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| El Médano 056 | |||||||||||||||||||||||||||||||||||||
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| Basic information | Name: El Médano 056 This is an OFFICIAL meteorite name. Abbreviation: EM 056 Observed fall: No Year found: 2011 Country: Chile Mass:  180 g | ||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 205 approved meteorites classified as CK5. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites | ||||||||||||||||||||||||||||||||||||
| Comments: | Approved 23 Oct 2012 | ||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 101:
El Médano 056 24°51’S, 70°32’W Antofagasta, Chile Found: 2011 Apr 6 Classification: Carbonaceous chondrite (CK5) History: A single stone was found on a deflation surface in the Atacama desert, Chile, by Rodrigo Martinez in April 2011. Physical characteristics: A single stone of 180 g entirely covered by matte fusion crust. The interior has a black color. Petrography: (J. Gattacceca, CEREGE) Recrystallized texture with chondrules. Abundant olivine, pyroxene, plagioclase. Opaque phases are mainly magnetite and sulfides. Geochemistry: Olivine and pyroxene are equilibrated. Olivine Fa30±1.1 has low MnO content (mean FeO/MnO=103). low-Ca pyroxene Fs24.9±0.1, Wo0.7±0.1, Ca-pyroxene Fs10.8Wo44.4. All silicates contain NiO: olivine mean NiO 0.77 wt.%, low Ca-pyroxene mean NiO 0.17 wt.%, Ca-pyroxene mean NiO 0.55 wt.%. Magnetite Cr2O3=3.9 wt%, Al2O3=0.48wt%, NiO=0.22 wt%. Magnetic susceptibility log χ = 4.51 (χ in 10-9 m3/kg). Classification: Carbonaceous chondrite (CK5). Low degree of weathering. Specimens: 20 g and one polished section on deposit at CEREGE. Main mass with MMC. | ||||||||||||||||||||||||||||||||||||
| Data from: MB101 Table 0 Line 0: |
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| Institutions and collections |
CEREGE: CEREGE
BP 80
Avenue Philibert, Technopole de l'Arbois
13545 Aix-en-Provence Cedex 4
France, France (institutional address; updated 29 Oct 2018) MMC: Museo del Meteorito, Tocopilla 401, San Pedro de Atacama, Chile. or Alonso de Ercilla 1250, La Herradura, Coquimbo, Chile, Chile; Website (institutional address; updated 11 Mar 2014) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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Geography:
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Statistics: This is 1 of 2687 approved meteorites from Antofagasta, Chile (plus 9 unapproved names) (plus 1 impact crater) This is 1 of 2716 approved meteorites from Chile (plus 15 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||||||
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