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| Los Vientos 051 | |||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Los Vientos 051 This is an OFFICIAL meteorite name. Abbreviation: LoV 051 Observed fall: No Year found: 2010 Country: Chile Mass:  66 g | ||||||||||||||||||||||||||||||||||||||
| Classification history: |
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 | ||||||||||||||||||||||||||||||||||||||
| Writeup |
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: |
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| Data from: MB103 Table 0 Line 0: |
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| 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) |
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| 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:
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Statistics: This is 1 of 2261 approved meteorites from Antofagasta, Chile (plus 6 unapproved names) (plus 1 impact crater) This is 1 of 2290 approved meteorites from Chile (plus 13 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||||||||
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