Meteoritical Bulletin: Entry for Thiel Mountains 91725

MetSoc Home Publications Contacts

Search the Meteoritical Bulletin Database
Last update: 5 Oct 2024
Search for:	Search type:	Search limits:	Display:	Publication:
Names Text Places Classes Years	Contains Starts with Exact Sounds like	NonAntarctic Falls Non-NWAs Has strewnfield		What's new in the last:
Include past classifications in search		Has photo	Limit to approved meteorite names
Search text:

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: 91.1 g

Classification
history:

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

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:
  MB76
  Table 2
  Line 5504:

Origin or pseudonym:	Moulton Escarpment
Mass (g):	91.1
Class:	IAB
Weathering grade:	B/C
Fayalite (mol%):	5
Ferrosilite (mol%):	7

Catalogs:

Search for specimens in the Smithsonian Institution collection (U.S.):	Require SI photo
Search for this meteorite in the NASA/JSC database (U.S.):

References:

Published in Antarctic Meteorite Newsletter 15(2) (1992), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)

Find references in NASA ADS:
Find references in Google Scholar:

Geography:

Antarctica

Coordinates:
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

Statistics:
This is 1 of 45260 approved meteorites from Antarctica (plus 3472 unapproved names)

Proximity search:

Direct link to this page