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Taylor Glacier 05181
Basic information Name: Taylor Glacier 05181
     This is an OFFICIAL meteorite name.
Abbreviation: TYR 05181
Observed fall: No
Year found: 2005
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 544 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 30(2)  (2007)  IIE
Meteoritical Bulletin:  MB 94  (2008)  IIE
Recommended:  Iron, IIE    [explanation]

This is 1 of 14 approved meteorites classified as Iron, IIE.   [show all]
Search for other: IIE irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 31 Aug 2007
Writeuphelp
Writeup from AMN 30(2):
Sample No.: TYR 05181
Location: Taylor Glacier
Field No.: 17359
Dimensions (cm):   8.0 x 4.5 x 4.5
Weight (g): 544.1
Meteorite Type:

Iron-IIE



Macroscopic Description: Tim McCoy
The meteorite is a somewhat irregularly shaped mass of ~8 x 4.5 x 4.5 cm. One surface is relatively smooth, with small (1-2 mm) pits and large (1-2 cm), shallow depressions that may be regmaglypts. The opposite surface is highly-irregular in shape, with planar surfaces, larger (~5 mm) deep pits, and linear depressions that can reach a few cm in length and a few mm in width and depth.

Thin Section (,2) Description: Tim McCoy
A longitudinal slice measuring ~3 x 3.5 cm was examined prior to thin section preparation. The slice exhibits a prominent reheated α2 structure around the entire margin, reaching to a depth of up to 5 mm. The section includes inclusions of rounded to elongate troilite (up to 2 x 10 mm), sometimes occurring with silicates, as well as silicate-dominated inclusions, the largest of which reaches 7 mm in diameter and is truncated by the surface. Inclusions are rimmed by swathing kamacite, set inside a Widmanstätten pattern indicative of formation from a single austenite crystal and with kamacite bandwidths of ~1 mm. Examination of the polished thin section reveals that the polyminerallic inclusions consist of orthopyroxene (Fs19Wo1), augite (Fs8-11Wo32-42), potassium feldspar (An0-3Or25-58), phosphate (probably whitlockite), chromite and troilite. The inclusion mineralogy does not exactly match other known meteorites, but is similar to IIE irons such as Miles. No fusion crust is present and a weathered zone ~100 µm thick overlies a reheated zone reaching to 0.5 mm depth. The meteorite is dominated by short, wide (~0.8 mm) kamacite lamellae with rectangular and triangular plessite fields. A microprobe traverse yields an average composition of 8.3 wt.% Ni, 0.04 wt.% P and 0.54 wt.% Co. The Ni concentration is similar to other IIE irons (e.g., Kodaikanal). The meteorite is an iron, probably from group IIE.



Thin Section Images

Reflected Light
TYR 05181
TYR05181 - Reflected LightTYR05181 - Reflected Light



Lab Images

TYR 05181

Data from:
  MB94
  Table 4
  Line 386:
Mass (g):544.1
Class:IIE
Weathering grade:A
Ferrosilite (mol%):19
Catalogs:
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 30(2) (2007), JSC, Houston
Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photographs from AMN:
JSC A photo is in the write-up above
Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 38937 approved meteorites from Antarctica (plus 5051 unapproved names)

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