

help

Writeup from MB 92:

Northwest Africa 4375

Northwest Africa

Find: 2005

Primitive achondrite (winonaite)

History: An anonymous finder collected the meteorite in the western part of the Sahara. The main mass holder purchased the sample at a mineral fair in Munich, Germany in 2005.

Physical characteristics: A small oval stone of 12.2 g was recovered.

Petrography: (A. Greshake, MNB). The meteorite consists of low-Ca pyroxene, Ca-pyroxene, olivine, plagioclase, metallic Fe-Ni, and troilite. Silicate grains are often euhedral and display an equigranular texture with abundant triple junctions.

Mineral compositions and geochemistry:Olivine (Fa_4.4), low-Ca pyroxene (Fs₅Wo_1.5), Ca-pyroxene, (Fs_2.3Wo_46.2). Oxygen Isotopes: (I. A. Franchi and R. C. Greenwood, OU) Mean of two replicates δ¹⁷O = 2.74, δ¹⁸O = 5.88, Δ¹⁷O = -0.31 (all ‰).

Classification: Primitive achondrite (Winonaite); minimal shock, moderate weathering.

Type specimens: A total of 3.9 g of sample plus one polished thin section are on deposit at MNB. HSSH holds the main mass.

Data from:
  MB92
  Table 2
  Line 58:

Place of purchase:	Munich, Germany
Date:	2005
Mass (g):	12.2
Pieces:	1
Class:	Win
Type spec mass (g):	3.9

Plots:

O isotopes:

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
HSSH: Hanno Strufe, Langenbergstr. 32, 66954 Pirmasens, Germany; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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