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Calama 200
Basic information Name: Calama 200
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2021
Country: Chile
Mass:help 24 kg
Recommended:  H5    [explanation]

This is 1 of 10945 approved meteorites (plus 20 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 11 Nov 2021
Writeup from MB 110:

Calama 200        22°26.78’S, 68°46.21’W

Antofagasta, Chile

Find: 26 Mar 2021

Classification: Ordinary chondrite (H5)

History: The meteorite was found in March 26, 2021, on a surface of stony carbonate desert near Calama, Chile, by Mr. I. Chaplygin during a systematic search for meteorites. The meteorite was half buried in a soil.

Physical characteristics: Physical properties: One rounded stone of 24 kg is nearly covered by a black fusion crust with only few chippings. A stone has broad regmaglypts. The buried part o the stone is covered by a light-colored carbonate material and somewhere rusty.

Petrography: (C. A. Lorenz, Vernad) The meteorite composes of chondrules, chondrule and mineral fragments and granular recrystallized matrix matrix. Chondrules of 160-1600 µm (average 567 µm) in diameter are poorly outlined. Chondrules of PO, RO, BO, BOP, POP, PP are most present. Main phases are olivine, pyroxene, feldspar, Fe,Ni iron; minor ones are troilite, chromite and merrillite. Olivine demonstrates weak undulatory extinction. Minor Fe,Ni-hydroxides partly replace the metal grains and form thin veinlets in the near-surface part of the meteorite.

Geochemistry: Mineral compositions and geochemistry: (S. E. Borisovsky, IGEM, EMP) Olivine Fa 18.4±0.3 (N=10); pyroxene Fs15.6±0.2Wo1.16±0.3 (N=10).

Classification: Ordinary chondrite (H5), shock stage is S2, weathering is W1.

Specimens: Type specimen of 43.9 g and thin polished section are on deposit at Vernad. Mr. I. Chaplygin holds the main mass.

Data from:
  Table 0
  Line 0:
Date:26 Mar 2021
Mass (g):24000
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):18.4±0.3 (N=10)
Ferrosilite (mol%):15.6±0.2 (N=10)
Wollastonite (mol%):1.16±0.3 (N=10)
Classifier:Lorenz C. A., Vernad
Type spec mass (g):43.9
Type spec location:Vernad
Main mass:I. Chaplygin, ichap@rambler.ru
Finder:Ilya Chaplygin
Comments:field name is 110, analyst Borisovsky S.E. (IGEM, Moscow); submitted by Lorenz C. A. (Vernad.)
   and collections
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
IGEM: Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetny Per., 35, Moscow, 119017 , Russia (institutional address; updated 16 Dec 2010)
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Photos from the Encyclopedia of Meteorites:
Timur Kryachko   

     Recommended::   (22° 26' 47"S, 68° 46' 13"W)

     This is 1 of 2320 approved meteorites from Antofagasta, Chile (plus 9 unapproved names) (plus 1 impact crater)
     This is 1 of 2349 approved meteorites from Chile (plus 15 unapproved names) (plus 1 impact crater)
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