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Thiel Mountains 82408 | |||||||||||||||||||||||||
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Basic information | Name: Thiel Mountains 82408 This is an OFFICIAL meteorite name. Abbreviation: TIL 82408 Observed fall: No Year found: 1982 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 80.1 g | ||||||||||||||||||||||||
Classification history: |
This is the only approved meteorite classified as LL3.1-3.5. Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||
Writeup |
Writeup from AMN 7(2):
Sample No.: TIL82408 Location: Thiel Mountains Field No.: 2752 Weight (gms): 80.0 Meteorite Type: LL3 Chondrite
Physical Description: Roberta Score Polygonally fractured, black fusion crust coats much of the exterior of this stone. Areas void of fusion crust are somewhat friable. This meteorite is clast-rich with very dark gray to black colored matrix. Oxidation is evenly disseminated throughout the interior surfaces. Dimensions: 4.5 x 4 x 2.5 cm
Petrographic Description: Brian Mason The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 4 mm across. The matrix is black and opaque, much of it forming rims to the chondrules; the matrix contains much sulfide and a little nickel-iron (largely weathered to limonite). A wide variety of chondrule types is present, including porphyritic and granular olivine and olivine-pyroxene, barred olivine, and fine-grained pyroxene. Many of the chondrules contain intergranular glass, sometimes clear and transparent, sometimes turbid and partly devitrified. Microprobe analyses show olivine and pyroxene, with variable compositions: olivine Fa1-Fa29, mean Fa15 (% mean deviation of FeO is 41); pyroxene, Fs2-Fs21, mean Fs9. The highly variable composition of olivine and pyroxene, and the texture, indicate type 3, and the small amount of nickel-iron suggests LL group, hence the meteorite is tentatively classified as an LL3 chondrite. | ||||||||||||||||||||||||
Data from: MB76 Table 2 Line 5472: |
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Catalogs: |
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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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Geography: |
Statistics: This is 1 of 44400 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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Revision history: |
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