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Thiel Mountains 82411
Basic information Name: Thiel Mountains 82411
     This is an OFFICIAL meteorite name.
Abbreviation: TIL 82411
Observed fall: No
Year found: 1982
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 179.5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 7(1)  (1984)  L4
Meteoritical Bulletin:  MB 76  (1994)  L4
NHM Catalogue:  5th Edition  (2000)  L4
MetBase:  v. 7.1  (2006)  L4
Recommended:  L4    [explanation]

This is 1 of 1707 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Writeuphelp
Writeup from AMN 7(1):

Sample No.: TIL82411

Location: Thiel Mountains

Field No.: 2762

Weight (gms): 179.5

Meteorite Type: L4 Chondrite

 

Physical Description: Carol Schwarz

Specimen is covered with a slightly weathered fusion crust. No fractures are present. The interior is dark and has abundant chondrules 1 to 2 mm in diameter. Weathering is slight. Dimensions: 6.5 x 4.5 x 3 cm

 

Petrographic Description: Brian Mason

The section consists largely of chondrules, up to 2.4 mm in diameter, with interstitial olivine, pyroxene, nickel-iron, and troilite. Chondrule types include granular and porphyritic olivine and olivine-pyroxene, barred olivine, and fine-grained pyroxene. Much of the pyroxene is polysynthetically twinned clinobronzite. Microprobe analyses give the following compositions: olivine, Fa24; pyroxene, Fs21. The meteorite is classified as an L4 chondrite.

Data from:
  MB76
  Table 2
  Line 5475:
Origin or pseudonym:Moulton Escarpment
Mass (g):179.5
Class:L4
Weathering grade:A/B
Fayalite (mol%):24
Ferrosilite (mol%):21
Comments:26Al=49±3
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 7(1) (1984), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (85° 15'S, 91° 0'W)
     Recommended::   (85° 9' 56"S, 94° 36' 58"W)
Note: the NHM and MetBase coordinates are 35 km apart

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