Meteoritical Bulletin: Entry for Northwest Africa 6082

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Northwest Africa 6082

Basic information

Name: Northwest Africa 6082
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6082
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass: 85 g

Classification
history:

Meteoritical Bulletin:	MB 102	(2013)	LL3
Recommended:			LL3 [explanation]

This is 1 of 452 approved meteorites classified as LL3. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 22 Oct 2013

Writeup

help

Writeup from MB 102:

Northwest Africa 6082 (NWA 6082)

(Northwest Africa)

Purchased: 2008 Sep

Classification: Ordinary chondrite (LL3)

Petrography: (A. Irving and S. Kuehner, UWS) Relatively metal-poor specimen containing well-formed, fairly large ( to 1 mm) chondrules. The content of metal (+ minor Fe hydroxide) = 2 vol%. Minerals are olivine, low-Ca pyroxene, subcalcic augite, sodic plagioclase, altered kamacite, chromite, iron phosphide, troilite.

Geochemistry: Olivine (Fa_13.0-59.3; Cr₂O₃ in ferroan olivine 0.04-0.08 wt.%, mean 0.06, s.d. 0.01, N = 7), low-Ca pyroxene (Fs_1.2-19.5Wo_0.5-6.0), subcalcic augite (Fs_23.7-39.6Wo_26.7-31.6). Oxygen isotopes (D. Rumble, CIW): analyses of acid-washed subsamples by laser fluorination gave δ¹⁸O 5.91, 5.99; δ¹⁷O 3.84, 3.82; Δ¹⁷O 0.730, 0.669 per mil.

Classification: Chondrite (LL3.5). Subtype estimated to be 3.5 based on Cr₂O₃ range in ferroan olivine. Estimation of subtype based on histograms (Fig. 4) in Grossman and Brearley (2005).

Bibliography:

Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)

Data from:
  MB102
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2008 Sep
Mass (g):	85
Pieces:	1
Class:	LL3
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	13.0-59.3 (n=9)
Ferrosilite (mol%):	1.2-19.5
Wollastonite (mol%):	0.5-6.0
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	17.6
Type spec location:	UWB
Main mass:	B. Scarborough
Comments:	BS 10-1; submitted by A. Irving

Plots:

O isotopes:

Institutions
and collections

UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
CIW: Carnegie Insitution Washington, Geophysical Laboratory, 5251 Broad Branch Rd., NW, Washington DC 20015, United States (institutional address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015

Find references in NASA ADS:
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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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