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Calama 199
Basic information Name: Calama 199
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2020
Country: Chile
Mass:help 295 g
Classification
  history:
Recommended:  CK3    [explanation]

This is 1 of 71 approved meteorites classified as CK3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites
Comments: Approved 12 Feb 2022
Writeuphelp
Writeup from MB 111:

Calama 199        22°19’02"S, 68°41’50"W

Antofagasta, Chile

Find: 2020

Classification: Carbonaceous chondrite (CK3)

History: The stone was found by Dario Ruiz in the Atacama desert in 2021

Physical characteristics: Black stone. Cut face reveals a dark-gray interior with mm-sized chondrules and CAIs set in an abundant brown matrix.

Petrography: (J. Gattacceca, CEREGE) Chondrite with mm-sized chnodrules and mm-sized CAIs set in about 50 vol% of recrystallized matrix. Olivine is the dominant mineral. Olivine in chondrules is zoned with Fe-poor cores. Plagioclase in the matrix are up to 100 µm. Magnetite is abundant. Rare sulfides, to 2 µm, associated with magnetite.

Geochemistry: Matrix olivine Fa31.9±1.3, NiO 0.31±0.13 wt% (n=5). Chondrule olivine Fa22.4±9.0, range Fa5.3-32.0, Fa PMD 36%, NiO 0.21±0.14 wt% (n=11). Ca-pyroxene Fs1.2±0.3Wo37.2±2.4 (n=3). Low-Ca pyroxene Fs4.2Wo3.2 (n=1). Plagioclase An19.7Ab74.9Or5.3 (n=1). Magnetite Cr2O3 content is 3.56±0.35 wt%.

Classification: Carbonaceous chondrite (CK3). CK group based on mineralogy, texture and Cr content of magnetite. Type 3 based on the unequilibrated chondrule olivine contrasting with the recrystallized matrix that has almost equilibrated olvine and contains plagioclase, as described in Torrano et al. (2020).

Specimens: Type specien at CEREGE. Main mass with Dario Ruiz.

Bibliography:
  • Torrano Z. A., Davidson J. and Wadhwa M. (2020) A reclassification of Northwest Africa 2900 from CV3 to CK3 chondrite. Meteorit. Planet. Sci. 55, 2539–2550. (link)
Data from:
  MB111
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Date:2020
Latitude:22°19'02"S
Longitude:68°41'50"W
Mass (g):295
Pieces:1
Class:CK3
Weathering grade:moderate
Fayalite (mol%):22.4±9.0 (n=11)
Ferrosilite (mol%):4.2 (n=1)
Wollastonite (mol%):3.2
Magnetic suscept.:4.59
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):21
Type spec location:CEREGE
Main mass:Dario Ruiz
Finder:Dario Ruiz
Comments:work name DZ108; 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
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Geography:

Chile
Coordinates:
     Recommended::   (22° 19' 2"S, 68° 41' 50"W)

Statistics:
     This is 1 of 2272 approved meteorites from Antofagasta, Chile (plus 8 unapproved names) (plus 1 impact crater)
     This is 1 of 2301 approved meteorites from Chile (plus 15 unapproved names) (plus 1 impact crater)
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