"NWA 13752" Ureilite Monomict Primitive Achondrite - Collection 2 Slices 6.55g

Description

DESCRIPTION
"NWA 13752" Ureilite Monomict Primitive Achondrite - Collection 2 Slices 6.55g
TYPE & OFFICIAL NAME:
"NWA 13752" Ureilite Monomict Primitive Achondrite - Collection 2 Thin Slices
FALL/FIND LOCATION:
Mauritania, North West Africa, 2019
WEIGHT:
6.55 g both slices in total
Size of each slice: 4,6cm
REF.:
UU
Observations:
The authenticity of this specimen is guaranteed
by the Geologist J.A.Poblador, member of International Meteorite Collectors Association IMCA 5681 and Global Meteorite Association G0043 and main mass holder of this meteorite.
Northwest Africa 13752
Basic information
Name:
Northwest Africa 13752
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 13752
Observed fall:
No
Year found:
2019
Country:
(Northwest Africa)
Mass:
126 g
Classification
history:
Recommended:
Ureilite
[explanation]
This is 1 of 576 approved meteorites classified as Ureilite.
[show all]
Search for other:
Achondrites
,
Ureilites
Comments:
Approved 21 Feb 2021
Writeup
Writeup from MB 110:
Northwest Africa 13752
(NWA 13752)
(Northwest Africa)
Purchased: 2019
Classification: Ureilite
History
: Bought by Geologist Juan Aviles Poblador on behalf of the University of Alicante (Earth Sciences Department, Laboratory of Applied Petrology) during the Fall of 2019 from an anonymous supplier in Chinguetti, Mauritania.
Physical characteristics
: Single stone with slightly weathered fusion crust.
Petrography
: (D. Sheikh,
FSU
) Specimen displays a coarse-grained cumulate texture (Average grain size ~mm, up to mm) composed primarily of olivine and pigeonite (most grains display reduced rims in contact with either graphite or Fe-Ni metal). Fe-oxide veinlets are present in some areas where kamacite and troilite grains have been weathered.
Geochemistry
: Olivine (Fa
9.9±6.6
, range Fa
0.8-17.2
, Cr
2
O
3
=0.6±0.1 wt%, CaO=0.4±0.1 wt%, n=49), Low-Ca Pyroxene (Fs
14.0±1.8
Wo
7.9±0.2
, range Fs
4.3-15.2
Wo
6.8-8.3
, Cr
2
O
3
=0.9±0.1 wt%, Al
2
O
3
=0.5±0.1 wt%, n=35).
Classification
: Ureilite
Specimens
: 20.2 g at
UCLA
, main mass with Geologist Juan Aviles Poblador.
Data from:
MB110
Table 0
Line 0:
Place of purchase:
Mauritania
Date:
P 2019
Mass (g):
126
Pieces:
1
Class:
Ureilite
Shock stage:
low
Weathering grade:
low
Fayalite (mol%):
9.9±6.6
Ferrosilite (mol%):
14.0±1.8
Wollastonite (mol%):
7.9±0.2
Classifier:
D. Sheikh, FSU
Type spec mass (g):
20.2
Type spec location:
UCLA
Main mass:
Juan Aviles Poblador
Comments:
Submitted by Daniel Sheikh
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