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Cariquima
Basic information Name: Cariquima
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2021
Country: Chile
Mass:help 280 g
Classification
  history:
Recommended:  howardite    [explanation]

This is 1 of 417 approved meteorites classified as howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 15 Dec 2021
Writeuphelp
Writeup from MB 110:

Cariquima        19°28’S, 68°39’W

Tarapaca, Chile

Find: 2021 Jul 26

Classification: HED achondrite (Howardite)

History: The meteorite was found by Alexandre Corgne and Gaëlle Plissart while trekking

Physical characteristics: A single specimen with glassy fusion crust on all sides and some flow lines. Mass is 280 g. Density is 2.8. Fairly porous and weakly consolidated.

Petrography: (A. Corgne, Universidad Austral de Chile) Polymict breccia of submm/ mm sized basalt and OPX clasts in a fine matrix of related crystalline debris with typical grain size less than 50 µm. Contains aprox. 70 wt% eucrite materials and 30 wt% diogenite materials (based on average Al and Ca contents of the fusion crust). Eucrite components are mostly lithic fragments of basaltic eucrite, with only some clasts of cumulate eucrite. These clasts vary in texture from fine-grained porphyritic to coarsegrained subophitic. One cumulate eucrite clast presents a variolitic texture. The eucrite materials typically contain exsolved ferroan pigeonite and plagioclase, as well as minor and accessory phases such as silica, ilmenite, chromite, troilite, metal, zircon, fayalitic olivine, apatite and merrillite. Diogenite components are essentially orthopyroxene fragments, some with thin chromite veins. Shock evidence include the presence of melt pockets and veins with quenched texture in some pyroxene and silica grains and darkening of pyroxene by small blebs of metal and troilite. One round chondrule-like chromite-plagioclase assemblage was also observed in the studied polished thick section.

Geochemistry: Pyroxene overall Fe/Mn (atomic) 29.8±3.1 (N=77). Diogenitic low-Ca pyroxene Fs21.7±2.9Wo2.1±0.7 (N=18), Ca-pyroxene Fs16.6Wo38.8 (N=1). Eucritic low-Ca pyroxene Fs47.5±9.0Wo5.7±3.2 (N=36), Ca-pyroxene exsolution lamellae Fs33.7±12.4Wo34.4±7.6 (N=12). Plagioclase An87.8±4.8Ab12.2±4.8 (N=42). Chromite Cr# = 0.77±0.06 (N=8).

Classification: HED achondrite (howardite). No evident weathering.

Specimens: Type specimen at CEREGE (20 g). A polished section at CRPG. A polished thick section and main mass with Corgne (Universidad Austral de Chile).

Data from:
  MB110
  Table 0
  Line 0:
State/Prov/County:Tarapaca
Date:2021 Jul 26
Latitude:19°28'S
Longitude:68°39'W
Mass (g):280
Pieces:1
Class:howardite
Classifier:A. Corgne
Type spec mass (g):20
Type spec location:CEREGE
Main mass:A. Corgne
Finder:A. Corgne, G. Plissart
Comments:Submitted by A. Corgne
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)
CRPG: Centre de Recherches Pétrographiques et Géochimiques, CNRS EP 2031, 15 rue Notre-Dame des Pauvres, BP 20, 54501 Vandoeuvre-lès-Nancy Cedex, France (institutional address; updated 27 Feb 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Photos:
CreditPhotos
Public domain photographs:
A Corgne   
Geography:

Chile
Coordinates:
     Recommended::   (19° 28'S, 68° 39'W)

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