Meteoritical Bulletin: Entry for Northwest Africa 6484

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Northwest Africa 6484

Basic information

Name: Northwest Africa 6484
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6484
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass: 688 g

Classification
history:

Meteoritical Bulletin:	MB 99	(2011)	Lodranite
Recommended:			Lodranite [explanation]

This is 1 of 91 approved meteorites classified as Lodranite. [show all]
Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites

Comments:

Approved 2 Jun 2011

Writeup

help

Writeup from MB 99:

Northwest Africa 6484 (NWA 6484)

(Northwest Africa)

Purchased: June 2010

Classification: Primitive achondrite (Lodranite)

History: Purchased in Sainte Marie (France) in 2010.

Physical characteristics: A greenish-brown 688 g stone without fusion crust.

Petrography: (C. A. Lorenz; Vernad) Unbrecciated, medium-grained achondritic rock with equigranular texture composed of olivine and orthopyroxene with minor feldspar and clinopyroxene, and rare FeNi metal, chromite, and troilite.

Geochemistry: (N. N. Kononkova, Vernad) EMP data: Olivine Fo_88.1(Fe/Mn = 21.7); orthopyroxene En_85.9Wo_2.52(Fe/Mn = 13.5; mg# = 88); En_52.3Wo_42.8; feldspar Ab_75.4An_22.7-Ab₈₄An_13.5.Oxygen isotopic composition (Franchi I. A., OU, Laser fluorination): δ¹⁷O=1.635, δ¹⁸O=4.542, Δ¹⁷O=-0.727 (per mil).

Classification: Achondrite (lodranite). Moderate weathering.

Specimens: A total of 78.3 g sample and one polished section are on deposit at Vernad. The anonymous buyer holds the main mass.

Data from:
  MB99
  Table 0
  Line 0:

Place of purchase:	Sainte Marie, France
Date:	P June 2010
Mass (g):	688
Pieces:	1
Class:	Lodranite
Weathering grade:	moderate
Fayalite (mol%):	11.9
Ferrosilite (mol%):	11.6
Wollastonite (mol%):	2.5
Classifier:	C. A. Lorenz, Vernad
Type spec mass (g):	78.3
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)

Catalogs:

References:

Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]

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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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