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Miller Range 11231
Basic information Name: Miller Range 11231
     This is an OFFICIAL meteorite name.
Abbreviation: MIL 11231
Observed fall: No
Year found: 2011
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 3.7 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 37(2)  (2014)  CR2
Meteoritical Bulletin:  MB 103  (2014)  CR2
Recommended:  CR2    [explanation]

This is 1 of 188 approved meteorites classified as CR2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites
Comments: Field number: 23239
Approved 8 Sep 2014
Writeuphelp
Writeup from AMN 37(2):
Sample Number MIL 11231
Newsletter 37,2
Location Miller Range
Field Number 23239
Dimensions 1.5 x 1.5 x 0.8
Weight 3.71
Original Classification CR2 Chondrite
Mineral Composition (%Fa &  %Fs)
Fayalite (mol%): 0-2.4; ferrosilite (mol%): 2
Weathering
B
Fracturing
A/B
Macroscopic Description - Cecilia Satterwhite
Black/brown fusion crust covers 95% of the exterior which is fractured and frothy in areas. The interior is a black matrix with visible chondrules and inclusions, some lighter than the matrix. Some rusty areas are visible.
Thin Section Description (,2) - Cari Corrigan, Linda Welzenbach, Devin Schrader and Pamela Salyer
The section exhibits a variety of chondrule sizes (from 200 microns up to 3 mm), well-defined metal-rich chondrules, and CAIs in a dark matrix of FeO-rich phyllosilicate. Pyroxenes are polysynthetically twinned. Olivine compositions are Fa0-2, and pyroxenes are Fs2Wo1. The meteorite is probably a CR2 chondrite.
Antarctic Meteorite Images for Sample MIL 11231
Thin Section Photo of Sample MIL 11231 in Plane-Polarized Light with 1.25x Magnification  Thin Section Photo of Sample MIL 11231 in Reflected Light with 1.25x Magnification  Thin Section Photo of Sample MIL 11231 in Cross-Polarized Light with 1.25x Magnification  Thin Section Photo of Sample MIL 11231 in Plane-Polarized Light with 2.5x Magnification 
Thin Section Photo of Sample MIL 11231 in Reflected Light with 2.5x Magnification  Thin Section Photo of Sample MIL 11231 in Cross-Polarized Light with 2.5x Magnification  Lab Group Photo of Sample MIL 11231 Displaying North Orientation 
Data from:
  MB103
  Table 0
  Line 0:
Date:2011
Mass (g):3.7
Pieces:1
Class:CR2
Weathering grade:B
Fayalite (mol%):0-2.4
Ferrosilite (mol%):2
Classifier:SI
Type spec mass (g):3.7
Type spec location:JSC
Main mass:JSC
Finder:ANSMET
Comments:Submitted by AMN
Institutions
   and collections		 JSC: Mailcode XI, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 28 Jul 2022)
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 37(2) (2014), JSC, Houston
Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography:

Antarctica
Coordinates:
     Recommended::   (83° 28' 59"S, 157° 11' 6"E)

Statistics:
     This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names)
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