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Sahara 03500 | |||||||||||||||||||||||
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Basic information | Name: Sahara 03500 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2003 Country: (Sahara) Mass: 221 g | ||||||||||||||||||||||
Classification history: |
This is 1 of 149 approved meteorites classified as Achondrite-ung. [show all] Search for other: Achondrites, Ungrouped achondrites | ||||||||||||||||||||||
Writeup |
Writeup from MB 88:
Sahara 03500 Found 2003 May Achondrite (ungrouped) In May 2003, a dark 221.33 g stone was discovered in the Sahara by a person prospecting for meteorites, acting on behalf of Caillou Noir. The rock is light gray-green, fine-grained, and displays dark globules of a few mm to cm with rusty rims. Cracked fusion crust (dark greenish brown) and a deep regmaglyt on one side, broken on the other side with desert alteration. Petrography and mineralogy (A. Jambon and O Boudouma, UPVI; and B. Devouard, UBP): Magmatic texture of orthopyroxene and olivine with interstitial glass. A few rounded metal-sulfide globules (~16% vol.), 0.5-10 mm, are dispersed in this silicate "matrix". Glomerocrysts of pyroxene ~50-300 µm, En77Fs20Wo3, FeO/MnO = 27.8±0.4.. Fine rims of clinopyroxene (En50Fs14Wo36) where in contact with the glass phase. Slightly zoned olivine, 20-50 µm, Fo81 to Fo76, FeO/MnO = 45.5 ±0.6. Interstitial glass (c. 15 % vol.) close to feldspathic composition (c. Ab17An4Or13Qz65). Very minor Fe sulfide grains (<5 µm) in the glass phase or between crystals. Metal-sulfide globules consist of dendritic metal in pyrrhotite (coarse texture, visible with the naked eye). Metal grains have discontinuous rims of Fe-Ni phosphide, and display a fine-grained texture with irregular exsolutions of taenite. Smaller globules (<500 μm; Fe= 89 %, Ni=9-10 %, P= 0.5-1.5 %) consist of kamacite with phosphide and taenite exsolution, surrounded by pyrrhotite. The rock is highly fractured, with secondary veins of Ca-carbonate of probable terrestrial origin. Minor oxydation is visible around the metal-sulfide globules (W1). Specimens: type specimens: UPVI 21.36 g, Université de Clermont III: 2.0 g; main mass: Caillou Noir. | ||||||||||||||||||||||
Data from: MB88 Table 1 Line 13: |
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Institutions and collections |
UPVI: Université Pierre et Marie Curie (Paris VI),Case 110, 4 Place Jussieu, 75005 Paris, France (institutional address; updated 5 Oct 2014) Caillou Noir: Caillou Noir 100 Chemin des Campenes, 74400 Chamonix, France; Website (private address) MFranco: Michel Franco (of Caillou Noir), 100 Chemin des Campenes 74400 Les Praz de Chamonix, France; Website (private address) UBP: Universite Blaise Pascal, Clermont-Ferrand, France (institutional address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 88, MAPS 39, A215-A272 (2004)
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Photos: |
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Geography: |
Statistics: This is 1 of 1037 approved meteorites from (Sahara) (plus 1 unapproved name) | ||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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