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Miller Range 090840
Basic information Name: Miller Range 090840
     This is an OFFICIAL meteorite name.
Abbreviation: MIL 090840
Observed fall: No
Year found: 2009
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 0.7 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 35(1)  (2012)  CO3
Meteoritical Bulletin:  MB 100  (2012)  CO3
Recommended:  CO3    [explanation]

This is 1 of 554 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: 20653
Approved 25 Feb 2012
Writeuphelp
Writeup from AMN 35(1):
Sample Number MIL 090840
Newsletter 35,1
Location Miller Range
Field Number 20653
Dimensions 1.0 x 0.75 x 0.5
Weight 0.74
Original Classification CO3 Chondrite
Pairing MIL 090543; MIL 090705; MIL 090840; MIL 090890; MIL 090891; MIL 090897; MIL 090907; MIL 090915; MIL 090919; MIL 090955; MIL 090967; MIL 090983; MIL 090988; MIL 090989
Mineral Composition (%Fa &  %Fs)
Fayalite (mol%): 2-71; Ferrosilite (mol%): 0-5
Weathering
B
Fracturing
B
Macroscopic Description - Kathleen McBride, and Cecilia Satterwhite
The exteriors of these carbonaceous chondrites have brown/black fusion crust with polygonal fractures. The interiors range from dark gray to black fine grained matrix with minor oxidation and small white inclusions.
Thin Section Description (,MIL 090705,3; MIL 090890,4; MIL 090891,4) - Cari Corrigan and Linda Welzenbach
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 Fa0-71. Pyroxene analyses range from Fs1-10 Wo0.9 with one Wo35. These meteorites vary with respect to terrestrial alteration. These meteorites 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 090840
Thin Section Photo of Sample MIL 090840 in Plane-Polarized Light with 2.5X Magnification  Thin Section Photo of Sample MIL 090840 in Reflected Light with 2.5X Magnification  Thin Section Photo of Sample MIL 090840 in Cross-Polarized Light with 2.5X Magnification  Lab Photo of Sample MIL 090840 Showing North View 
Data from:
  MB100
  Table 1
  Line 1025:
Date:2009
Mass (g):0.7
Pieces:1
Class:CO3
Weathering grade:B
Fayalite (mol%):2-71
Ferrosilite (mol%):0-5
Classifier:SI
Type spec mass (g):0.7
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 35(1) (2012), JSC, Houston
Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Geography:

Antarctica
Coordinates:
     Recommended::   (83° 22' 2"S, 156° 28' 55"E)

Statistics:
     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)
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