Meteoritical Bulletin: Entry for Nagjir 003

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Nagjir 003

Basic information

Name: Nagjir 003
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2022
Country: Western Sahara
Mass: 198 g

Classification
history:

Meteoritical Bulletin:	MB 111	(2023)	Eucrite-pmict
Recommended:			Eucrite-pmict [explanation]

This is 1 of 409 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 20 Jun 2022

Writeup

help

Writeup from MB 111:

Nagjir 003 23°44’41’’N, 14°14’48’’W

Rio de Oro, Western Sahara

Purchased: 2022 Feb

Classification: HED achondrite (Eucrite, polymict)

History: Found in Western Sahara in December 2021

Petrography: (K. Metzler, IfP) Fine-grained polymict breccia, consisting of mm-sized basalt clast and mineral fragments (pyroxene, plagioclase) set in a fine-grained matrix of related debris. The mostly clastic matrix is intermingled with mm-sized subrounded domains of crystallized melt. Most pyroxenes exhibit augite exsolution lamellae. Several Fe-rich olivine fragments were found. Accessories are a silica polymorph, ilmenite, chromite, troilite, and Ni-free metallic iron.

Geochemistry: Mineral compositions and geochemistry: Basalt clast: Low-Ca pyroxene (host): Fs_61.3±0.8Wo_2.3±0.4(Fs_60.1-62.7Wo_1.8-3.1); mean Fe/Mn (at.): 30.1; n=10. Ca-rich pyroxene (exsolution lamellae) Fs_27.1±0.3Wo_42.3±0.5(Fs_26.4-27.6Wo_41.7-43.2); n=10. Plagioclase An_89.7±0.7Or_0.2±0.2(An_88.6-90.6Or_0.0-0.6); n=10. Fine-grained matrix: Low-Ca pyroxene (host): Fs_66.0±4.2Wo_2.6±0.8(Fs_57.7-69.1Wo_1.9-4.4); mean Fe/Mn (at.): 30.8; n=10. Ca-rich pyroxene (exsolution lamellae) Fs_30.8±2.4Wo_42.5±0.9(Fs_26.4-33.5Wo_41.2-44.1); n=10. Plagioclase An_89.6±2.4Or_0.1±0.2(An_86.1-93.0Or_0.0-0.7); n=10. Olivine: Fa_76.8±4.9(Fa_68.2-81.9); mean Fe/Mn (at.): 45.7; n=8.

Classification: Polymict eucrite, based on large variations of matrix mineral chemistry, compared to the restricted variations in the investigated basalt clast.

Data from:
  MB111
  Table 0
  Line 0:

State/Prov/County:	Rio de Oro
Place of purchase:	Tata, Morocco
Date:	P 2022 Feb
Latitude:	23°44'41''N
Longitude:	14°14'48''W
Mass (g):	198
Pieces:	5
Class:	Eucrite-pmict
Shock stage:	Moderate
Weathering grade:	Low
Fayalite (mol%):	76.8±4.9
Ferrosilite (mol%):	66.0±4.2; 30.8±2.4
Wollastonite (mol%):	2.6±0.8; 42.5±0.9
Classifier:	K. Metzler, IfP
Type spec mass (g):	20
Type spec location:	IfP
Main mass:	Meteorite Museum & Shop, Stephan Decker, Oberwesel, Germany
Comments:	Submitted by K. Metzler, IfP

Institutions
and collections

IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)

Catalogs:

References:

Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?

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Geography:

Western Sahara

Western Sahara

Coordinates:
Recommended::	(23° 44' 41"N, 14° 14' 48"W)

Statistics:
This is 1 of 50 approved meteorites from Rio de Oro, Western Sahara
This is 1 of 280 approved meteorites from Western Sahara (plus 20 unapproved names)

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Revision
history:

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