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| Lewis Cliff 87223 | |||||||||||||||||||||||||
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| Basic information | Name: Lewis Cliff 87223 This is an OFFICIAL meteorite name. Abbreviation: LEW 87223 Observed fall: No Year found: 1987 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  110.3 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 6 approved meteorites classified as E3-an. [show all] Search for other: Enstatite chondrites, Enstatite chondrites (type 3), and Enstatite-rich meteorites | ||||||||||||||||||||||||
| Comments: | Field number: 4708 | ||||||||||||||||||||||||
| Writeup |
Writeup from AMN 12(1):
Sample No.: LEW87223 Location: Lewis Cliff Weight(g): 110.3 Field No.: 4708 Dimensions (cm): 7x4x2 Meteorite Type: E3 Chondrite
Macroscopic Description: Carol Schwarz This specimen is so heavily weathered and fractured it fell apart during sampling. It is uniformly weathered to dark reddish-brown.
Thin Section (,2) Description: Brian Mason The section shows a closely-packed aggregate of chondrules, up to 1.5 mm across, together with abundant metal grains and a little sulfide. Weathering is extensive, with brown limonitic staining throughout the section. The chondrules consist almost entirely of polysynthetically twinned clino-enstatite; a few rounded grains of olivine were noted. Most of the pyroxene is close to MgSiO3 in composition, but a few more Fe-rich grains were analysed; one olivine grain has a composition Fa4. The metal has a variable Si content, up to 0.6%. The meteorite is tentatively classified as an E3 chondrite. | ||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 3790: |
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| References: | Published in Antarctic Meteorite Newsletter 12(1) (1989), 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 43856 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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