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Miller Range 090427
Basic information Name: Miller Range 090427
     This is an OFFICIAL meteorite name.
Abbreviation: MIL 090427
Observed fall: No
Year found: 2009
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 2.2 g
Antarctic Meteorite Newsletter:  AMN 34(2)  (2011)  CO3
Meteoritical Bulletin:  MB 100  (2012)  CO3
Recommended:  CO3    [explanation]

This is 1 of 589 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Field number: 20967
Approved 10 Sep 2011
Writeup from AMN 34(2):
Sample Number MIL 090427
Newsletter 34,2
Location Miller Range
Field Number 20967
Dimensions 1.25 x 1.25 x 1.0
Weight 2.15
Original Classification CO3 Chondrite
Pairing MIL 090019, MIL 090152, MIL 090227, MIL 090264, MIL 090342, MIL 090392, MIL 090427, MIL 090428, MIL 090437, MIL 090439, MIL 090446, MIL 090483, MIL 090486, MIL 090488, MIL 090514, MIL 090708, MIL 090710, MIL 090712, MIL 090714, MIL 090716, MIL 090717, MIL 090722, MIL 090723, MIL 090727, MIL 090730
Macroscopic Description - Kathleen McBride and William Satterwhite
The exteriors of these carbonaceous chondrites all have black/brown fusion crust exhibiting various forms of fracturing. Some of these meteorites have polygonal fractures, while others have penetrating cracks. All have areas of rusty brown oxidation. The interiors consist of uniform fine grained, black matrix with oxidation and light specks of white irregular inclusions/chondrules.
Thin Section (,2) Description - Cari Corrigan, Linda Welzenbach and Nicole Lunning
These meteorites are so similar that a single description suffices. The sections consist of abundant small (up to 1 mm) chondrules, chondrule fragments, and mineral grains in a dark matrix. Metal and sulfide occur within and rimming the chondrules. Glass within chondrules appears to be very clear/fresh. CAIs are abundant in many sections (mostly Type A), and range in size up to 1 mm, many containing blue hibonite grains. At least one compound CAI was found. AOAs up to 1 mm are present, as well. Olivine ranges in composition from Fa0-65. Pyroxene analyses range from Fs1-32 (most from Fs1-7) Wo0.5-4. These meteorites are somewhat terrestrially altered. These are CO3 chondrites (likely type 3.0-3.2) and are probably members of the MIL 07099 pairing group.
Antarctic Meteorite Images for Sample MIL 090427
Lab Group Photo of Sample MIL 090427Showing North View 
Data from:
  Table 1
  Line 710:
Mass (g):2.2
Weathering grade:B
Fayalite (mol%):0-56
Ferrosilite (mol%):1-2
Type spec mass (g):2.2
Type spec location:JSC
Main mass:JSC
Comments:Submitted by AMN
   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)
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 34(2) (2011), JSC, Houston
Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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     Recommended::   (83° 22' 7"S, 156° 33' 0"E)

     This is 1 of 41899 approved meteorites from Antarctica (plus 3802 unapproved names)
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