Question:
MERJENJE STOPNJE PREPERELOSTI
Author: Nina_malinaAnswer:
• RAZMERJE SI/Al je mera za stopnjo preperelosti • Kemični indeks spremenjenosti (CIA – chemical index of alteration) CIA = [Al2O3/ (Al2O3 + CaO + Na2O + K2O] x 100 • Kemični indeks preperevanja (CIW – chemical index of weathering) CIW = [Al2O3/ (Al2O3 + CaO + Na2O] x 100 • Indeks kompozitne spremenljivosti (ICV – index of compositional variability) ICV = [(Fe2O3 + K2O + Na2O + CaO + MnO + TiO2) / Al2O3]
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Nina_malina