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| Caleta el Cobre 050 | |||||||||||||||||||||||||||||||||||
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| 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:  1590 g | ||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 138 approved meteorites classified as Achondrite-ung. [show all] Search for other: Achondrites, Ungrouped achondrites | ||||||||||||||||||||||||||||||||||
| Comments: | Approved 14 Nov 2020 | ||||||||||||||||||||||||||||||||||
| Writeup |
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: |
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| 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 10 Jun 2023) 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) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:
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Statistics: This is 1 of 2908 approved meteorites from Antofagasta, Chile (plus 10 unapproved names) (plus 1 impact crater) This is 1 of 2937 approved meteorites from Chile (plus 13 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||||
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