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Calama 286
Basic information Name: Calama 286
     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 3.8 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2023)  H3
Recommended:  H3    [explanation]

This is 1 of 710 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 4 Mar 2023
Writeuphelp
Writeup from MB 112:

Calama 286        22°29.71’S, 68°46.36’W

Antofagasta, Chile

Find: 20 Nov 2022

Classification: Ordinary chondrite (H3)

Petrography: The meteorite has chondritic structure and is composed of distinct chondrules (D=286±227 µm, N=100), chondrule fragments and mineral grains cemented by fine-grained clastic matrix impregnated by Fe,Ni hydroxide. Chondrules are of PO, POP, RP, GO, rare BO and CC types. Chondrule mesostasis is isotropic glass. Metal Fe,Ni abundance is 4.8 vol.%. Olivine has weak undulatory extinction and irregular fractures.

Data from:
  MB112
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Date:20 Nov 2022
Latitude:22°29.71'S
Longitude:68°46.36'W
Mass (g):3.8
Pieces:1
Class:H3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):18.4±4.1 (N=22)
Ferrosilite (mol%):14.1±6.6 (N=17)
Wollastonite (mol%):1.2±1.3 (N=17)
Classifier:Lorenz C. A., Vernad
Type spec mass (g):0.75
Type spec location:Vernad.
Main mass:Mr. M. Nepomiluev, [email protected]
Finder:Mr. M. Nepomiluev
Comments:PMD Fa=22.4%; Field name is M9-31; analyst T. Kryachko (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. 112, in preparation (2023)
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Geography:

Chile
Coordinates:
     Recommended::   (22° 29' 43"S, 68° 46' 22"W)

Statistics:
     This is 1 of 3440 approved meteorites from Antofagasta, Chile (plus 12 unapproved names) (plus 1 impact crater)
     This is 1 of 3469 approved meteorites from Chile (plus 13 unapproved names) (plus 1 impact crater)
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