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| Lewis Cliff 86021 | |||||||||||||||||||||||||
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| Basic information | Name: Lewis Cliff 86021 This is an OFFICIAL meteorite name. Abbreviation: LEW 86021 Observed fall: No Year found: 1986 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  326 g | ||||||||||||||||||||||||
| Classification history: |
This is the only approved meteorite classified as L3.5-3.9. Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||
| Comments: | Field number: 2332 | ||||||||||||||||||||||||
| Writeup |
Writeup from AMN 11(1):
Sample No.: LEW86021 Location: Lewis Cliff Weight (g): 325.8 Field No.: 2332 Dimensions (cm): 6x6.5x4.5 Meteorite Type: L3 Chondrite
Macroscopic Description: Roberta Score LEW86021 is a rounded specimen that is mostly covered with iridescent fusion crust. Evaporite deposit is present on some exterior surfaces. The interior of LEW86021 is heavily weathered. Large areas of orange oxidation are present in the otherwise red-brown interior. Some evaporite deposit developed on the interior surfaces after the stone dried in a nitrogen cabinet for several hours.
Thin Section (,5) Description: Brian Mason The section shows a close-packed mass of chondrules (up to 2.7 mm across), chondrule fragments, and irregular crystalline aggregates, together with minor amounts of interstitial nickel-iron and troilite. A variety of chondrule types is present, including granular and porphyritic olivine and olivine-pyroxene, barred olivine, and radiating pyroxene. Weathering is extensive, with limonitic staining and areas of brown limonite throughout the section. Microprobe analyses give the following compositions: olivine, Fa18-28, mean Fa21 (CV FeO is 10); pyroxene, Fs4-17. The meteorite is an L3 chondrite (estimated L3.9). | ||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 3064: |
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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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