Mineralogy and chemical compositions of chondrule rims in ... · 03COE317-maeda.ppt Author:...
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Mineralogy and chemical compositions of chondrule rims in the CM carbonaceous chondrites
Transcript of Mineralogy and chemical compositions of chondrule rims in ... · 03COE317-maeda.ppt Author:...
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Mineralogy and chemical
compositions of chondrule
rims in the CM carbonaceous
chondrites
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CM
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CM
ol
:
( )
( )
0.3mm100μm
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( )
(Mg, Fe)2Si2O6 , Mg2Si2O6 (Mg,Fe)3Si2O5(OH)4
( )
FeS (Fe, Ni)9S8 6(Fe0.9S) (Mg,Fe2+)(OH)2
10μm50μm
Nogoya
PCP
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• :Metzler et al. (1992)
( )
( )
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: SEM-EDS
: Y791198 ( ), Cold Bokkeveld ( ), Nogoya ( )
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:
: 5μm-150μm,
Y791198 ( ) Nogoya ( )
50μm 0.1mm
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mode ( + )
vol%
40 1727
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25μm
major minerals:
( ), ( ),
minor minerals:
, ( ),
Y791198 ( )
( )
0.1mm
PCP
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major minerals:
( )
minor minerals:
( ),
Nogoya ( )
( )
20μm0.1mm
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( )Cold Bokkeveld ( )
(Enstatite)
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( PCP)
Nogoya( )
serp
entin
e
Fe
MgSi+Al
serp
entin
e
Y791198( )
serp
entin
e
Si+Al
Fe
Mg Cold Bokkeveld( )
serp
entin
e
Mg
Fe
Si+Al
PCP
serpentine PCP (Mg-rich) (Mg )
( )
Mg ( )
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1. :
2. :
3. : Fe-rich Mg-rich
( Mg )
( )