Meteorite - Eucrite (melt breccia) - NWA 14223 - 4.0g - part polished slice

Description

On offer is a complete polished slice from
NWA 14223
classified as a
HED
of type
Ecurite-melt breccia
.
Weight: 4.0 grams
This
specimen comes with a signed
COA
and a
protection box
We offer combined shipping
We are a
Global Meteorites Association
trusted
member
#
G0064
Official entry in the Meteorites database bulletin :
Northwest Africa 14223
Basic information
Name:
Northwest Africa 14223
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 14223
Observed fall:
No
Year found:
2021
Country:
(Northwest Africa)
Mass:
202 g
Classification
history:
Recommended:
Eucrite-melt breccia
[explanation]
This is 1 of 58 approved meteorites classified as Eucrite-melt breccia.
[show all]
Search for other:
Achondrites
,
Eucrites
, and
HED achondrites
Comments:
Approved 18 Sep 2021
Writeup
Writeup from MB 110:
Northwest Africa 14223
(NWA 14223)
(Northwest Africa)
Purchased: 2021
Classification: HED achondrite (Eucrite, melt breccia)
History
: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania, in 2021.
Physical characteristics
: Dark grayish rock with minor fusion crust.
Petrography
: The meteorite is an eucrite-melt breccia composed of up to 2.0 mm sized mineral fragments set into abundant fine-grained and widely melted matrix. Predominant minerals are exsolved pyroxenes (low Ca-pyroxene with Ca-pyroxene exsolutions and vice versa) and calcic plagioclase. Pyroxenes are heavily fractured and contain fine-grained cataclastic zones. Mineral grains are partly resorbed where in contact with the melt that shows abundant schlieren. Minor phases include Ti-chromite, ilmenite, and FeS. No metallic iron has been detected. Contains secondary calcite and barite.
Geochemistry
: low-Ca pyroxene host crystals to augite exsolutions: Fs
43.1±0.1
Wo
2.6±0.1
(Fs
42.9-43.4
Wo
2.4-2.9
, FeO/MnO=28-31, n=10); augite exsolutions: Fs
18.2±0.5
Wo
43.6±0.4
(Fs
17.6-19.0
Wo
42.8-44.3
, FeO/MnO=22-27, n=10); calcic plagioclase: An
91.6±0.6
(An
90.3-92.3
, n=11)