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23.1 grams. K
TKW 23.1 grams. Fall not observed. Found 1987 in the Lewis Cliff area of Antarctica.
The only type K meteorite known.
Location Map of Antarctic Falls
AMN writes:
Macroscopic Description - Carol Schwarz
LEW87232 is a rounded stone with small patches of fusion crust remaining on one side. This specimen appears to be more weathered at the very center than on the exterior. The matrix is yellowish. Some metal was noted.
Thin Section Description (,2) - Brian Mason
The section shows numerous chondrules (up to 1.8 mm across), chondrule fragments, and mineral grains in a translucent brown matrix. Chondrules are mainly granular or porphyritic olivine and olivine-pyroxene. Minor amounts of nickel-iron and a little sulfide are present as small grains scattered through the matrix or sometimes concentrated on chondrule rims. Many of the metal grains are rimmed with brown limonite. The matrix appears to consist largely of phyllosilicates. Microprobe analyses show the olivine is close to Mg2SiO4 in composition (Fa0.6-2, mean Fa1.0, CV FeO = 56); pyroxene is enstatite or clinoenstatite, Fs0.5-9. One small xenocryst of plagioclase, An19, was analyzed. The meteorite is tentatively classified as a C2 chondrite of the Renazzo subtype.
Click to view larger photos #1
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Jason Utas
9/27/2013 10:36:19 AM |
So...is it a CR2 or a K? |
Jimi Van Halen
9/25/2013 4:25:28 AM |
must have been a glitch in the met bull, kakangari has appeared www.lpi.usra.edu/meteor/metbull.php?code=12230 |
Jimi Van Halen
9/25/2013 4:22:04 AM |
interestingly the Met Bull doesn't list Kakangari.The Catalogue of Meteorites however lists 3.......Kakangari, fall ,1890 India.....Lea County 002, find 1988 USA and Lewis Cliff find 1987..www.nhm.ac.uk/research-curation/research/projects/metcat/search/list.dsml?Grp=K&sort=Name |
Herbert
9/25/2013 3:24:54 AM |
Interesting specimen, though certainly not the only K chondrite. There is at least the type specimen Kakangari, which fell in India in 1890.
@Grahm: C2 was obviously tentatively assigned before it was recognized that it is a K chondrite. |
Graham
9/25/2013 3:01:45 AM |
Not heard of K....how can it be K and also C2?....is it different enough from C2 to become a new type? |
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