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| Lewis Cliff 86270 | |||||||||||||||||||||
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| Basic information | Name: Lewis Cliff 86270 This is an OFFICIAL meteorite name. Abbreviation: LEW 86270 Observed fall: No Year found: 1986 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  4.2 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 17 approved meteorites classified as L3.1. [show all] Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||
| Comments: | Field number: 2343 | ||||||||||||||||||||
| Writeup |
Writeup from AMN 11(1):
Sample No.: LEW86270 Location: Lewis Cliff Weight (g): 4.2 Field No.: 2343 Dimensions (cm): 2x1.5x1 Meteorite Type: L3 Chondrite
Macroscopic Description: Roberta Score This specimen is highly fractured and has weathered red-brown. Interior is dark with abundant rounded inclusions and is heavily oxidized in some areas.
Thin Section (,2) Description: Brian Mason The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 4 mm across, in a small amount of dark matrix heavily infiltrated with brown limonite. Accessory amounts of nickel-iron and troilite are present, concentrated on the margins of chondrules. Most of the chondrules are of granular or porphyritic olivine and olivine-pyroxene. One barred chondrule consists of olivine (Fa19), pyroxene (Wo12Fs20, with 2.0% Al2O3 and 0.4% TiO2), and plagioclase (An92). Microprobe analyses of the bulk show olivine and pyroxene of variable composition: olivine, Fa0.6-28, mean Fa14 (CV FeO is 52); pyroxene, Fs0.4-19. The low content of nickel-iron suggests L group, and the wide range of olivine and pyroxene compositions type 3, hence the meteorite is tentatively classified as an L3 chondrite (estimated L3.4). | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 3306: |
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| References: | Published in Antarctic Meteorite Newsletter 11(1) (1988), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:
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Statistics: This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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| Revision history: |
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