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Thiel Mountains 82406
Basic information Name: Thiel Mountains 82406
     This is an OFFICIAL meteorite name.
Abbreviation: TIL 82406
Observed fall: No
Year found: 1982
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 152 g
Antarctic Meteorite Newsletter:  AMN 7(2)  (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 1709 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)
Writeup from AMN 7(2):

Sample No.: TIL82406

Location: Thiel Mountains

Field No.: 2764

Weight (gms): 152.0

Meteorite Type: L4 chondrite

Physical Description: Roberta Score

The overall shape of TIL82406 is angular with subrounded edges. Dull black fusion crust covers most of the store. The dark gray interior contains numerous inclusions and oxidation is evenly scattered throughout. Dimensions: 5.5 x 5.0 x 3.5 cm

Petrographic Description: Brian Mason

The section shows a close-packed aggregate of chondrules, up to 2 mm across, in a small amount of matrix consisting of fine-grained olivine and pyroxene and coarser grains of nickel-iron and troilite. The commonest types of chondrules are porphyritic olivine and olivine-pyroxene, and fine-grained pyroxene; much of the pyroxene is polysynthetically twinned clinobronzite. Brown limonitic staining pervades the section. Microprobe analyses give the following compositions: olivine, Fa23, pyroxene somewhat variable, mean Fs19. The meteorite is an L4 chondrite.

Data from:
  Table 2
  Line 5470:
Origin or pseudonym:Moulton Escarpment
Mass (g):152
Weathering grade:B
Fayalite (mol%):23
Ferrosilite (mol%):19
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References: Published in Antarctic Meteorite Newsletter 7(2) (1984), 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' 56"S, 94° 37' 25"W)
Note: the NHM and MetBase coordinates are 35.1 km apart

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