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| Errachidia 002 | |||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Errachidia 002 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2017 Country: Morocco Mass:  21.3 g | ||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 400 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||||||||
| Comments: | Approved 31 Aug 2018 | ||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 107:
Errachidia 002 31°52’03.4"N, 4°09’55.2"W Draâ-Tafilalet, Morocco Find: 2017 Classification: HED achondrite (Eucrite, polymict) History: (H. Chennaoui Aoudjehane, FSAC) Found in a flat area SE of Errachidia called An-Nebch around 8 km NE of a Jramena village. A single piece of 4.02 g was collected on 11 Oct 2017 in the field during a systematic prospecting mission by a team of PhD students (FSAC) with H. Chennaoui. This area was selected because of the report of the first sample 17.24 g that was found there by a hunter on January 2017. Physical characteristics: (H. Chennaoui Aoudjehane) One stone partially covered by a shiny fusion crust. Fresh pieces showing a low weathering grade. Clear grains of a small size (up to 1 mm) are visible through the fusion crust. The fractured face shows brecciation with dark and clear areas. Up to 1 mm sized grains of fresh unoxidized metal are present in the cut portion. Petrography: (T. Shisseh, FSAC; R. Hewins, S. Pont, MNHNP) Breccia with rock fragments up to 0.7 mm and lithic clasts up to 1 mm embedded in a fine grained clastic matrix. Grains of exsolved low-Ca pyroxene with up to 16 μm exsolution lamellae, fractured with a 6 μm displacement and distorted, are present in the lithic clasts and the matrix. Contains shock veins up to 0.2 mm with entrained rounded grains of pyroxene, plagioclase and silica. A faulting surface was also observed extending over 1.5 mm. The main minerals are Ca-poor pyroxene, augite and plagioclase, with minor silica, ilmenite, chromite and pure Fe-metal. Geochemistry: Mineral compositions and geochemistry: (T. Shisseh, H. Chennaoui Aoudjehane, FSAC) Orthopyroxene compositions are En37.9Fs59.5Wo2.6, low-Ca pyroxenes En32.7Fs61.8Wo5.6 to En31.2Fs59.3Wo18.3 (N=7), augite En51.9Fs27.2Wo20.9 to En26.9Fs29.8Wo43.4 (N=4) Fe/Mn=30 in average. Plagioclase is An95.2-87.9 Ab4.64-11.7 Or0.12-0.5 (N=6). Classification: (H. Chennaoui Aoudjehane, T. Shisseh, FSAC) Polymict eucrite breccia. The meteorite contains anorthite, and pyroxene with Fe/Mn ratios matching eucrite, plus typical eucrite textures. Specimens: The main mass 17.24 g is held by a private collector. The type specimen consists of 4.4 g and one polished section in FSAC. | ||||||||||||||||||||||||||||||||||||
| Data from: MB107 Table 0 Line 0: |
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| Institutions and collections |
MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address) FSAC: Universite Hassan II Casablanca, Faculte des Sciences Ain Chock, Departement de Géologie, BP 5366 Maârif, Casablanca, Morocco (institutional address; updated 9 Jan 2013) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography:
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Statistics: This is 1 of 2 approved meteorites from Draâ-Tafilalet, Morocco This is 1 of 2012 approved meteorites from Morocco (plus 35 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||||||
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