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D'Orbigny
Basic information Name: D'Orbigny
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 1979
Country: Argentina
Mass:help 16.55 kg
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  Angrite
Meteoritical Bulletin:  MB 85  (2001)  Angrite
MetBase:  v. 7.1  (2006)  Angrite
Recommended:  Angrite    [explanation]

This is 1 of 22 approved meteorites classified as Angrite.   [show all]
Search for other: Achondrites, Angrites
Writeuphelp
Writeup from MB 85:

D'Orbigny

Buenos Aires, Argentina

Found 1979 July

Angrite

A 16.55 kg stone, mostly covered with dark gray fusion crust, was found in a corn field after a farmer hit it with a plow.  Classification and mineralogy (F. Brandstätter and G. Kurat, NHMV): has a sub­ophitic texture, exhibiting laths of plagioclase (An>99, up to 2 mm) with subhedral to euhedral augite and anhedral to subhedral olivine; augite shows marked optical zoning, with cores containing 1.6 wt% TiO2, 7.8 wt% Al2O3, XMg [Mg/(Mg + Fe + Ca)] = 26.8 mol%, XFe = 21.9 mol%, and XCa = 51.2 mol%, and reddish-brown rims with 4.0 wt% TiO2, 8.0 wt% Al2O3, XMg = 0.6 mol%, XFe = 46.7 mol%, and XCa = 52.6 mol%; olivine is zoned, with cores having Fa39.7La1.3 (La = larnite), 0.9 wt% CaO, 0.13 wt% Cr2O3, 0.45 wt% MnO, and rims having Fa75.9La11.5, 6.6 wt% CaO, 0.12 wt% Cr2O3, 0.93 wt% MnO; in places, anhedral kirschsteinite (Fa62.0La34.0, 20.0 wt% CaO, 0.11 wt% Cr2O3, 0.75 wt% MnO) is intergrown with olivine; in places, abundant ultrabasic glass fills pore spaces (SiO2 ≈40 wt%); minor to accessory phases include transparent brownish spinel (up to 500 µm), ulvöspinel, troilite, and a silicophosphate; contains abundant round vugs, up to 2.3 cm in diameter, and druses containing augite and rare centimeter-sized green olivine crystals (Fa9–11); rock is fresh, but pores contain variable amounts of caliche. Specimens: main mass with finder; type specimen, 184 g, NHMV.

Institutions
   and collections
NHMV: Naturhistorisches Museum, Burgring 7, 1010 Wien, Austria, Austria (institutional address; updated 28 Dec 2011)
Catalogs:
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Search for this meteorite in the Natural History Museum collection (U.K.):   
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References: Published in Meteoritical Bulletin, no. 85, MAPS 36, A293-A322 (2001)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Bruno Fectay and Carine Bidaut   
Heavenly Bodies   
Peter Marmet   
Photograph by Geoffrey Notkin © Oscar E. Monnig Meteorite Gallery   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Achim Faforke   
Allmeteorite.com   
Dave Johnson   
David Hardy   
David L. Ribeca   
Dominik Stoeckli   
Gerald Armstrong   
Gregor H.   
J John Lutzon         
Jay Piatek      
Matteo Chinellato   
MeteoriteCollector.org - FCOM - Russ Finney   
MeteoriteCollector.org - MTCU - Monnig Collection   
METEORITES AUSTRALIA   
Michael S. Scherman   
Peter Marmet   
Woreczko Jan & Wadi   
Geography:

Argentina
Coordinates:
     Catalogue of Meteorites:   (37° 40'S, 61° 39'W)
     Recommended::   (37° 40'S, 61° 39'W)

Statistics:
     This is 1 of 11 approved meteorites from Buenos Aires, Argentina (plus 3 unapproved names)
     This is 1 of 75 approved meteorites from Argentina (plus 9 unapproved names) (plus 2 impact craters)
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