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Oued Tilemsi 001
Basic information Name: Oued Tilemsi 001
     This is an OFFICIAL meteorite name.
Abbreviation: OT 001
Observed fall: No
Year found: 2022
Country: Algeria
Mass:help 4.69 kg
Meteoritical Bulletin:  MB 111  (2023)  Winonaite
Recommended:  Winonaite    [explanation]

This is 1 of 85 approved meteorites (plus 1 unapproved name) classified as Winonaite.   [show all]
Search for other: Primitive achondrites, Winonaites
Comments: Approved 6 Aug 2022
Writeup from MB 111:

Oued Tilemsi 001 (OT 001)        25º52.044’N, 3º16.8623’W

Adrar, Algeria

Find: 2022

Classification: Primitive achondrite (Winonaite)

History: Twenty-six samples were found in western Algeria on 10 February 2022.

Physical characteristics: The type specimen is orange-colored and irregular-shaped and lacks fusion crust. The interior is dark red in color and shows a poikiloblastic texture.

Petrography: Description and classification (A. Love, App) Sample shows poikiloblastic texture composed of (vol%): 0.5 mm to 1 cm-sized clinoenstatite(49), olivine(19), augite(8), twinned plagioclase(6) FeNi metal and troilite. Olivine, augite and plagioclase occur as interstitial phases and as chadacrysts. Olivine also occurs in lumps of equigranular grains interstitial to oikocrysts. Additional minerals are: graphite (associated with metals), schreibersite, daubréelite and a silica polymorph.

Geochemistry: Forsterite (Fa1.11±0.17, Fe/Mn=3.73±0.59, Cr2O3=0.09±0.04, n=18); Enstatite (Fs1.27±0.10Wo1.36±0.82, Fe/Mn=2.36±0.30, n=16); Augite (Fs0.81±0.11Wo42.22±0.26, Fe/Mn=1.91±0.24, n=14); oligoclase (Ab68.81±9.29Or0.27±0.05, n=4); andesine (Ab60.32±0.42Or0.17±0.00, n=6).

Classification: Primitive achondrite (winonaite). Based on the reduced compositions and reduced mineral assemblage and presence of metal, sample is a winonaite. Grainsize and texture are comparable to Hammadah al Hamra 193 (Floss et al., 2007).

Specimens: Jatri Zuber Sidi holds the main masses. 22.23 g and a polished thin section are on deposit at App.

  • Floss C., Jolliff B. L., Benedix G. K., Stadermann F. J. and Reid J. (2007) Hammadah al Hamra 193: The first amphibole-bearing winonaite. American Mineralogist 92, 460–467. (link)
Data from:
  Table 0
  Line 0:
Mass (g):4693
Shock stage:U-S2
Weathering grade:low
Fayalite (mol%):1.1±0.2
Ferrosilite (mol%):1.3±0.1; 0.8±0.1
Wollastonite (mol%):1.4±0.8; 42.2±0.3
Classifier:A. Love, App
Type spec mass (g):22.23
Type spec location:App
Main mass:Jatri Zuber
Comments:Submitted by Anthony Love
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
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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     Recommended::   (25° 52' 3"N, 3° 16' 52"W)

     This is 1 of 199 approved meteorites from Adrar, Algeria (plus 1 unapproved name)
     This is 1 of 1335 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)
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