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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:help 198 g
Classification
  history:
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 373 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 20 Jun 2022
Writeuphelp
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): Fs61.3±0.8 Wo2.3±0.4 (Fs60.1-62.7 Wo1.8-3.1); mean Fe/Mn (at.): 30.1; n=10. Ca-rich pyroxene (exsolution lamellae) Fs27.1±0.3Wo42.3±0.5 (Fs26.4-27.6Wo41.7-43.2); n=10. Plagioclase An89.7±0.7Or0.2±0.2 (An88.6-90.6Or0.0-0.6); n=10. Fine-grained matrix: Low-Ca pyroxene (host): Fs66.0±4.2 Wo2.6±0.8 (Fs57.7-69.1Wo1.9-4.4); mean Fe/Mn (at.): 30.8; n=10. Ca-rich pyroxene (exsolution lamellae) Fs30.8±2.4Wo42.5±0.9 (Fs26.4-33.5Wo41.2-44.1); n=10. Plagioclase An89.6±2.4 Or0.1±0.2 (An86.1-93.0 Or0.0-0.7); n=10. Olivine: Fa76.8±4.9 (Fa68.2-81.9); 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 Meteoritical Bulletin, no. 111, in preparation (2022)
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Geography:

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

Statistics:
     This is 1 of 45 approved meteorites from Rio de Oro, Western Sahara
     This is 1 of 254 approved meteorites from Western Sahara (plus 20 unapproved names)
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