Meteoritical Bulletin: Entry for Northwest Africa 6369

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Northwest Africa 6369

Basic information

Name: Northwest Africa 6369
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6369
Observed fall: No
Year found: 2009
Country: Algeria
Mass: 14.83 kg

Classification
history:

Meteoritical Bulletin:	MB 100	(2012)	Iron, IAB complex
Recommended:			Iron, IAB complex [explanation]

This is 1 of 82 approved meteorites (plus 1 unapproved name) classified as Iron, IAB complex. [show all]
Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites

Comments:

Approved 30 May 2012

Writeup

help

Writeup from MB 100:

Northwest Africa 6369 (NWA 6369)

Algeria

Found: 2008

Classification: Iron meteorite (IAB complex)

History: Complete individual found in Algeria in 2008 and purchased by anonymous collector in Saint Marie, France, in 2009.

Physical characteristics: Surface is dark brown with developed abrasion relief, polyhedral shape, 14830 g.

Petrography: (S. N. Teplyakova, Vernad) Composed of 80 vol% metal and 20 vol% silicates. Metal consists of polygonal grains of kamacite to 1.5 cm with rare taenite lamellae, spheroidized plessite, shreibersite, troilite and graphite. The silicate inclusions consist of of olivine, pyroxene, minor plagioclase, chromite, graphite, kamacite, taenite and troilite.

Geochemistry: Mineral compositions and geochemistry: (S. E. Borisovsky, IGEM, EMP) Kamacite (Ni 6.5 wt.%, Co 0.46-0.54 wt.%, P 0.03-0.06 wt.%); Olivine Fa_4.9(Fe/Mn=7-12), pyroxene Fs_7.2Wo? (Fe/Mn=7-12), augite En₅₁Wo_45.1, plagioclase Ab_80.7An_15.7, chromite Cr/(Cr+Al) = 97.3 (MnO 2.67, V₂O₃ 0.69, ZnO 1.66). Kamacite microelement composition (M. Humayun, FSU, LA-ICP-MS, ppm): Ga 79, Ge 342, Ru 5.75, Rh - 1.27, Pd 2.8, W 0.92, Re 0.35, Os 4.7, Ir 3.9, Pt 6.44, Au 1.23, As 10.8. Silicates oxygen isotopes composition (I. Franchi, OU, Laser fluorination): δ¹⁷O=2.35, δ¹⁸O=5.39, Δ¹⁷O=-0.45 (per mil).

Classification: Iron (IAB-xomplex, coarsest octahedrite).

Specimens: A total of 77.78 g and polished section are on deposit at Vernad. The anonymous collector holds the main mass.

Data from:
  MB100
  Table 1
  Line 1365:

Place of purchase:	Saint Marie, France
Date:	2008
Mass (g):	14830
Pieces:	1
Class:	Iron, IAB complex
Weathering grade:	minimal
Classifier:	S. N. Teplyakova, Vernad
Type spec mass (g):	77.78
Type spec location:	Vernad
Main mass:	anonymous
Comments:	Submitted by C. A. Lorenz

Plots:

O isotopes:

Institutions
and collections

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)
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)
IGEM: Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetny Per., 35, Moscow, 119017 , Russia (institutional address; updated 16 Dec 2010)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)

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Geography:

Algeria

Algeria

Coordinates:

Unknown.

Statistics:
This is 1 of 1315 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

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