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Al OFe OMgOCaO

OO

MnOTiOP O

Al O Fe O

EPMA

Fe O

Fe O Fe O

Al

Point MgO CaO MnO Al O Cr O Fe O TiO Total

ƒO

ƒO

273)21(123.0246.0468.0

1000)(CPXCPX

OC

CaLnXT

Ca

CaCPX XCPX

CPX=(Ca/(Ca+Mg+Fe XCPX=(Fe /(Fe CPX

CPX

ƒO XCO

Point MgO CaO MnO FeO Total

Al

.(

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