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Telakoast 001
Basic information Name: Telakoast 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2020
Country: Algeria
Mass:help 60 g
Recommended:  C3-ung    [explanation]

This is 1 of 19 approved meteorites classified as C3-ung.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), and Ungrouped chondrites
Comments: Approved 8 Jun 2021
Writeup from MB 110:

Telakoast 001        27.261583° N, 5.357341° E

Tamanghasset, Algeria

Find: 2020 Nov

Classification: Carbonaceous chondrite (C3, ungrouped)

History: Found near Daïet Djerdjir, Algeria, in November 2020.

Physical characteristics: A single very fresh, black fusion-crusted stone (60 g) with one shield-like surface.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL; L. Garvie, ASU) The specimen consists of small, well-formed chondrules (apparent diameter 420±320 µm, N = 20) plus zoned olivine fragments set in a very fine grained matrix (black in thin section). Olivine compositions exhibit a wide range in Fa content with a somewhat bimodal distribution. No CAI were found. Accessory phases identified by electron microprobe analysis are Fe sulfide, FeNi sulfide and kamacite (partly replaced by very fine grained mixtures of indeterminate Fe-S-P-O-bearing phases). X-ray diffraction analysis confirms that olivine has two discrete compositions (one near forsterite and one near Fa12 or higher); clinoenstatite, calcite, pyrrhotite, pentlandite and maghemite were also identified, but reflections for serpentine or smectite are absent.

Geochemistry: Olivine (Fa31.6±28.5, range Fa0.8-81.3, N = 8; Cr2O3 in ferroan olivine 0.09-0.45 wt.%, mean 0.25 wt.%, sd 0.14 wt.%, N = 6), low-Ca pyroxene (Fs15.1±17.0Wo1.9±1.7, range Fs2.4-34.5Wo0.8-3.8, N = 3), pigeonite (Fs1.7Wo11.9), aluminous diopside (Fs2.4±1.8Wo41.7±1.1, range Fs1.1-3.7Wo42.4-40.9, Al2O3 4.6-4.8 wt.%, N = 2). Oxygen isotopes (K. Ziegler, UNM): analyses of acid-washed subsamples by laser fluorination gave, respectively, δ17O -4.148, -6.412, -8.012, -4.481, -6.945; δ18O 2.152, -0.796, -3.151, 0.750, -1.880; Δ17O -5.284, -5.991, -6.348, -4.877, -5.953 per mil (all data linearized).

Classification: Carbonaceous chondrite (C3-ungrouped). Oxygen isotopic compositions are significantly displaced from the CCAM trend to more negative δ17O coupled with higher δ18O values, implying that this is an ungrouped anhydrous carbonaceous chondrite specimen.

Specimens: 12.6 g including one polished thin section at UWB; remainder with Mr. D. Lehman, who is the American agent for the finders.

Data from:
  Table 0
  Line 0:
Date:2020 Nov
Latitude:27.261583° N
Longitude:5.357341° E
Mass (g):60
Shock stage:low
Weathering grade:low
Fayalite (mol%):31.6±28.5
Ferrosilite (mol%):15.1±17.0
Wollastonite (mol%):1.9±1.7
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):12.6
Type spec location:UWB
Main mass:D. Lehman
Comments:Work name DL 1061; submitted by A. Irving
Plots: O isotopes:  
   and collections
ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012)
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
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. 110, in preparation (2021)
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Public domain photographs:
A. Irving   

     Recommended::   (27° 15' 42"N, 5° 21' 26"E)

     This is 1 of 418 approved meteorites from Tamanghasset, Algeria (plus 2 unapproved names) (plus 2 impact craters)
     This is 1 of 1110 approved meteorites from Algeria (plus 27 unapproved names) (plus 4 impact craters)
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