Meteoritical Bulletin: Entry for Northwest Africa 8625

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Northwest Africa 8625

Basic information

Name: Northwest Africa 8625
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8625
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass: 384 g

Classification
history:

Meteoritical Bulletin:	MB 103	(2014)	Mesosiderite-A
Recommended:			Mesosiderite-A [explanation]

This is 1 of 3 approved meteorites classified as Mesosiderite-A. [show all]
Search for other: Class A mesosiderites, Mesosiderites, and Metal-rich meteorites

Comments:

Approved 25 Nov 2014

Writeup

Writeup from MB 103:

Northwest Africa 8625 (NWA 8625)

(Northwest Africa)

Purchased: 2014 May 8

Classification: Mesosiderite (group A)

History: Purchased in Erfoud May 8, 2014.

Physical characteristics: Many rusted stones without fusion crust. Cut surface reveals a dark interior with abundant mm-sized metal grains.

Petrography: Coarse crystalline rock with recrystallized texture evidenced by triple junctions and lobate silicates, and subhedral troilite and metal. Pyroxene and plagioclase up to 2.5 mm, troilite and metal to mm. Modal abundances (point counting, N=394): pyroxene 51%, plagioclase 27%, troilite 11%, metal and its weathering products 10%.

Geochemistry: Orthopyroxene Fs_30.0_±0.6Wo_3.4±0.2, FeO/MnO=27.8 (N=3). Plagioclase An_93.8Ab_5.9Or_0.3(N=3). Magnetic susceptibility log χ = 5.27 (χ in 10^-9 m³/kg)

Classification: Mesosiderite-A

Specimens: 24 g and a polished section in CEREGE. Main mass with P. Thomas

Data from:
  MB103
  Table 0
  Line 0:

Place of purchase:	Erfoud (Morocco)
Date:	P 2014 May 8
Mass (g):	384
Pieces:	many
Class:	Mesosiderite-A
Weathering grade:	moderate
Ferrosilite (mol%):	30.0±0.6 (N=3)
Wollastonite (mol%):	3.4±0.2
Magnetic suscept.:	5.27
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	24
Type spec location:	CEREGE
Main mass:	P. Thomas
Comments:	Submitted by J. Gattacceca

Institutions
and collections

CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7579 approved meteorites from (Northwest Africa) (plus 1969 unapproved names)

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