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Caleta el Cobre 050
Basic information Name: Caleta el Cobre 050
     This is an OFFICIAL meteorite name.
Abbreviation: CeC 050
Observed fall: No
Year found: 2020
Country: Chile
Mass:help 1590 g
Classification
  history:
Recommended:  Achondrite-ung    [explanation]

This is 1 of 101 approved meteorites classified as Achondrite-ung.   [show all]
Search for other: Achondrites, Ungrouped achondrites
Comments: Approved 14 Nov 2020
Writeuphelp
Writeup from MB 109:

Caleta el Cobre 050 (CeC 050)        24°15’S, 70°31’W

Antofagasta, Chile

Find: 2020 Apr 27

Classification: Ungrouped achondrite

Physical characteristics: Single brownish stone. Cut surface reveals a coarse crystalline interior with green (low-Ca pyroxene) and white (plagioclase) crystals. Some pyroxene are stained with rust. Ductile deformation is visible at cm scale.

Petrography: (J. Gattacceca, CEREGE) Fractured but unbrecciated igneous rock with triple junctions. Grain size 300 µm. Main minerals are plagioclase and low-Ca pyroxene in similar abundances. Opaque minerals are kamacite and troilite, found as small grains or along grain rims. A few pyroxene grains are exsolved and contain ~10 µm kamacite grains associated with the exsolutions.

Geochemistry: Plagioclase An57.0±3.8Ab42.6±3.8Or0.3±0.1 (n=4). Pyroxenes: low-Ca pyroxene Fs5.8±0.2Wo2.3±0.1 (n=4), augite Fs2.4±0.0Wo45.9±0.2 (n=2), FeO/MnO = 4.59±0.75 (n=6). Oxygen isotopic composition (J. Gattacceca, C. Sonzogni, CEREGE) from analysis of one 1.5 mg aliquot of a powdered 353 mg bulk sample is δ17O=3.48‰, δ18O=8.28‰ , Δ17O=-0.83‰ (slope 0.52, analytical uncertainties 0.08‰, 0.12‰, 0.01‰ respectively).

Classification: Achondrite-ungrouped. The ungrouped designation is based on the oxygen isotopic composition, mineralogy and mineral chemistry.

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

Data from:
  MB109
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Date:2020 Apr 27
Latitude:24°15'S
Longitude:70°31'W
Mass (g):1590
Pieces:1
Class:Achondrite-ung
Weathering grade:low
Ferrosilite (mol%):5.8±0.2 (n=4)
Wollastonite (mol%):2.3±0.1
Magnetic suscept.:4.67
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):34
Type spec location:CEREGE
Main mass:MMC
Finder:Rodrigo Martinez
Comments:work name RM714; submitted by Jérôme Gattacceca
Plots: O isotopes:  
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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Photos:
CreditPhotos
Public domain photographs:
Jerome Gattacceca      
Geography:

Chile
Coordinates:
     Recommended::   (24° 15'S, 70° 31'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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