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Graves Nunataks 12510
Basic information Name: Graves Nunataks 12510
     This is an OFFICIAL meteorite name.
Abbreviation: GRA 12510
Observed fall: No
Year found: 2012
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 4.4 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 38(2)  (2015)  Winonaite
Meteoritical Bulletin:  MB 104  (2015)  Winonaite
Recommended:  Winonaite    [explanation]

This is 1 of 37 approved meteorites classified as Winonaite.   [show all]
Search for other: Primitive achondrites, Winonaites
Comments: Approved 28 Aug 2015
Writeuphelp
Writeup from AMN 38(2):
Sample Number GRA 12510
Newsletter 38,2
Location Graves Nunataks
Field Number 24348
Dimensions 2.0 x 1.7 x 0.7
Weight 4.41
Original Classification Winonaite
Mineral Composition (%Fa &  %Fs)
Fayalite (mol%): 1-3; Ferrosilite (mol%): 1-4
Macroscopic Description - Cecilia Satterwhite
80% of the exterior is covered with black/brown fusion crust that is rusty in some areas. The interior is rusty orange with metal and has a coarse grained texture.
Thin Section Description (,2) - Cari Corrigan, Tim McCoy
The section is composed of subequal amounts of iron-nickel metal with troilite and silicate grains, up to 0.5 mm. Metal grains include rare graphite and schreibersite. The silicates include olivine (Fa1-3), orthopyroxene (Fs1-4Wo1-2), clinopyroxene (Fs1-5Wo45-49) and feldspar. The combination of graphite-bearing metal and low-FeO mafics suggests this meteorite is a winonaite and closely related to the silicate-bearing IAB irons.
Antarctic Meteorite Images for Sample GRA 12510
Thin Section Photo of Sample GRA 12510 in Plane-Polarized Light with 2.5X Magnification  Thin Section Photo of Sample GRA 12510 in Reflected Light with 2.5X Magnification  Thin Section Photo of Sample GRA 12510 in Cross-Polarized Light with 2.5X Magnification  Thin Section Photo of Sample GRA 12510 in Plane-Polarized Light with 5X Magnification 
Thin Section Photo of Sample GRA 12510 in Reflected Light with 5X Magnification  Thin Section Photo of Sample GRA 12510 in Cross-Polarized Light with 5X Magnification 
Data from:
  MB104
  Table 0
  Line 0:
Date:2012
Mass (g):4.4
Pieces:1
Class:Winonaite
Weathering grade:B
Fayalite (mol%):1-3
Ferrosilite (mol%):1-4
Classifier:SI
Type spec mass (g):4.4
Type spec location:JSC
Main mass:JSC
Finder:ANSMET
Comments:Submitted by AMN
Institutions
   and collections
JSC: Mailcode KT, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 3 Sep 2013)
SI: Department of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Website (institutional address; updated 16 Jan 2012)
Catalogs:
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 38(2) (2015), JSC, Houston
Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)

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