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Tanezrouft 090
Basic information Name: Tanezrouft 090
     This is an OFFICIAL meteorite name.
Abbreviation: Tnz 090
Observed fall: No, but it is possible
Year found: 2019
Country: Algeria
Mass:help 6.22 kg
Recommended:  L6    [explanation]

This is 1 of 11692 approved meteorites (plus 6 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 18 Jul 2020
Writeup from MB 109:

Tanezrouft 090 (Tnz 090)        25.163°N, 0.289°E

Adrar, Algeria

Find, possible fall: 2019 Oct 1

Classification: Ordinary chondrite (L6)

History: On October 1, 2019, at around 11 pm, observers in the area south of Adrar, Algeria, witnessed a bright fireball event. After searching by hunters in the desert, multiple crusted and broken stones were found together on October 13 in an area close to Bir Zmila, northwest of the town of Ouallene. Naji Ben Faraji purchased the stones in Tindouf, Algeria on October 27, 2019.

Physical characteristics: A total of 16 pieces ranging in weight from 43 g to 1489 g (combined weight 6219 g). Most of the broken stones are partially coated by fresh black fusion crust, and the interiors are overall light gray with visible fresh metal and some thin, black shock melt veinlets.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Very fresh, highly recrystallized specimen with very sparse remnant chondrules and partial chondrules. Much of the studied thin section exhibits a poikiloblastic texture. Accessory phases include lightly stained kamacite, taenite, troilite, chromite, chlorapatite and merrillite.

Geochemistry: Olivine (Fa24.9±0.2, range Fa24.6-25.1, N = 6), low-Ca pyroxene (Fs20.7±0.3Wo1.7±0.1, range Fs20.4-21.1Wo1.6-1.8, N = 5), augite (Fs8.0±0.1Wo44.6±0.3, range Fs7.9-8.1Wo44.3-44.8, N = 3).

Classification: Ordinary chondrite (L6).

Specimens: 20.3 g including one polished thin section at UWB; remainder held jointly by Mr. N. Ben Faraji and Mr. M. Brahim Sueilem.

Data from:
  Table 0
  Line 0:
Place of purchase:Tindouf
Date:2019 Oct 1
Mass (g):6219
Shock stage:S2
Weathering grade:W0/1
Fayalite (mol%):24.9±0.2
Ferrosilite (mol%):20.7±0.3
Wollastonite (mol%):1.7±0.1
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.3
Type spec location:UWB
Main mass:N. Ben Faraji/M. Brahim Sueilem
Comments:Work name NBF-MN47; submitted by A. Irving
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     Recommended::   (25° 9' 47"N, 0° 17' 20"E)

     This is 1 of 165 approved meteorites from Adrar, Algeria (plus 1 unapproved name)
     This is 1 of 1140 approved meteorites from Algeria (plus 27 unapproved names) (plus 4 impact craters)
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