Meteoritical Bulletin: Entry for Northwest Africa 6065

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Northwest Africa 6065

Basic information

Name: Northwest Africa 6065
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6065
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass: 883 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	Achondrite-ung
Recommended:			Achondrite-ung [explanation]

This is 1 of 128 approved meteorites classified as Achondrite-ung. [show all]
Search for other: Achondrites, Ungrouped achondrites

Comments:

Approved 31 Jul 2017

Writeup

help

Writeup from MB 106:

Northwest Africa 6065 (NWA 6065)

(Northwest Africa)

Purchased: 2009

Classification: Ungrouped achondrite

History: The meteorite was bought in 2009 from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: A single brownish individual without fusion crust was purchased.

Petrography: The meteorite shows an equilibrium texture dominantly composed of 200-600 µm sized olivine (77 vol%) and Ca-pyroxene (10 vol%) grains that often share 120° grain boundaries. Minor phases include Cl-rich apatite, chromite, troilite, and FeNi metal which is often altered to iron hydroxides. Neither low-Ca pyroxene nor plagioclase has been found in the two thin sections studied.

Geochemistry: olivine: Fs_29.4±0.2(Fs_29.2-29.7, n=17, FeO/MnO=57); Ca-pyroxene: Fs_9.7±0.7Wo_44.5±0.5(Fs_9.3-12.3Wo_43.5-44.9, n=18, FeO/MnO=26, Cr₂O₃ = 0.74wt%, Al₂O₃ = 0.71wt%); oxygen isotopes (R. Tanaka and D. Rumble, Institute for Study of the Earth’s Interior, OkaU): δ¹⁸O=5.558, 5.598; δ¹⁷O=2.830, 2.873; Δ¹⁷O= -0.095, -0.073 (all per mil).

Classification: Achondrite, ungrouped (brachinite-like). Pairing with NWA 5400 seems likely.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2009
Mass (g):	883
Pieces:	1
Class:	Achondrite-ung
Shock stage:	low
Weathering grade:	moderate
Fayalite (mol%):	29.4±0.2 (29.2-29.7, n=17)
Ferrosilite (mol%):	9.7±0.7 (9.3-12.3, n=18)
Wollastonite (mol%):	44.5±0.5 (43.5-44.9, n=18)
Classifier:	A. Greshake, MNB
Type spec mass (g):	22.4
Type spec location:	MNB
Main mass:	Beat Booz
Comments:	Submitted by Ansgar Greshake

Plots:

O isotopes:

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
OkaU: Institute for Study of the Earth's Interior, Okayama University, Misasa Tottori 682-0193, Japan (institutional address)

Catalogs:

References:

Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.

Find references in NASA ADS:
Find references in Google Scholar:

Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Beat Booz

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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