Meteorite NWA 6933, very nice Eucrite Melt Rock...

Description

NWA 6933
NWA 6933
Found Sahara, 2010
Achondrite
Eucrite Melt Rock
Specimen is a 1.25--61g slice
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Northwest Africa 6933
Basic information
Name:
Northwest Africa 6933
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 6933
Observed fall:
No
Year found:
2010
Country:
(Northwest Africa)
Mass:
835 g
Classification
history:
Recommended:
Eucrite
Comments:
Approved 14 Nov 2013
Writeup
Writeup from MB 102:
Northwest Africa 6933
(NWA 6933)
(Northwest Africa)
Purchased: 2010
Classification: HED achondrite (Eucrite)
Petrography
: (K. Metzler,
IfP
) Coarse-grained eucritic clasts with ophitic to subophitic textures and mineral fragments (pyroxene, plagioclase, silica polymorph) set in a dark gray matrix. The matrix represents a crystallized melt with subophitic texture consisting of pyroxene and skeletal plagioclase crystals. Lithic clasts and mineral fragments are strongly recrystallized. Some pyroxene fragments contain Fe-rich olivine veins. Accessories are ilmenite, troilite, and metal (mostly oxidized). Calcite veins occur.
Geochemistry
: Plagioclase compositions: An
89.1±2.0
(85-93; n=15). Olivine veins: Fa
75.
Classification
: Eucritic melt rock
Data from:
MB102
Table 0
Line 0:
Place of purchase:
Morocco
Date:
P 2010
Mass (g):
835
Pieces:
1
Class:
Eucrite
Shock stage:
moderate
Weathering grade:
high
Fayalite (mol%25):
75 (n=1)
Ferrosilite (mol%25):
45.2±11.8 (28-59; n=15)
Wollastonite (mol%25):
22.2±15.4 (6-43)
Classifier:
K. Metzler, IfP
Type spec mass (g):
20
Type spec location:
IfP
Main mass:
F. Kuntz, France
Comments:
Submitted by K. Metzler
Institutions
and collections
IfP
: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Kuntz
: Fabien Kuntz, France;
Website
(private address)
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