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El Médano 398
Basic information Name: El Médano 398
     This is an OFFICIAL meteorite name.
Abbreviation: EM 398
Observed fall: No
Year found: 2017
Country: Chile
Mass:help 165 g
Classification
  history:
Recommended:  CO3    [explanation]

This is 1 of 515 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 27 Mar 2019
Writeuphelp
Writeup from MB 108:

El Médano 398 (EM 398)        24°51’S, 70°32’W

Antofagasta, Chile

Find: 2017 Jun 19

Classification: Carbonaceous chondrite (CO3)

Physical characteristics: Dark stone. Cut surface reveals dark interior and fresh metal.

Petrography: Chondrite with small chondrules (~200 μm) set in an abundant fine-grained iron-rich matrix. Opaque minerals are mostly FeNi.

Geochemistry: Olivine Fa14.5±5.7, Fa PMD 97%, range Fa0.8-44.5 (n=8). Cr2O3 in ferroan olivine 0.11±0.04 wt% (n=4). Orthopyroxene Fs1.4Wo1.1 (n=1). Defocused matrix analyses FeO 40.0 wt%, total 95.3 wt%. Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.38.

Classification: Carbonaceous chondrite (CO3)

Specimens: Type specimen at CEREGE. Main mass at MMC.

Data from:
  MB108
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Date:2017 Jun 19
Latitude:24°51'S
Longitude:70°32'W
Mass (g):165
Pieces:1
Class:CO3
Weathering grade:moderate
Fayalite (mol%):14.5±5.7 (n=8)
Ferrosilite (mol%):1.4 (n=1)
Wollastonite (mol%):1.1
Magnetic suscept.:4.38
Classifier:J. Gattacceca, L. Krämer Ruggiu, CEREGE
Type spec mass (g):21
Type spec location:CEREGE
Main mass:MMC
Finder:Rogrido Martinez
Comments:work name RM612; 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. 108, in preparation (2019)
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Geography:

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

Statistics:
     This is 1 of 1417 approved meteorites from Antofagasta, Chile (plus 5 unapproved names) (plus 1 impact crater)
     This is 1 of 1444 approved meteorites from Chile (plus 11 unapproved names) (plus 1 impact crater)
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