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Nova 057
Basic information Name: Nova 057
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 1984
Country: Mexico
Mass:help 26.5 kg
Classification
  history:
Recommended:  Iron, IIAB    [explanation]

This is 1 of 135 approved meteorites classified as Iron, IIAB.   [show all]
Search for other: IIAB irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 22 Apr 2019
Writeuphelp
Writeup from MB 108:

Nova 057

Baja, Mexico

Find: 1984

Classification: Iron meteorite (IIAB)

History: Purportedly found in Baja California, Mexico, in 1984

Physical characteristics: The 26.5 kg meteorite is oblong, with a red-brown exterior, regmaglypts of varying size, and measures approximately 40 cm × 18 cm × 15 cm.

Petrography: (C. Herd, UAb) Optical investigation of a small (~1.5 × 2.0 cm) polished and etched slice reveals a Widmanstaetten pattern consistent with a coarsest octahedrite (6-7 mm). No obvious inclusions were noted. Terrestrial alteration appears to have only affected the exterior surface.

Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd and G. Chen UAb): Ni = 5.9, Co = 0.47 (both wt%); Ir = 9.6, Ga = 48, As = 6.4, W = 2.4, Re = 0.8, Os = 1.0, Pt = 17.9, Cu = 101, Au = 0.9 (all µg/g).

Classification: IIAB iron, through comparison of bulk composition with data from Wasson et al. (2007), coarsest octahedrite. Composition is distinct from other known IIAB irons from Mexico, and this is the first known IIAB iron from Baja California.

Specimens: Type specimen consisting of 23 g in four slices at UAb. Main mass with the anonymous owner.

Bibliography:
  • Wasson J.T., Huber H., and Malvin D.J. (2007) Formation of IIAB iron meteorites. Geochim. Cosmochim. Acta 71, 760-781 (link)
Data from:
  MB108
  Table 0
  Line 0:
State/Prov/County:Baja
Date:1984
Mass (g):26500
Pieces:1
Class:iron, IIAB
Shock stage:low
Weathering grade:low
Classifier:C. Herd, UAb
Type spec mass (g):23
Type spec location:UAb
Main mass:Anonymous
Comments:Submitted by C. Herd
Institutions
   and collections
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
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Geography:

Mexico
Coordinates:Unknown.

Statistics:
     This is 1 of 2 approved meteorites from Baja California, Mexico
     This is 1 of 111 approved meteorites from Mexico (plus 4 unapproved names) (plus 1 impact crater)

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