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Miller Range 090597
Basic information Name: Miller Range 090597
     This is an OFFICIAL meteorite name.
Abbreviation: MIL 090597
Observed fall: No
Year found: 2009
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 1.4 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 35(2)  (2012)  CO3
Meteoritical Bulletin:  MB 101  (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: 20026
Approved 4 Sep 2012
Writeuphelp
Writeup from AMN 35(2):
Sample Number MIL 090597
Newsletter 35,2
Location Miller Range
Field Number 20026
Dimensions 1.75 x 1.0 x 0.75
Weight 1.4
Original Classification CO3 Chondrite
Pairing MIL 090010, MIL 090025, MIL 090038, MIL 090117, MIL 090118, MIL 090122, MIL 090128, MIL 090132, MIL 090133, MIL 090134, MIL 090138, MIL 090139, MIL 090230, MIL 090231, MIL 090233, MIL 090235, MIL 090236, MIL 090293, MIL 090451, MIL 090453, MIL 090454, MIL 090457, MIL 090459, MIL 090461, MIL 090462, MIL 090463, MIL 090464, MIL 090465, MIL 090466, MIL 090467, MIL 090468, MIL 090469, MIL 090470, MIL 090473, MIL 090474, MIL 090478, MIL 090535, MIL 090539, MIL 090554, MIL 090558, MIL 090588, MIL 090591, MIL 090593, MIL 090594, MIL 090596, MIL 090597, MIL 090598, MIL 090641, MIL 090683, MIL 090686, MIL 090692, MIL 090696, MIL 090699, MIL 11101, MIL 11109, MIL 11203
Mineral Composition (%Fa &  %Fs)
Fayalite (mol%): 19-39; Ferrosilite (mol%): 1-5
Weathering
A/B
Fracturing
B
Macroscopic Description - Roger Harrington, Kathleen McBride and Cecilia Satterwhite
These carbonaceous chondrites have black/brown fusion crust; some have evaporites. Areas without fusion crust range from dark gray to black with some rusty brown matrix. The interiors are fine grained black matrix with minor oxidation and contain some tiny white inclusions.
Thin Section Description (,2) - Cari Corrigan and Nicole Lunning
These meteorites are so similar that a single description suffices. The sections consist of abundant small (up to 1.3 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 are dark inclusions (specifically in MIL 090470). Olivine ranges in composition from Fa0-76. Pyroxene analyses range from Fs1-15 Wo0-5 with one Fs35. 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 07531 pairing group.
Antarctic Meteorite Images for Sample MIL 090597
Lab Group Photo of Sample MIL 090597 Showing North View  Thin Section Photo of Sample MIL 090597 in Plane-Polarized Light with 1.25X Magnification  Thin Section Photo of Sample MIL 090597 in Reflected Light with 1.25X Magnification  Thin Section Photo of Sample MIL 090597 in Cross-Polarized Light with 1.25X Magnification 
Thin Section Photo of Sample MIL 090597 in Plane-Polarized Light with 2.5X Magnification  Thin Section Photo of Sample MIL 090597 in Reflected Light with 2.5X Magnification  Thin Section Photo of Sample MIL 090597 in Cross-Polarized Light with 2.5X Magnification 
Data from:
  MB101
  Table 0
  Line 0:
Date:2009
Mass (g):1.4
Pieces:1
Class:CO3
Weathering grade:A/B
Fayalite (mol%):19-39
Ferrosilite (mol%):1-5
Classifier:SI
Type spec mass (g):1.4
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 35(2) (2012), JSC, Houston
Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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Geography:

Antarctica
Coordinates:
     Recommended::   (83° 23' 22"S, 155° 52' 16"E)

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