Meteoritical Bulletin: Entry for Calama 138

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Calama 138

Basic information

Name: Calama 138
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2020
Country: Chile
Mass: 69 g

Classification
history:

Meteoritical Bulletin:	MB 110	(2022)	CO3
Recommended:			CO3 [explanation]

This is 1 of 645 approved meteorites (plus 1 unapproved name) classified as CO3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites

Comments:

Approved 28 Mar 2021

Writeup

Writeup from MB 110:

Calama 138 22°24’26"S, 68°49’39"W

Antofagasta, Chile

Purchased: 2020 Oct

Classification: Carbonaceous chondrite (CO3)

Physical characteristics: A single stone. Cut face reveals a dark brown interior with small chondrules.

Petrography: (J. Gattacceca, CEREGE) Chondrite with small chondrules (average apparent diameter 150±70 µm, n=30) and small CAIs, set in a abundant fine-grained, iron-rich matrix. Opaque minerals are metal and troilite.

Geochemistry: Olivine Fa_14.1±11.5, range Fa_0.5-32.9, Fa PMD=116% (n=9). Cr₂O₃ in ferroan olivine 0.12±0.10 (n=8). Low-Ca pyroxene Fs_6.3±3.9Wo_3.7±0.8(n=4).

Classification: Carbonaceous chondrite (CO3)

Specimens: Type specimen at CEREGE. Main mass with Kuntz.

Data from:
  MB110
  Table 0
  Line 0:

State/Prov/County:	Antofagasta
Date:	P 2020 Oct
Latitude:	22°24'26"S
Longitude:	68°49'39"W
Mass (g):	69.0
Pieces:	1
Class:	CO3
Weathering grade:	moderate
Fayalite (mol%):	14.1±11.5 (n=9)
Ferrosilite (mol%):	6.3±3.9 (n=4)
Wollastonite (mol%):	3.7±0.8
Magnetic suscept.:	4.45
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	14.98
Type spec location:	CEREGE
Main mass:	Kuntz
Finder:	Jimmy Pizarro
Comments:	work name K527; submitted by Jérôme Gattacceca

Institutions
and collections

CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 10 Jun 2023)
Kuntz: Fabien Kuntz, France; Website (private address)

Catalogs:

References:

Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Ryan Upchurch

Geography:

Chile

Coordinates:
Recommended::	(22° 24' 26"S, 68° 49' 39"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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Revision
history:

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