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Los Vientos 051
Basic information Name: Los Vientos 051
     This is an OFFICIAL meteorite name.
Abbreviation: LoV 051
Observed fall: No
Year found: 2010
Country: Chile
Mass:help 66 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  C3-ung
Recommended:  CL3.9    [explanation]

This is 1 of 2 approved meteorites classified as CL3.9.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), and CL chondrites
Comments: Approved 12 Feb 2014
Revised 29 Aug 2021: Reclassification
Writeuphelp
Writeup from MB 103:

Los Vientos 051 (LoV 051)        ~24°41’S, ~69°46’W

Antofagasta, Chile

Found: 2010 Sep 30

Classification: Carbonaceous chondrite (C3, ungrouped)

History: A single stone was found in the Atacama desert in September 2010 by E. Christensen and A. Serio.

Physical characteristics: A flat rusted stone with caliche on the bottom side. Cut face shows chondrules, some armored with metal and sulfides, set in a brownish matrix.

Petrography: (J. Gattacceca. CEREGE) Chondrules, mainly of type I, up to 2.5 mm (average diameter 940±280 μm) make up ~50% of the meteorite. Metal blebs up to 1 mm in diameter are found in and around the chondrules and in the matrix.

Geochemistry: Olivine Fa13.1±1.4, PMD=8%, n=31, FeO/MnO=57.6, Cr2O3=0.10± 0.17 wt.%; orthopyroxene Fs9.2±3.3Wo 1.1±0.6, Fs PMD=32%, n=9, FeO/MnO=38.7. Some chondrules contain plagioclase An92.9Ab7.1Or0.1. Oxygen isotopic composition (J. Gattacceca, C. Sonzogni, CEREGE) is δ17O = -4.90 ‰, δ18O = -1.24 ‰, Δ17O = -4.25‰ (analysis of one acid-washed 1.5 mg bulk sample). Magnetic susceptibility log χ =5.24.

Classification: Carbonaceous chondrite. Texture and chondrule size resemble CR chondrites, however mineral composition and oxygen isotopes indicate C3-ung. Minor weathering.

Specimens: 15 g and a polished section at CEREGE. Main mass with Eric Christensen.


Writeup from MB 110:

Los Vientos 051 (LoV 051)

Antofagasta, Chile

Find: 2010

Revised classification and description.

Petrography: Carbonaceous chondrite with high chondrule abundance (78 vol%) and low amount of fine-grained matrix (17 vol%). Composed of irregularly formed Type-I chondrules, few Type-II chondrules, refractory inclusions (CAIs, AOAs), inter-chondrule metal and sulfide grains and matrix. Contains high amounts of (partly terrestrially oxidized) metal (magnetic susceptibility log χ (× 10-9 m3/kg) = 5.24). Mean chondrule size: 476±324 μm (75-2490 μm; n=397). Fragments of chondrules and refractory inclusions occur, but macroscopically this sample is unbrecciated. It is of shock stage C-S2 and has a weathering grade of W1/2.

Geochemistry: Olivine is nearly equilibrated with a mean value of Fa12.8±1.2. The mean composition of low-Ca pyroxene is Fs10.2±3.3Wo1.1±0.3. Bulk oxygen isotopic composition: δ17O = -7.626±0.486; δ18O = -4.151±0.518; Δ17O = -5.467±0.216 per mil. Bulk Ti and Cr isotopic composition: ε50Ti ± 2σ = 2.85±0.08; ε54Cr ± 2σ = 0.76±0.12.

Classification: Due to its characteristically low amount of matrix, highly depleted concentrations of volatile elements, high magnetic susceptibility, low Fa values of nearly equilibrated olivine, and unique position in the ε50Ti-ε54Cr diagram, this sample was reclassified as a CL3.9 chondrite by Metzler et al. (2021).

Bibliography:
  • Metzler K., Hezel D.C., Barosch J., Wölfer E., Schneider J.M., Hellmann J.L., Berndt J., Stracke A., Gattacceca J., Greenwood R.C., Franchi I.A., Burkhardt C., and Kleine T. (2021) The Loongana (CL) group of carbonaceous chondrites. Geochim. Cosmochim. Acta 304, 1–31. (link)
Data from:
  MB103
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Origin or pseudonym:deflation surface
Date:2010 Sep 30
Latitude:~24°41'S
Longitude:~69°46'W
Mass (g):66
Pieces:1
Class:C3-ung
Weathering grade:minor
Fayalite (mol%):13.7±1.4
Ferrosilite (mol%):9.2±3.3
Wollastonite (mol%):1.1±0.6
Magnetic suscept.:5.24
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):15
Type spec location:CEREGE
Main mass:Eric Christensen
Finder:E. Christensen and A. Serio
Comments:Submitted by J. Gattacceca
Plots: O isotopes:  
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Geography:

Chile
Coordinates:
     Recommended::   (24° 41'S, 69° 46'W)

Statistics:
     This is 1 of 2125 approved meteorites from Antofagasta, Chile (plus 5 unapproved names) (plus 1 impact crater)
     This is 1 of 2153 approved meteorites from Chile (plus 12 unapproved names) (plus 1 impact crater)
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