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| El Médano 496 | |||||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: El Médano 496 This is an OFFICIAL meteorite name. Abbreviation: EM 496 Observed fall: No Year found: 2019 Country: Chile Mass:  275 g | ||||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 8890 approved meteorites (plus 5 unapproved names) classified as L5. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||||||||||
| Comments: | Approved 19 Mar 2022 | ||||||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 111:
El Médano 496 (EM 496) 24°37.044’S, 70°18.414’W Antofagasta, Chile Find: 2019 Nov 20 Classification: Ordinary chondrite (L5) History: While searching for meteorites, Vincent Stelluti recovered this stone on a slope of about 5% and composed of gravel, stones and sand. The stone was sunk into the ground about 2 cm. Physical characteristics: A brown to dark brown stone with a roughly conical shape but with part of the cone missing. Fusion crust covers about 60% of the surface, with some regmaglypts and several cracks present. Physical properties: Bulk density: 3.38±0.03 g/cm3; Grain density: 3.35 ± 0.01 g/cm3; porosity zero; magnetic susceptibility log χ (× 10-9 m3/kg) = 4.65. Petrography: Cut surfaces show metal distributed in blebs and veins of cm length. In polished thin section, chondrules are poorly discernable and matrix is recrystallized; silicates show pervasive Fe-staining. Chondrules are typically fragmented with few complete. Thin dark veins with sharp contacts connect between localized dark patches that appear to be melt pockets in the silicates. Metal occurs interstitially between silicates or in small veins. Olivine shows mosaic extinction and planar fractures. Geochemistry: EPMA: olivine Fa24.66±0.50 (n=13); Ca-poor pyroxene Fs20.62±0.56Wo1.48±0.40 (n=5); Ca-poor pyroxene Wo44.97±0.84Fs8.01±1.19 (n=3) Classification: Ordinary chondrite: L5 (S4) W2. Olivine and metal textures, as well as presence of melt pockets and shock veins are consistent with moderate to high shock metamorphism. Specimens: Type specimen: UWO; Main mass V. Stelluti | ||||||||||||||||||||||||||||||||||||||||
| Data from: MB111 Table 0 Line 0: |
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| Institutions and collections |
UWO: University of Western Ontario, Department of Earth Sciences, BGS 1026, 1151 Richmond St. N, London, Ontario, Canada N6A 5B7, Canada (institutional address; updated 18 Jul 2015) |
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| Catalogs: |
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| References: | Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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| Photos: |
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Geography:
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Statistics: This is 1 of 3440 approved meteorites from Antofagasta, Chile (plus 12 unapproved names) (plus 1 impact crater) This is 1 of 3469 approved meteorites from Chile (plus 13 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||||||||||
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| Also see: |
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| Revision history: |
This lists important revisions made to data for this record.
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