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| In Ghar 001 | |||||||||||||||||||||||||||||||||||||||
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| 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:  5.71 kg | ||||||||||||||||||||||||||||||||||||||
| Classification history: |
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 |
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. | ||||||||||||||||||||||||||||||||||||||
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| Data from: MB111 Table 0 Line 0: |
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| Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) |
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| References: | Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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Geography:
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Statistics: 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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