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In Ghar 001
Basic information Name: In Ghar 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2022
Country: Algeria
Mass:help 5.71 kg
Recommended:  Winonaite    [explanation]

This is 1 of 79 approved meteorites (plus 1 unapproved name) classified as Winonaite.   [show all]
Search for other: Primitive achondrites, Winonaites
Comments: Approved 11 Dec 2022
Writeup from MB 111:

In Ghar 001        27°10.57’N, 2°05.8233’E

Tamanghasset, Algeria

Find: 2021

Classification: Primitive achondrite (Winonaite)

History: A single stone with a high iron content, was found by a person was working his land (20 km NE of In Ghar) between the Algerian villages of In Ghar and In Salah. A subsequent search by Yahdih Buhali Omar and associates recovered several kilos of this material (1 g - 2.9 kg). Adrián Contreras Gómez (CRATER meteorites), purchased the samples in Algeria on February 22, 2022.

Physical characteristics: Dark-brown fusion crust coats a portion of the sample. The back side of the sample has a large area of exposed FeNi that covers half the surface. The cut face shows the sample is a crystalline mixture of FeNi metal grains and coarse-grained silicates.

Petrography: Description and classification (A. Love, App) Sample shows poikiloblastic texture composed of (vol%): 0.5mm-cm-sized enstatite (35) and high Ca pyroxene (9) oikocrysts enclosing 165 μm (ave. grainsize) olivine chadacrysts (32), anhedral twinned albitic plagioclase (15); FeNi metal (6); troilite (3). Olivine also occurs in lumps of equigranular grains interstitial to oikocrysts. Additional minerals are: graphite (associated with silicates and metals), schreibersite, apatite. materials and 8 vol% FeNi metal. Secondary plagioclase has an average grainsize of 88 μm, n=14. Additional minerals are: high Ca pyroxene, chromite, troilite and merrillite.

Geochemistry: (A. Love, App) Olivine (Fa4.0±0.1, Fe/Mn=22.3±1.8, n=10), enstatite (Fs4.7±0.2Wo1.5±0.2, Fe/Mn=14.9±1.2, n=21); high Ca pyroxene (Fs1.6±0.2Wo44.6±0.2, Fe/Mn=11.9±4.0, n=6), plagioclase (An21.4±0.5Or2.6±0.1, n=5).

Classification: Primitive achondrite (Winonaite) Based on abundance of metal and composition of silicates, sample is a winonaite. Grainsize and texture are comparable to Hammadah al Hamra 193 (Floss et al., 2007).

Specimens: Adrián Contreras Gómez (CRATER meteorites) holds the main masses. A 27.93 g individual 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:
Place of purchase:Algeria
Mass (g):5712
Shock stage:U-S2
Weathering grade:low
Fayalite (mol%):4.0±0.1
Ferrosilite (mol%):4.7±0.2; 1.6±0.2
Wollastonite (mol%):1.5±0.2; 44.6±0.2
Magnetic suscept.:5.41
Classifier:A. Love, App
Type spec mass (g):27.93
Type spec location:App
Main mass:Adrián Contreras Gómez (CRATER meteorites)
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 Meteoritical Bulletin, no. 111, in preparation (2022)
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     Recommended::   (27° 10' 34"N, 2° 5' 49"E)

     This is 1 of 421 approved meteorites from Tamanghasset, Algeria (plus 2 unapproved names) (plus 2 impact craters)
     This is 1 of 1270 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)
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