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Northwest Africa 7795
Basic information Name: Northwest Africa 7795
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7795
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 218 g
Meteoritical Bulletin:  MB 105  (2016)  Iron, IAB-ung
Recommended:  Iron, IAB-ung    [explanation]

This is 1 of 68 approved meteorites classified as Iron, IAB-ung.   [show all]
Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 31 Mar 2016
Writeup from MB 105:

Northwest Africa 7795 (NWA 7795)

Northwest Africa

Purchased: 2012

Classification: Iron meteorite (IAB, ungrouped)

History: Jason Utas purchased the iron from Gary Fujihara on ebay in late January 2012.

Petrography: As described for NWA 8154, NWA 8155, and NWA 8539, the metal consists of grains 0.20 × 0.15 mm with no evidence of an octahedral pattern. The structures is anomalous. The absence of a pattern suggest fast cooling. The small graphite ellipsoids (sometimes arranged like the petals of a flower) may reflect the locations of the last, C-rich melt to crystallize.

Geochemistry: Composition: Co, 4.72 mg/g; Ni, 136.0 mg/g; Ga, 50.2 μg/g; Ge,~320 μg/g.; As, 16.0 μg/g; Ir 22.0 μg/g; Au, 1.545 μg/g. The meteorite is compositionally a member of the IAB complex.

Classification: The meteorite is classified IAB-ungr. On most element-Au diagrams it plots close to IAB-sLM but there are large deviations in some elements (a factor of 2 for W) and IAB-ungr is the best choice.

Specimens: This meteorite is closely similar to NWA 8154, NWA 8155 and NWA 8539 and appears to be paired with them.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2012
Mass (g):217.6
Class:Iron, IAB-ung
Weathering grade:low
Classifier:J. T. Wasson, UCLA
Type spec mass (g):30.6
Type spec location:UCLA
Main mass:J. Utas
Comments:Submitted by Wasson, J. Utas
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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