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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
.(