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Miller Range 090687
Basic information Name: Miller Range 090687
     This is an OFFICIAL meteorite name.
Abbreviation: MIL 090687
Observed fall: No
Year found: 2009
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 0.8 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 35(2)  (2012)  Eucrite
Meteoritical Bulletin:  MB 101  (2012)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 429 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Field number: 20293
Approved 4 Sep 2012
Writeuphelp
Writeup from AMN 35(2):
Sample Number MIL 090687
Newsletter 35,2
Location Miller Range
Field Number 20293
Dimensions 1.0 x 1.0 x 0.5
Weight 0.77
Original Classification Eucrite
Mineral Composition (%Fa &  %Fs)
Fayalite (mol%): 87-89; Ferrosilite (mol%): 37-45
Weathering
B
Fracturing
B
Macroscopic Description - Kathleen McBride
The exterior is brown/black with some oxidation haloes.
Thin Section Description - Cari Corrigan, Andrew Beck and Nicole Lunning
This meteorite is dominated by coarse-grained (~500 micron average grain size) lathes of feldspar, some of which are fractured and recrystallized. Olivine grains, not common in eucrites, are found in this meteorite. Both olivine and pyroxene grains are much smaller (~50 microns). Mineral compositions are homogeneous with pyroxenes of Fs38-45Wo37-42), olivine (Fa87-89), and plagioclase (An90Or0.2). The Fe/Mn ratio of the pyroxene is ~30. The meteorite is a eucrite.
Antarctic Meteorite Images for Sample MIL 090687
Lab Group Photo of Sample MIL 090687 Showing North View  Thin Section Photo of Sample MIL 090687 in Plane-Polarized Light with 1.25X Magnification  Thin Section Photo of Sample MIL 090687 in Reflected Light with 1.25X Magnification  Thin Section Photo of Sample MIL 090687 in Cross-Polarized Light with 1.25X Magnification 
Thin Section Photo of Sample MIL 090687 in Plane-Polarized Light with 2.5X Magnification  Thin Section Photo of Sample MIL 090687 in Reflected Light with 2.5X Magnification  Thin Section Photo of Sample MIL 090687 in Cross-Polarized Light with 2.5X Magnification 
Data from:
  MB101
  Table 0
  Line 0:
Date:2009
Mass (g):0.8
Pieces:1
Class:Eucrite
Weathering grade:B
Fayalite (mol%):87-89
Ferrosilite (mol%):37-45
Classifier:SI
Type spec mass (g):0.8
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' 10"S, 155° 58' 44"E)

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