Meteorite NWA 11495 - Achondrite type Eucrite (fine grained polymict breccia)

Description

NWA 11495
NWA 11495
Found Sahara, 2017
Achondrite, Vestan
Eucrite (Polymict Breccia)
Specimen is a 2.15g slice
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Breccia composed mainly of eucritic debris with some lithic eucrite clasts exhibiting diverse textures (intersertal, vitrophyric, variolitic, diabasic) and rare diogenitic orthopyroxene and olivine.
Northwest Africa 11495
Basic information
Name:
Northwest Africa 11495
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 11495
Observed fall:
No
Year found:
2017
Country:
(Northwest Africa)
Mass:
91.4 g
Classification
history:
Recommended:
Eucrite-pmict
[explanation]
Comments:
Approved 28 Nov 2017
Writeup
Writeup from MB 106:
Northwest Africa 11495
(NWA 11495)
(Northwest Africa)
Purchased: 2017 Apr
Classification: HED achondrite (Eucrite, polymict)
History
: Purchased by Fabien
Kuntz
in April 2017 from a dealer in Erfoud, Morocco.
Petrography
: (A. Irving and S. Kuehner,
UWS
) Breccia composed mainly of eucritic debris with some lithic eucrite clasts exhibiting diverse textures (intersertal, vitrophyric, variolitic, diabasic) and rare diogenitic orthopyroxene and olivine. Other minerals are exsolved pigeonite, calcic plagioclase, unexsolved pigeonite, silica polymorph, ilmenite, chromite, Ni-poor metal, troilite and rare composite grains of kamacite+taenite.
Geochemistry
: Orthopyroxene host (Fs
50.5
Wo
1.6
, FeO/MnO = 28), clinopyroxene exsolution lamella (Fs
21.6
Wo
41.5
, FeO/MnO =27), pigeonite (Fs
41.7
Wo
21.3
, FeO/MnO = 31), diogenitic orthopyroxene (Fs
21.0
Wo
1.0
, FeO/MnO = 44), olivine (Fa
64.6-77.2
, FeO/MnO = 47-51, N = 2), plagioclase (An
86.2-86.3
Or
0.5
, N = 2).
Classification
: Eucrite (polymict breccia).
Specimens
: 18.38 g including one polished thin section at
PSF
; remainder with
Kuntz
.
Data from:
MB106
Table 0
Line 0:
Place of purchase:
Erfoud
Date:
P 2017 Apr
Mass (g):
91.4
Pieces:
1
Class:
Eucrite-pmict
Shock stage:
low
Weathering grade:
low
Fayalite (mol%):
64.6-77.2
Classifier:
A. Irving and S. Kuehner, UWS
Type spec mass (g):
18.38
Type spec location:
PSF
Main mass:
F. Kuntz
Comments:
Work name K365; submitted by A. Irving
Institutions
and collections
PSF
: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States;
Website
(institutional address; updated 1 Dec 2011)
UWS
: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Kuntz
: Fabien Kuntz, France;
Website
(private address)
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