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Touat 004
Basic information Name: Touat 004
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2019
Country: Algeria
Mass:help 345 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 240 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 2 Nov 2020
Writeuphelp
Writeup from MB 109:

Touat 004        27°10’20.6’’N, 0°44’50.0’’W

Adrar, Algeria

Find: March 2019

Classification: Lunar meteorite (feldspathic breccia)

History: The sample was purchased in July 2020 via Internet contact as a single piece of 345 g. Based on the information of the Moroccan dealer the rock was found in the Adrar region, Algeria, in March 2019.

Physical characteristics: The piece has a rough grayish appearance with no obvious fusion crust. Saw cuts reveal a breccia with numerous angular dark clasts. The rock appears to be a relative fine-grained breccia compared to many other lunar breccias. Most obvious are dark clasts up to ~5 mm in size and white veins and areas often including brownish components.

Petrography: (A. Bischoff and K. Klemm, IfP). Optical studies of a thin section show that it is a breccia of different clasts embedded in a fine-grained matrix. The most abundant lithology is a feldspar-rich granulitic breccia. Overall the rock appears to be a well-recrystallized rock. The lithic clasts primarily consist of highland components dominated by anorthositic lithologies. Plagioclase transformed into maskelynite and glassy areas are less common compared to their abundances in many other lunar breccias. The breccia contains large areas and veins of secondary terrestrial alteration materials (mostly carbonates) often including red-brownish mineral aggregates.

Geochemistry: (A. Bischoff and K. Klemm, IfP) Mineral compositions: Olivine Fa35.9±2.1, range Fa32-39, Fe/Mn=109, n=7; low-Ca pyroxene Fs22.8±2.0Wo8.0±3.4 Fe/Mn=55, n=13; plagioclase: An95.4±1.4, n=16

Classification: Lunar meteorite (feldspathic breccia)

Data from:
  MB109
  Table 0
  Line 0:
State/Prov/County:Adrar
Origin or pseudonym:Desert
Date:March 2019
Latitude:27°10'20.6''N
Longitude:0°44'50.0''W
Mass (g):345.0
Pieces:1
Class:Lunar (feldsp. breccia)
Fayalite (mol%):35.9±2.1 (n=7)
Ferrosilite (mol%):22.8 ± 2.0 (n=13)
Wollastonite (mol%):8.0 ± 3.4 (n=13)
Classifier:K. Klemm, A. Bischoff, IfP
Type spec mass (g):20.2
Type spec location:IfP
Main mass:Decker Meteorite Museum
Comments:Working No.: De-13, suggested name Adrar004; submitted by Klemm K.
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. 109, in preparation (2020)
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Geography:

Algeria
Coordinates:
     Recommended::   (27° 10' 21"N, 0° 44' 50"W)

Statistics:
     This is 1 of 163 approved meteorites from Adrar, Algeria (plus 1 unapproved name)
     This is 1 of 1136 approved meteorites from Algeria (plus 27 unapproved names) (plus 4 impact craters)
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