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Thiel Mountains 82412
Basic information Name: Thiel Mountains 82412
     This is an OFFICIAL meteorite name.
Abbreviation: TIL 82412
Observed fall: No
Year found: 1982
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 35.2 g
Antarctic Meteorite Newsletter:  AMN 7(2)  (1984)  H5
Meteoritical Bulletin:  MB 76  (1994)  H5
NHM Catalogue:  5th Edition  (2000)  H5
MetBase:  v. 7.1  (2006)  H5
Recommended:  H5    [explanation]

This is 1 of 10191 approved meteorites (plus 18 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Writeup from AMN 7(2):

Sample No.: TIL82412 & TIL82413

Location: Thiel Mountains

Field No.: 2772 & 2728

Weight (gms): 35.1 & 18.3

Meteorite Type: H5 Chondrite


Physical Description: Roberta Score

Both of these specimens are extensively weathered. Dimensions: 3.5 x 3 x 2 cm & 3 x 2 x 1.5 cm


Petrographic Description: Brian Mason

Chondrules are fairly abundant, but their margins are poorly defined, tending to merge with the granular groundmass, which consists largely of olivine and pyroxene, with minor amounts of nickel-iron and troilite. Brown limonitic staining pervades the section, and veinlets of red-brown limonite are present. Microprobe analyses give the following compositions: olivine, Fa17; pyroxene, Fs16. The meteorite is an H5 chondrite. The sections of these meteorites are similar in all respects and the mineral compositions are the same. The possibility of pairing should be considered.

Data from:
  Table 2
  Line 5476:
Origin or pseudonym:Moulton Escarpment
Mass (g):35.2
Weathering grade:C
Fayalite (mol%):17
Ferrosilite (mol%):16
Comments:82412 pairing group
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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' 9"S, 94° 35' 32"W)
Note: the NHM and MetBase coordinates are 35.3 km apart

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