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| Lewis Cliff 87220 | |||||||||||||||||||||||||
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| Basic information | Name: Lewis Cliff 87220 This is an OFFICIAL meteorite name. Abbreviation: LEW 87220 Observed fall: No Year found: 1987 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  6.7 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: 4733 | ||||||||||||||||||||||||
| Writeup |
Writeup from AMN 15(2):
Sample No.: LEW87220; 87234 Location: Lewis Cliff Field Number: 4733; 4786 Dimensions (cm): 2.5x2x4.4; 5x2.5x2 Weight (g): 6.7; 34.2 Meteorite Type: E3 Chondrite
Macroscopic Description: Carol Schwarz There is no fusion crust remaining on either of these extremely weathered specimens. Both are extensively fractured and friable with no features visible on the interior. 87234 has some evaporates.
Thin Section (LEW87220,2; 87234,2) Description: Brian Mason These two meteorites are identical and cans be confidently paired with LEW87057, 87223, 87237, and 87285. The sections show a closely packed aggregate of chondrules, up to 1.2 mm across, together with abundant metal grains and minor sulfide. The meteorites are severely weathered, with limonite staining and areas of brown limonite throughout the sections. The chondrules consist of radiating or granular pyroxene. Most of the pyroxene is close to MgSiO3 in composition, but a few more Fe-rich grains were analyzed. One grain of forsteritic olivine was analyzed in LEW87234. The metal contains 0.4-0.6% Si. The meteorites are classified as E3 chondrites.
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| Data from: MB76 Table 2 Line 3787: |
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| References: | Published in Antarctic Meteorite Newsletter 15(2) (1992), 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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