MUSEUM QUALITY! MAGNIFICENT NWA 13187 MARTIAN SHERGOTTITE METEORITE! 19.9 GMS

Description

MUSEUM QUALITY!!!
MARVELOUS NWA 13187 MARTIAN METEORITE!!!
MARTIAN SHERGOTTITE FROM NORTHWEST AFRICA!!!
MAGNIFICENT MATRIX!!!
CUT THIN FOR MAXIMUM SURFACE AREA!!!
FANTASTIC FULL SLICE!!!
Find: 2019!!!
Type: Martian Shergottite!!!
TKW: 1600 Grams!!!
Location: Northwest Africa!!!
Specimen Type: Full slice!!!
Dimensions: 74.6 mm x 72.1 mm x 1.9 mm!!!
Specimen weight: 19.9
grams!!!
Northwest Africa 13187
Basic information
Name:
Northwest Africa 13187
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 13187
Observed fall:
No
Year found:
2019
Country:
(Northwest Africa)
Mass:
1600 g
Classification
history:
Recommended:
Martian (shergottite)
This is 1 of 278 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).
Comments:
Approved 29 Feb 2020
Writeup
Writeup from MB 109:
Northwest Africa 13187
(NWA 13187)
(Northwest Africa)
Purchased: 2019 Sep
Classification: Martian meteorite (Shergottite)
History
: Purchased by Mark Lyon in September 2019 from a Moroccan dealer. Some of this material was subsequently sold to Mike Fleeman and Roberto Vargas.
Petrography
: (A. Irving,
UWS
and P. Carpenter,
WUSL
) Diabasic texture. Composed predominantly of zoned clinopyroxene and maskelynite with accessory ulvöspinel (some Cr-bearing), ilmenite, silica polymorph, merrillite, pyrrhotite and minor secondary calcite.
Geochemistry
: Subcalcic augite cores (Fs
20.3-23.3
Wo
36.2-32.0
, FeO/MnO = 28-29, N = 4), ferroan pigeonite rims (Fs
52.4-59.2
Wo
14.2-19.7
, FeO/MnO = 36-39, N = 4), maskelynite (An
50.5-57.2
Or
1.9-0.7
, N = 3).
Classification
: Shergottite (diabasic).
Specimens
: 20.1 g including one polished thin section at
UWB
; remainder held by Mr. M. Lyon, Mr. M. Fleeman (550 g) and Mr. R. Vargas (50 g).
Data from:
MB109
Table 0
Line 0:
Place of purchase:
Morocco
Date:
P 2019 Sep
Mass (g):
1600
Pieces:
2
Class:
Martian (shergottite)
Shock stage:
high
Weathering grade:
low
Ferrosilite (mol%):
20.3-23.3; 52.4-59.2
Wollastonite (mol%):
36.2-32.0; 14.2-19.7
Classifier:
A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):
20.1
Type spec location:
UWB
Main mass:
M. Lyon/M. Fleeman/R. Vargas
Comments:
Work name Lyon19-2; submitted by A. Irving
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