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Antarctica 004 | |||||||||||||||||||||||||||||
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Basic information | Name: Antarctica 004 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 1992 or 1993 Country: Antarctica [Collected by a pilot supporting ANSMET] Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 11485 approved meteorites (plus 6 unapproved names) classified as L6. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||
Comments: | Approved 23 Dec 2019 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 108:
Antarctica 004 Antarctica Find: 1992-1993 Classification: Ordinary chondrite (L6) History: A single specimen weighing 70 g was collected by a Canadian pilot supporting ANSMET searching during the 1992-93 season, from an unspecified location within Antarctica. Physical characteristics: The single, rounded mass is covered in fusion crust and has minor iron staining. Interior surfaces show evidence for brecciation. Petrography: (C. Herd, UAb) Optical and microprobe examination of a polished thin section shows a brecciated texture, including areas darkened by comminution, with poorly defined chondrules in a recrystallized matrix. Shock effects include strong mosaicism, PDFs and PFs in olivine. Minor iron staining is present throughout. Weathering grade according to Zurfluh et al. (2016); shock stage according to Fritz et al. (2017). Geochemistry: (C. Herd, UAb) Data obtained by EMP examination of carbon-coated thin section: Olivine Fa24.5±0.7 (n=35); Low-Ca Pyroxene Fs20.9±0.4Wo1.5±0.2 (n=25). Classification: Ordinary chondrite, L6 Specimens: Entire specimen, including one thin section is at UAb. Difference between recovered weight and type specimen is due to cutting losses. | ||||||||||||||||||||||||||||
Bibliography: |
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Data from: MB108 Table 0 Line 0: |
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Institutions and collections |
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography:![]() |
Statistics: This is 1 of 40719 approved meteorites from Antarctica (plus 4494 unapproved names) |