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:

Recommended:

CO3 [explanation]

This is 1 of 612 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 29 Oct 2018)
Kuntz: Fabien Kuntz, France; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 110, in preparation (2021)

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Geography:

Chile

Coordinates:
Recommended::	(22° 24' 26"S, 68° 49' 39"W)

Statistics:
This is 1 of 2255 approved meteorites from Antofagasta, Chile (plus 6 unapproved names) (plus 1 impact crater)
This is 1 of 2284 approved meteorites from Chile (plus 13 unapproved names) (plus 1 impact crater)

Proximity search:

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