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Bates Nunataks 00300
Basic information Name: Bates Nunataks 00300
     This is an OFFICIAL meteorite name.
Abbreviation: BTN 00300
Observed fall: No
Year found: 2000
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 124.6 g
NHM Catalogue:  5th Edition  (2000)  Eucrite-unbr
Antarctic Meteorite Newsletter:  AMN 24(2)  (2001)  Eucrite-unbr
Meteoritical Bulletin:  MB 86  (2002)  Eucrite-unbr
MetBase:  v. 7.1  (2006)  Eucrite
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 130 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Writeup from AMN 24(2):
Sample No.: BTN 00300
Location: Bates Nunataks
Field No.: 12056
Dimensions (cm):   5.0x3.5x4.0
Weight (g): 124.563
Meteorite Type: Eucrite

Macroscopic Description: Kathleen McBride
The exterior is 100% fully covered with fusion crust. It has no chips or cracks and looks as though it fell to earth yesterday. The fusion crust is black, glassy and has a ropy texture. The interior has a sandy texture, tan in color giving the appearance similar to sandstone. Binocular microscope shows dense, fine-grained clear yellow (citrine colored) and root beer colored crystals. There are some black mineral grains as well. This meteorite was much more dense and difficult to break than most other similar looking stones.

Thin Section (,2) Description: Tim McCoy and Linda Welzenbach

BTN 00300 - Cross-Polarized Light BTN 00300 - Cross-Polarized Light
Cross-Polarized Light Cross-Polarized Light
The meteorite exhibits an unbrecciated, fine-grained (~200 micron average grain size) structure of pyroxene and feldspar. Pyroxenes are finely-exsolved with lamellae from 1-5 microns and a range of compositions from Fs28Wo35 to Fs49Wo7, as well as a range of intermediate composition. Plagioclase is An87Or0.5. The Fe/Mn ratio of the pyroxene is ~29. The meteorite is a eucrite.

Data from:
  Table A1
  Line 1:
Origin or pseudonym:Bates North
Mass (g):124.6
Class:Eu "ub”
Weathering grade:A
Ferrosilite (mol%):28-49
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References: Published in Antarctic Meteorite Newsletter 24(2) (2001), JSC, Houston
Published in Meteoritical Bulletin, no. 86, MAPS 37, A157-A184 (2002)
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Photographs from AMN:
Photograph from unknown source A photo is in the write-up above

     Catalogue of Meteorites:   (80° 15'S, 153° 30'E)
     Recommended::   (80° 15'S, 153° 30'E)

     This is 1 of 44048 approved meteorites from Antarctica (plus 3802 unapproved names)
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