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Thiel Mountains 91725
Basic information Name: Thiel Mountains 91725
     This is an OFFICIAL meteorite name.
Abbreviation: TIL 91725
Observed fall: No
Year found: 1991
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 91.1 g
Antarctic Meteorite Newsletter:  AMN 15(2)  (1992)  Iron w/silicate inclusions
AMN 17(1)  (1994)  IAB
Meteoritical Bulletin:  MB 76  (1994)  IAB
NHM Catalogue:  5th Edition  (2000)  IAB
MetBase:  v. 7.1  (2006)  IAB-ung
Recommended:  Iron, IAB-ung    [explanation]

This is 1 of 68 approved meteorites classified as Iron, IAB-ung.   [show all]
Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites
Writeup from AMN 15(2):

Sample No.: TIL91725

Location: Thiel Mountains

Field Number: 7589

Dimensions (cm): 4.0 x 2.5 x 2.0

Weight (g): 91.1

Meteorite Type: Iron with silicate inclusions


Macroscopic Description: Cecilia Satterwhite

The exterior of this irregular-shaped meteorite is dark brown to black and shiny. The interior has an orangish-brown color with abundant silicates in metal. Surfaces are rough and jagged. The white deposit present is probably a weathering feature.


Thin Section (,5) Description: Brian Mason

The section consists of silicate clasts, up to 9 mm in maximum dimension, and individual silicate grains, in a nickel-iron matrix. The clasts are made up mainly of anhedral pyroxene and olivine grains, with some plagioclase. Microprobe analyses show the following compositions: olivine, Fa5; orthopyroxene, Wo2Fs7; diopside, Wo45Fs3; plagioclase, An12. The meteorite is an iron with silicate inclusions.


Data from:
  Table 2
  Line 5504:
Origin or pseudonym:Moulton Escarpment
Mass (g):91.1
Weathering grade:B/C
Fayalite (mol%):5
Ferrosilite (mol%):7
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References: Published in Antarctic Meteorite Newsletter 15(2) (1992), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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     Catalogue of Meteorites:   (85° 15'S, 91° 0'W)
     Recommended::   (85° 9' 45"S, 94° 50' 13"W)
Note: the NHM and MetBase coordinates are 37.1 km apart

     This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names)
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