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El Médano 209
Basic information Name: El Médano 209
     This is an OFFICIAL meteorite name.
Abbreviation: EM 209
Observed fall: No
Year found: 2011
Country: Chile
Mass:help 9.7 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2014)  CO3
Recommended:  CO3    [explanation]

This is 1 of 477 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 18 Nov 2013
Writeuphelp
Writeup from MB 102:

El Médano 209        ~24°51’S, ~70°32’W

Antofagasta, Chile

Found: 2011 Oct 24

Classification: Carbonaceous chondrite (CO3)

History: A single dark stone was found in the Atacama desert by Cécile Cournède in October 2011.

Petrography: (J. Gattacceca, CEREGE) Abundant chondrules, predominantly of type I in a dark matrix. Chondrule:matrix ratio is ~1:1. Olivine in type I chondrules is zoned. Chondrule size ranges from <100 μm to 500 μm, with an average 224±82 μm (N=31).

Geochemistry: Olivine in the range Fa0.4-36.9 (mean Fa7.5±12.0, PMD=112%, N=14). Low-Ca pyroxene Fs7.5±4.4 Wo2.4±1.3 (N=6). Cr2O3 in ferroan olivine is 0.15±0.26 wt% (N=8). Magnetic susceptibility log χ = 4.36 (c in 10-9 m3/kg).

Classification: Carbonaceous chondrite (CO3). Strong weathering.

Specimens: Type specimen (4 g) and main mass at CEREGE.

Data from:
  MB102
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Origin or pseudonym:deflation surface
Date:2011 Oct 24
Latitude:~24°51'S
Longitude:~70°32'W
Mass (g):9.7
Pieces:1
Class:CO3
Weathering grade:high
Fayalite (mol%):7.5±12.0 (N=14)
Ferrosilite (mol%):7.5±4.4 (N=6)
Wollastonite (mol%):2.4±1.3 (N=7)
Magnetic suscept.:4.36
Classifier:J. Gattacceca, A. Hutzler, CEREGE
Type spec mass (g):4
Type spec location:CEREGE
Main mass:CEREGE
Finder:Cécile Cournède
Comments:Submitted by J. 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 9 Mar 2016)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Geography:

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

Statistics:
     This is 1 of 987 approved meteorites from Antofagasta, Chile (plus 1 impact crater)
     This is 1 of 1012 approved meteorites from Chile (plus 9 unapproved names) (plus 1 impact crater)
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