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| Lewis Cliff 86307 | |||||||||||||||||||||||||
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| Basic information | Name: Lewis Cliff 86307 This is an OFFICIAL meteorite name. Abbreviation: LEW 86307 Observed fall: No Year found: 1986 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  4.9 g | ||||||||||||||||||||||||
| Classification history: |
This is the only approved meteorite classified as L3.3-3.5. Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||
| Comments: | Field number: 3349 | ||||||||||||||||||||||||
| Writeup |
Writeup from AMN 11(2):
Sample No.: LEW86307; 86367 Location: Lewis Cliff Weight (g): 4.9; 10.5 Field No.: 3349; 3327 Dimensions (cm): 3x1x1; 2.5x2x1.5 Meteorite Type: L3 Chondrite
Macroscopic Description: Roberta Score, René Martinez LEW86307 is oblong-shaped and covered with about 80% fusion crust; 86367 has >90% fusion crust. Both specimens are moderately weathered, but inclusions and chondrules are abundant and obvious. No metal is visible.
Thin Section (86307,2;86367.3) Description: Brian Mason LEW86307,2 shows a close-packed aggregate of chondrules and chondrule fragments, up to 1.8 mm across, in a minimum amount of fine-grained dark matrix which contains a small amount of nickel-iron and troilite. Chondrule types include granular and porphyritic olivine and olivine-pyroxene, and radiating and cryptocrystalline pyroxene. Weathering is extensive, with brown limonitic staining throughout. Microprobe analyses show olivine and pyroxene with a wide range of composition: olivine, Fa3-29 (CV FeO is 42) ; pyroxene, Fs2-14. The low content of nickel-iron suggests L group, and the wide range of olivine and pyroxene compositions, type 3; thus this meteorite is classified as an L3 chondrite (estimated L3.5). LEW86367 is very similar to 86307 in all respects and they are probably paired. Both are also similar to LEW86127 and several other LEW86xxx L3 chondrites (Antarctic Meteorite Newsletter v. 11, #1, p. 18). | ||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 3342: |
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| References: | Published in Antarctic Meteorite Newsletter 11(2) (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 44547 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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| Revision history: |
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