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San Juan 009
Basic information Name: San Juan 009
     This is an OFFICIAL meteorite name.
Abbreviation: SJ 009
Observed fall: No
Year found: 2007
Country: Chile
Mass:help 45.6 g
Meteoritical Bulletin:  MB 95  (2009)  CO3
Recommended:  CO3    [explanation]

This is 1 of 473 approved meteorites classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 12 Feb 2009
Revised 20 Jan 2013: True coordinates supplied by J. Gattacceca
Writeup from MB 95:

San Juan 009             ~25°30′S 69°50′W

Area San Juan, Comuna Taltal, Provincia Tocopilla, región Antofagasta, Chile

Find: 23 July 2007

Type: CO3

History: A single stone was found in a deflation surface of the San Juan area, in the Atacama Desert, northern Chile, by the 2007 CEREGE-Universidad de Chile scientific expedition (Millarca Valenzuela, Jerome Gattacceca and Clement Suavet). This is the first carbonaceous chondrite found in the Chilean territory.

Physical characteristics: (J. Gattacceca, CEREGE) A single stone of 45.56 g without fusion crust and a smooth dark brown outer surface. The interior has the same dark brown color. Grain density is 3.25 g/cc. Log χ = 4.69 indicate maximum metallic Fe-Ni content of 8.9 wt%.

Petrography (M. Valenzuela U. Chile, M. Bourot-Denise MNHNP, J. Gattacceca, C. Suavet CEREGE): Sharply defined type I chondrules are dominant (~50% vol) and range in size from few tens of microns to 1 mm, with average ~200 μm. Type II chondrules are scarce (~2% vol), CAIs and AOIs account for ~5 vol% of the meteorite, dark matrix is ~30% vol, and the rest correspond to olivine, pyroxene fragments (~8% vol) and opaques phases (5% vol) as nodules of Fe-Ni and troilite and possible magnetite.

Mineral compositions and geochemistry: Olivine ranges from Fa0,27 to Fa57,4 (mean value Fa17.3, n = 29). Low-Ca pyroxene is Fs0.76–3.39 (mean value Fs1.68, n = 19). Terrestial age obtained by 14C measurements (UAz Accel. MS laboratory, T. Jull, M. Leclerc, M. Valenzuela) is less than 1.3 ka. The average of two oxygen isotope analyses of acid-washed 1.5 mg bulk samples (C. Suavet, C. Sonzogni, A. Alexandre, J. Gattacceca, CEREGE) is δ17O = −7.98‰, δ18O = −4.78‰, and Δ17O = −5.49‰.

Type specimens: 38 g and one polished-thin section are on deposit at U.Chile, 4 g and one polished section at CEREGE, and one polished section at MNHNP.

Classification: Carbonaceous chondrite (CO3). The meteorite is basically unshocked (S1) and has minor weathering.

Data from:
  Table 4
  Line 8:
State/Prov/County:Area San Juan,Comuna Taltal, Provincia T
Origin or pseudonym:Deflation surface
Mass (g):45.56
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):11.5±12.08
Ferrosilite (mol%):14.8±3.82
Magnetic suscept.:4.69
Classifier:M. V. Millarca Valenzuela, Chil, Pierre Rochette, CEREGE, Jerome Gattacceca, CEREGE, Clement Suavet, CEREGE, Michèle Denise (MNHNP)
Type spec mass (g):40.56
Type spec location:CEREGE
Main mass:Chil
Comments:PMD-Fa=87.51; PMD-Fs=42.99
Plots: O isotopes:  
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Europole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 9 Mar 2016)
MNHNP: Museum National d'Histoire Naturelle, 61 Rue Buffon, LMCM-CP52, 75005 Paris, France, France; Website (institutional address; updated 8 Nov 2012)
UAz: Lunar and Planetary Laboratory, University of Arizona, 1629 E. University Blvd., Tucson, AZ 85721, United States (institutional address; updated 14 Jan 2012)
Chil: University of Chile, Plaza Ercilla 803, Casilla 13518­, Correo 21, Santiago, Chile (institutional address; updated 17 Sep 2011)
References: Published in Meteoritical Bulletin, no. 95, MAPS 44, 429-462 (2009)
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     Recommended::   (25° 26' 52"S, 69° 52' 19"W)

     This is 1 of 909 approved meteorites from Antofagasta, Chile (plus 1 impact crater)
     This is 1 of 934 approved meteorites from Chile (plus 9 unapproved names) (plus 1 impact crater)
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