Meteorite - NWA 13652 Winonaite 107g Main Mass - The All-Metal Winonaite

Description

On offer is the main mass
of
Northwest Africa 13652 -
Primitive Achondrite (
Winonaite) - This
find was recovered in Algeria on September/October 2020.
This particular piece
exhibits
extremely
unique
characteristics
as having been almost
entirely
metal
Weight: 107g
Comes with COA signed by me (current main mass holder)
Basic information
Name:
Northwest Africa 13652
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 13652
Observed fall:
No
Year found:
2020
Country:
(Northwest Africa)
Mass:
390 g
Classification
history:
Recommended:
Winonaite
[explanation]
This is 1 of 46 approved meteorites classified as Winonaite.
[show all]
Search for other:
Primitive achondrites
,
Winonaites
Comments:
Approved 16 Jan 2021
Writeup
Writeup from MB 110:
Northwest Africa 13652
(NWA 13652)
(Northwest Africa)
Purchased: 2020 Oct
Classification: Primitive achondrite (Winonaite)
History
: The meteorite was purchased from a dealer in Tindouf, Algeria.
Physical characteristics
: Dark brownish rock without fusion crust.
Petrography
: The meteorite exhibts a recrystallized texture with abundant 120 degree triple junctions present at mineral grain boundaries. Predominant mineral phases are equigranular, 100 to 300 µm sized Mg-rich olivine, low-Ca pyroxene, augite, and sodic feldspar grains. Opaque phases are kamacite, taenite, and troilite which ocurr finely dispersed in the section studied. No relict chondrules were observed.
Geochemistry
: olivine: Fa
3.2±0.1
(Fa
3.1-3.3
FeO/MnO=12±1, n=12); low-Ca pyroxene: Fs
4.1±0.1
Wo
1.9±0.1
(Fs
4.0-4.3
Wo
1.8-2.1
, FeO/MnO=11±1, n=13); Ca-pyroxene: Fs
1.4±0.1
Wo
45.8±1.3
(Fs
1.2-1.7
Wo
44.6-48.1
, FeO/MnO=9±2, n=12); feldspar: An
22.0±0.4
Ab
75.7±0.4
Or
2.3±0.2
, n=11
Classification
: Winonaite; likely paired with
NWA 13624
Data from:
MB110
Table 0
Line 0:
Place of purchase:
Tindouf, Algeria
Date:
P 2020 Oct
Mass (g):
390
Pieces:
6
Class:
Winonaite
Shock stage:
S1
Weathering grade:
low
Fayalite (mol%):
3.2
Ferrosilite (mol%):
4.1; 1.4
Wollastonite (mol%):
1.9; 45.8
Classifier:
A. Greshake, MNB
Type spec mass (g):
48
Type spec location:
MNB
Main mass:
Salamu Hamad