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Calama 029
Basic information Name: Calama 029
     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 590 g
Classification
  history:
Recommended:  LL7    [explanation]

This is 1 of 60 approved meteorites classified as LL7.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 4 Jul 2019
Writeuphelp
Writeup from MB 108:

Calama 029        22°24’355"S, 068°34’401"W

Antofagasta, Chile

Find: 2017 Oct 14

Classification: Ordinary chondrite (LL7)

History: Meteorite (590 g) was found 14 October 2017 by the UrFU meteorite expedition-2017 in Chile (Pastukhovich A. Yu., Larionov M. Yu., Kruglikov N.A., Kolunin R.N.) near Calama.

Petrography: Classification (S. Berzin and K. Dugushkina, RAS-UB). Petrographic observation of a polished thin section revealed a fine-grained recrystallized texture and one relict chondrule. The meteorite consists of olivine 65%, orthopyroxene 15%, clinopyroxene 5-7%, plagioclase 10%, chromite 2-3%, troilite 3-4%, Fe-Ni-metal <0.5%. Also contains accessory apatite and ilmenite. Olivine grains are 50-300 µm in size, however large olivine grains up to 800 µm are present. Such olivine grains contain plagioclase, troilite and metal inclusions. One relict barred olivine (BO) chondrule was found in thin section. This chondrule has recrystallized boundaries and contains orthopyroxene and clinopyroxene. This indicates intense recrystallizaton. Optical features (sharp extinction of olivine) indicate that the sample is very weakly or not shocked (S1). There is oxidation of metal and troilite, and incipient alteration of mafic silicates.

Geochemistry: EDX analyses and electron microprobe analyses by S. Berzin, K. Dugushkina and I. Danilenko, RAS-UB, analyses Cu isotope composition by M. Chervyakovskaya, RAS-UB. The primary paragenesis includes olivine Fa31±1.5 (N=15), orthopyroxene En73±0.6Fs25±0.6Wo2±0.2 (N=12), plagioclase An20±0.7 (N=9), clinopyroxene En45±1.0Fs11±2.2Wo44±1.2 (N=9), chromite, ilmenite, chlor-apatite, troilite and FeNi-metal. Olivine contains MnO 0.4 wt.%. Plagioclase contains K2O 0.6-1.3 wt.%. The average composition of chromite (N=4): Cr2O3 53.39±0.43%, TiO2 3.77±0.08%, Al2O3 5.17±0.04%, FeO 33.30±0.35%, MgO 1.67±0.07%, MnO 0.43±0.07%, V2O3 0.71±0.03%, ZnO 0.33±0.07%. The average composition of FeNi-metal (N=5): Fe 49.4±1.5%, Ni 49.0±1.5 %, Co 1.99±0.16%.

Classification: Ordinary chondrite (LL7). This meteorite has a small content of FeNi-metal (<0.5%) compared to most LL chondrites.

Specimens: Main mass 580 g and 10 g cut-offs, plus a thin section, UrFU.

Data from:
  MB108
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Origin or pseudonym:limestone deflation plain
Date:2017 Oct 14
Latitude:22°24'355"S
Longitude:068°34'401"W
Mass (g):590
Pieces:1
Class:LL7
Shock stage:S1
Weathering grade:moderate
Fayalite (mol%):31±1.5 (N=15)
Ferrosilite (mol%):25±0.6 (N=12)
Wollastonite (mol%):2±0.2 (N=12)
Classifier:S. Berzin and K. Dugushkina, RAS-UB
Type spec mass (g):590
Type spec location:UrFU
Main mass:UrFU
Finder:UrFU meteorite expedition - Chile-2017 (Pastukhovich A.Yu., Larionov M.Yu., Kruglikov N.A., Kolunin R.N.).
Comments:Field name Kol-1; submitted by Stepan V. Berzin sbersin@ya.ru
Institutions
   and collections
UrFU: Ural Federal University, 620002, 19 Mira street, Ekaterinburg, Russia (institutional address; updated 14 Jan 2015)
RAS-UB: Zavaritsky Institute of Geology and Geochemistry Russian Academy of Sciences, Ural Branch 15 Akademika Vonsovskogo str., Ekaterinburg, 620016, Russia (institutional address; updated 19 Apr 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
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Photos:
CreditPhotos
Public domain photographs:
Stepan V. Berzin      
Geography:

Chile
Coordinates:
     Recommended::   (22° 29' 55"S, 68° 40' 41"W)

Statistics:
     This is 1 of 1417 approved meteorites from Antofagasta, Chile (plus 5 unapproved names) (plus 1 impact crater)
     This is 1 of 1444 approved meteorites from Chile (plus 11 unapproved names) (plus 1 impact crater)
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