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Calama 010
Basic information Name: Calama 010
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2017
Country: Chile
Mass:help 1248 g
Classification
  history:
Recommended:  H6    [explanation]

This is 1 of 5854 approved meteorites (plus 5 unapproved names) classified as H6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 11 May 2018
Writeuphelp
Writeup from MB 107:

Calama 010        22°24.643’ S, 68°34.622’ W

Antofagasta, Chile

Find: 2017 Oct 15

Classification: Ordinary chondrite (H6)

History: The meteorite was found 15 October 2017 by the UrFU meteorite expedition-2017 in Chile (Pastukhovich A.Yu., Larionov M.Yu., Kruglikov N.A., Kolunin R.N.) near Chiu-Chiu, Calama region.

Physical characteristics: The meteorite has roughly rounded shape. Exterior of the stone is desert polished. The surface and interior of the meteorite is light to dark brown in color due to Fe-hydroxides. No fusion crust was observed.

Petrography: Classification (V. V. Sharygin, SIGM and UrFU). Petrographic observation of a polished thin section shows very rare chondrules in a coarse recrystallized matrix. Chondrules are very poorly delineated with apparent size to 2 mm. The POP chondrules are common and mainly consist of olivine, low-Ca-pyroxene and plagioclase, diopside, and ±chromite and blebs of troilite and FeNi-metal. Olivine, low-Ca-pyroxene and plagioclase are main minerals in matrix. Plagioclase grains are larger than 50-100 µm. This indicates a petrological type of 6 for the meteorite. Undulatory extinction and irregular fractures in olivine, as well as the presence of opaque shock veins, indicate a shock stage of S3. Majority of grains of FeNi-metal (100-800 µm) are mainly represented by kamacite; taenite and tetrataenite are rare. Sizes of troilite grains are 50-300 µm. Weathering products (goethite, Fe-Ni-Cl-hydroxide and other Fe-Ni-hydroxides, gypsum) occur as in situ partial alteration of FeNi-metals and troilite and fill microfractures in minerals from matrix and chondrules (weathering grade – W2). Nickel (1-3 µm) was found in abundant Fe-Ni-Cl-hydroxide-goethite aggregate around tetrataenite. Pentlandite (up to 10 µm) is rarely observed in troilite. Clinopyroxene, chromite, chlorapatite and merrillite (50-300 µm) occur locally in the matrix. Opaque shock veins are locally abundant and contain troilite (±Fe-Ni-metal) blebs in fine-grained olivine-orthopyroxene±clinopyroxene aggregate.

Geochemistry: EDS-WDS analyses (V. V. Sharygin, SIGM and UrFU). The primary chondrite paragenesis includes olivine Fa19.33±0.35 (N=29), orthopyroxene Fs16.96±0.28Wo1.46±0.20 (N=25), plagioclase Ab83.9An10.5Or5.6 (N=25), Cr-bearing clinopyroxene En45.9Fs7.6Wo46.5 (N=3), chromite Crt80.4Spl14.9 (N=15), chlorapatite, merrillite, and FeNi-metals. Chlorapatite contains F (up to 1.1 wt.%); Cl – 4.87 wt.% (N=11). Merrillite is poor in FeO (0.5-0.9 wt.%, N=12). Composition of metals (in wt.%): kamacite (N=23) – Fe 92.85±0.41, Ni – 6.60±0.42, Co – 0.84±0.09; taenite (N=43) – Fe 60.31, Ni 39.38, Co 0.28; tetrataenite (N=1) – Fe 50.55, Ni 49.17, Co 0.14. Fe-Ni-Cl-hydroxide (N=5, in wt.%): FeO - 59.37, NiO – 11.91, CoO – 0.75, Cl – 16.83.

Classification: Ordinary chondrite. H6, S3, W2.

Specimens: 1189.29 g (18 pieces) at UrFU; 53.8 g sample and thin section at SIGM.

Data from:
  MB107
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Origin or pseudonym:limestone deflation plain
Date:2017 Oct 15
Latitude:22°24.643' S
Longitude:68°34.622' W
Mass (g):1248.18
Pieces:19
Class:H6
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):19.3±0.4 (N=29)
Ferrosilite (mol%):17.0±0.3 (N=25)
Wollastonite (mol%):1.5±0.2 (N=25)
Classifier:V. V. Sharygin, SIGM and UrFU
Type spec mass (g):1189.29
Type spec location:UrFU
Main mass:UrFU
Finder:UrFU meteorite expedition - Chile-2017
Comments:Field name Kol-2; analyst V.V. Sharygin (SIGM and UrFU); submitted by Victor V. Sharygin, sharygin@igm.nsc.ru
Institutions
   and collections
UrFU: Ural Federal University, 620002, 19 Mira street, Ekaterinburg, Russia (institutional address; updated 14 Jan 2015)
SIGM: V.S. Sobolev Institute of Geology and Mineralogy SB RAS, pr. Akademika Koptyuga, 3 Novosibirsk, 630090, Russia; Website (institutional address; updated 10 May 2017)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
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Photos:
CreditPhotos
Public domain photographs:
Victor V. Sharygin   
Geography:

Chile
Coordinates:
     Recommended::   (22° 24' 39"S, 68° 34' 37"W)

Statistics:
     This is 1 of 1433 approved meteorites from Antofagasta, Chile (plus 5 unapproved names) (plus 1 impact crater)
     This is 1 of 1460 approved meteorites from Chile (plus 11 unapproved names) (plus 1 impact crater)
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