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| Lewis Cliff 87064 | |||||||||||||||||||||
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| Basic information | Name: Lewis Cliff 87064 This is an OFFICIAL meteorite name. Abbreviation: LEW 87064 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 20 approved meteorites classified as H3.5. [show all] Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||
| Comments: | Field number: 4148 | ||||||||||||||||||||
| Writeup |
Writeup from AMN 15(1):
Sample No.: LEW87064 Location: Lewis Cliff Field Number: 4148 Dimensions (cm): 2 x 1.5 x 1.5 Weight (g): 6.7 Meteorite Type: H3 chondrite
Macroscopic Description: Carol Schwarz LEW87064 is a rounded stone with a smooth surface. Ninety five percent of the exterior is covered with fusion crust. Although the interior is extensively weathered, several millimeter-sized chondrules are visible.
Thin Section (,2) Description: Brian Mason The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 1.8 mm across, in a granular matrix containing a moderate amount of nickel-iron and troilite. A variety of chondrule types is present, including granular and porphyritic olivine and olivine-pyroxene, and radiating and cryptocrystalline pyroxene. Weathering is extensive, with limonitic staining and areas of red-brown limonite throughout the section. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa2-20, mean Fa14 (CV FeO is 43); pyroxene, Fs3-21. The amount of nickel-iron suggests H group, and the variability of olivine and pyroxene compositions type 3, hence the meteorite is classified as an H3 chondrite (estimated H3.5).
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| Data from: MB76 Table 2 Line 3641: |
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| References: | Published in Antarctic Meteorite Newsletter 15(1) (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 40719 approved meteorites from Antarctica (plus 4494 unapproved names) | ||||||||||||||||||||
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