|
Thiel Mountains 91700 | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Thiel Mountains 91700 This is an OFFICIAL meteorite name. Abbreviation: TIL 91700 Observed fall: No Year found: 1991 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 256 g | ||||||||||||||||||||
Classification history: |
This is 1 of 2060 approved meteorites (plus 5 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 |
Writeup from AMN 16(1):
Sample No.: TIL91700; 91702; 91703; 91704; 91708; 91711; 91721; 91723 Location: Thiel Mountains Dimensions (cm): 6.0 x 5.0 x 3.5; 9 x 7 x 3; 9.5 x 5.5 x 5.3; 7 x 4 x 3; 8 x 6 x 3.5; 8.5 x 5 x 3; 7 x 6x3; 11 x5.5x2 Weight (g): 256.1; 304.7; 264.9; 234.7; 310.4; 276.3; 233.6; 264.6 Meteorite Type: L4 Chondrite
Macroscopic Description: Robbie Marlow and Carol Schwarz Between 25% and 95% of the exteriors of these meteorites are covered with thin black fusion crust. The interiors show dark gray to black matrix with large oxidation haloes and heavy oxidation in places. Numerous inclusions range in size from <1 mm to 2 mm, many larger clasts were noted, one in particular is 0.9 x 0.5 cm in 91704.
Thin Section (91700.2: 91702.2: 91703.2:, 91704.2: 91708.2: 91711.2: 91721.2: 91723.2) Description: Brian Mason The textures, mineral compositions, and degree of weathering shown by these sections are so similar that the meteorites can confidently be paired. The sections show a close-packed aggregate of chondrules, chondrule fragments, and occasional clasts, with minor subequal amounts of nickel-iron and troilite. Minor weathering is indicated by brown limonitic staining throughout the sections. Microprobe analyses show fairly uniform olivine compositions (Fa23-25) and variable pyroxene compositions (Fs15-25). The meteorites are classified as L4 chondrites, although the nickel-iron content appears to be higher than the normal for L-group chondrites. Additional members of this pairing group are: TIL91705, 91718, and 91720. Optical examination shows that TIL91701, 91709, and 91712 are also paired with these meteorites.
| ||||||||||||||||||||
Data from: MB76 Table 2 Line 5480: |
|
||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||
References: | Published in Antarctic Meteorite Newsletter 16(1) (1993), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
| ||||||||||||||||||||
Geography: |
Statistics: This is 1 of 44400 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
Proximity search: | |||||||||||||||||||||
Crosslinks: |
This lists all records that are linked to this record and to each other.
| ||||||||||||||||||||
Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
| ||||||||||||||||||||
Revision history: |
This lists important revisions made to data for this record.
|