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| Touat 004 | |||||||||||||||||||||||||||||||||
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| 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:  345 g | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 291 approved meteorites classified as Lunar (feldsp. breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||||
| Comments: | Approved 2 Nov 2020 | ||||||||||||||||||||||||||||||||
| Writeup |
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: |
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| Institutions and collections |
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012) |
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| References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:
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Statistics: This is 1 of 184 approved meteorites from Adrar, Algeria (plus 1 unapproved name) This is 1 of 1250 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||||
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