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Miller Range 090220
Basic information Name: Miller Range 090220
     This is an OFFICIAL meteorite name.
Abbreviation: MIL 090220
Observed fall: No
Year found: 2009
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 28 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 34(2)  (2011)  Diogenite
Meteoritical Bulletin:  MB 100  (2012)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 446 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Field number: 20834
Approved 10 Sep 2011
Writeuphelp
Writeup from AMN 34(2):
Sample Number MIL 090220
Newsletter 34,2
Location Miller Range
Field Number 20834
Dimensions 3.0 x 3.0 x 2.0
Weight 28.04
Original Classification Diogenite
Pairing MIL 090159, MIL 090220, MIL 090221
Macroscopic Description - Kathleen McBride
These achondrites are covered with brown/black fusion crust (50-85%), shiny in areas and have some areas with polygonal fractures. The interior matrices are tan with small mm sized white, tan and black inclusions. 0221 has dendritic looking dark veins that surround some clasts.
Thin Section (,2) Description - Cari Corrigan, Linda Welzenbach, Andrew Beck and Nicole Lunning
These meteorites are similar enough that one description is sufficient. Thin sections of each show a groundmass of coarse (up to 1.5 mm) comminuted pyroxene, with minor plagioclase and SiO2. Orthopyroxene has a composition of Fs32-36Wo2-4, augites are Fs12-15Wo40-43 and plagioclase is An84-89Or0-1. The Fe/Mn ratio of the pyroxene is 26-30. These meteorites are diogenites.
Antarctic Meteorite Images for Sample MIL 090220
Lab Photo of Sample MIL 090220 Showing Splits View  Lab Photo of Sample MIL 090220 Showing North View 
Data from:
  MB100
  Table 1
  Line 599:
Date:2009
Mass (g):28
Pieces:1
Class:Diogenite
Weathering grade:A/B
Ferrosilite (mol%):32-34
Classifier:SI
Type spec mass (g):28
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 34(2) (2011), JSC, Houston
Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Geography:

Antarctica
Coordinates:
     Recommended::   (83° 24' 16"S, 156° 45' 22"E)

Statistics:
     This is 1 of 40719 approved meteorites from Antarctica (plus 4494 unapproved names)
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