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Calama 255
Basic information Name: Calama 255
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2022
Country: Chile
Mass:help 12 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  L3
Recommended:  L3    [explanation]

This is 1 of 840 approved meteorites (plus 2 unapproved names) classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 23 Jul 2022
Writeuphelp
Writeup from MB 111:

Calama 255        22°29.01’S, 68°50.23’W

Antofagasta, Chile

Find: 30 Apr 2022

Classification: Ordinary chondrite (L3)

Petrography: The meteorite has chondritic texture and is comprised by chondrules, chondrule fragments and mineral grains with interstitial fine-grained clastic matrix impregnated by Fe-hydroxide. The chondrules are well outlined and have an average diameter 636±337 µm (N=63). The chondrules mostly are of BO, BP, PO, POP, ROP, RP types. The main phases are olivine, pyroxene, feldspatic glass, Fe,Ni iron (kamacite ant taenite) and troilite; chromite is accessory. Chondrule mesostasis is glassy. Olivine grains have sharp or weak undulatory optical extinction and rare irregular fracturing.

Geochemistry: Mineral compositions and geochemistry: Olivine Fa23.6±7.7 (N=31); PMD Fa=23.7%; Pyroxene Fs9.2±6.1 Wo1.2±1.0 (N=24)

Data from:
  MB111
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Date:30 Apr 2022
Latitude:22°29.01'S
Longitude:68°50.23'W
Mass (g):12
Pieces:1
Class:L3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):23.6±7.7 (N=31)
Ferrosilite (mol%):9.2±6.1 (N=24)
Wollastonite (mol%):1.2±1.0 (N=24)
Classifier:Lorenz C. A., Vernad
Type spec mass (g):2.8
Type spec location:Vernad.
Main mass:Mr. T. Kryachko, [email protected]
Finder:Mr. T. Kryachko
Comments:Field name is 8-51; analyst T. Kryachko (The Russian system of quality, Technograd, Moscow); submitted by Lorenz C.A., Vernad
Institutions
   and collections
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography:

Chile
Coordinates:
     Recommended::   (22° 29' 1"S, 68° 50' 14"W)

Statistics:
     This is 1 of 3417 approved meteorites from Antofagasta, Chile (plus 12 unapproved names) (plus 1 impact crater)
     This is 1 of 3446 approved meteorites from Chile (plus 13 unapproved names) (plus 1 impact crater)
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