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El Médano 390
Basic information Name: El Médano 390
     This is an OFFICIAL meteorite name.
Abbreviation: EM 390
Observed fall: No
Year found: 2017
Country: Chile
Mass:help 132 g
Classification
  history:
Recommended:  CO3    [explanation]

This is 1 of 496 approved meteorites classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 3 Aug 2018
Writeuphelp
Writeup from MB 107:

El Médano 390 (EM 390)        ~24°51’S, ~70°32’W

Antofagasta, Chile

Find: 2017 May 17

Classification: Carbonaceous chondrite (CO3)

History: The meteorite was found in May 2017 in the Atacama desert by Rodrigo Martinez while he was looking for meteorites

Petrography: (J. Gattacceca, CEREGE) Chondrules (predominantly of type I) and small CAIs set in a fine-grained Fe-rich matrix. Average chondrule apparent size about 250 μm. Opaques are metal and troilite.

Geochemistry: Olivine in the range Fa0.5-34.4 mean Fa18.0±15.6, N=4). Cr2O3 in ferroan olivine 0.07±0.01 wt.% (N=3). Low-Ca pyroxene Fs1.01Wo4.0 (N=1). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.63.

Classification: Carbonaceous chondrite (CO3). Moderate weathering

Specimens: 20 g and a polished section at CEREGE. Main mass at MMC.

Data from:
  MB107
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Origin or pseudonym:deflation surface
Date:2017 May 17
Latitude:~24°51'S
Longitude:~70°32’W
Mass (g):132
Pieces:1
Class:CO3
Weathering grade:moderate
Fayalite (mol%):18.0±15.6 (N=4)
Ferrosilite (mol%):1.0 (N=1)
Wollastonite (mol%):4.0
Magnetic suscept.:4.63
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):20.2
Type spec location:CEREGE
Main mass:MMC
Finder:Rodrigo Martinez
Comments:work name RM598; submitted by Jérôme Gattacceca
Institutions
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Europole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 5 Apr 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
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Geography:

Chile
Coordinates:
     Recommended::   (24° 51'S, 70° 32'W)

Statistics:
     This is 1 of 1181 approved meteorites from Antofagasta, Chile (plus 1 impact crater)
     This is 1 of 1208 approved meteorites from Chile (plus 6 unapproved names) (plus 1 impact crater)
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