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El Médano 464
Basic information Name: El Médano 464
     This is an OFFICIAL meteorite name.
Abbreviation: EM 464
Observed fall: No
Year found: 2019
Country: Chile
Mass:help 7.09 kg
Classification
  history:
Recommended:  CO3    [explanation]

This is 1 of 563 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 14 Nov 2020
Writeuphelp
Writeup from MB 109:

El Médano 464 (EM 464)        24°51’S, 70°32’W

Antofagasta, Chile

Find: 2019 Jan 09

Classification: Carbonaceous chondrite (CO3)

Physical characteristics: Single brown stone.

Petrography: (J. Gattacceca, CEREGE) Chondrite with well-defined chondrules (average apparent diameter ~200 µm) and CAIs (to 500 µm) set in abundant fine-grained iron-rich matrix. Opaque minerals are mostly kamacite.

Geochemistry: Olivine Fa22.7±12.9, range Fa0.3-39.7, Fa PMD = 46% (n=8), Cr2O3 in ferroan olivine 0.09±0.03 wt% (n=7). Low-Ca pyroxene Fs1.6±0.7 (n=2).

Classification: Carbonaceous chondrite (CO3). Likely paired with El Médano 216.

Data from:
  MB109
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Date:2019 Jan 09
Latitude:24°51'S
Longitude:70°32'W
Mass (g):7090
Pieces:1
Class:CO3
Weathering grade:low
Fayalite (mol%):22.7±12.9 (n=8)
Ferrosilite (mol%):1.6 (n=2)
Wollastonite (mol%):0.7
Magnetic suscept.:4.43
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):86
Type spec location:CEREGE
Main mass:MMC
Finder:Rodrigo Martinez
Comments:work name RM664; submitted by Jérôme Gattacceca
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:

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

Statistics:
     This is 1 of 1827 approved meteorites from Antofagasta, Chile (plus 5 unapproved names) (plus 1 impact crater)
     This is 1 of 1855 approved meteorites from Chile (plus 11 unapproved names) (plus 1 impact crater)
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