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El Médano 465
Basic information Name: El Médano 465
     This is an OFFICIAL meteorite name.
Abbreviation: EM 465
Observed fall: No
Year found: 2019
Country: Chile
Mass:help 5.23 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 465 (EM 465)        24°51’S, 70°32’W

Antofagasta, Chile

Find: 2019 Jan 10

Classification: Carbonaceous chondrite (CO3)

Physical characteristics: Single brown stone.

Petrography: (J. Gattacceca, CEREGE) Chondrite with well-defined chondrules (average apparent diameter 200±80 µm, n=26) and CAIs (to 600 µm) set in abundant (31 vol%) fine-grained iron-rich matrix. Opaque minerals are mostly kamacite.

Geochemistry: Olivine Fa27.1±16.5, range Fa4.8-53.1, Fa PMD = 54%, Cr2O3 0.08±0.04 (n=25). Low-Ca pyroxene Fs1.5±0.1Wo1.5±0.8 (n=7). Ca-pyroxene Fs33.1Wo51.0 (n=1).

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

Data from:
  MB109
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Date:2019 Jan 10
Latitude:24°51'S
Longitude:70°32'W
Mass (g):5225
Pieces:1
Class:CO3
Weathering grade:moderate
Fayalite (mol%):27.1±16.5 (n=25)
Ferrosilite (mol%):1.5±0.1 (n=7)
Wollastonite (mol%):1.5±0.8
Magnetic suscept.:4.40
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):34
Type spec location:CEREGE
Main mass:MMC
Finder:Rodrigo Martinez
Comments:work name RM667; 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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