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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:
Recommended:  L3    [explanation]

This is 1 of 789 approved meteorites (plus 1 unapproved name) 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, bredfild@mail.ru
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 Meteoritical Bulletin, no. 111, in preparation (2022)
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Geography:

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