Norms - Step by Step Example

Normative Minerals

(ap):	(CaO)_3.3(P₂O₅)
(il):	(FeO)(TiO₂)
(or):	(K₂O)(Al₂O₃)(SiO₂)₆
(ab):	(Na₂O)(Al₂O₃)(SiO₂)₆
(ac):	(Na₂O)(Fe₂O₃)(SiO₂)₄
(an):	(CaO)((Al₂O₃)(SiO₂)₂
( C):	(Al₂O₃)
(mt):	(FeO)(Fe₂O₃
(hm):	(Fe₂O₃)
(di):	(CaO)([Mg,Fe]O)(SiO₂)₂
(hy):	([Mg,Fe]O)(SiO₂)
( Q):	(SiO₂)
(ol):	([Mg,Fe]O)₂(SiO₂)
(ne):	(Na₂O)(SiO₂)₂
(le):	(K₂O)(Al₂O₃)(SiO₂)₄
(kp):	(K₂O)(Al₂O₃)(SiO₂)₂
(ks):	(K₂O)(SiO₂)
(ns):	(Na₂O)(SiO₂)
(wo):	(CaO)(SiO₂)
(cs):	(CaO)₂(SiO₂
(tn):	(CaO)(TiO₂)(SiO₂)
(pf):	(CaO)(TiO₂)
(rt):	(TiO₂)

10.11 Step by Step Example: Average Crust - Screen 0

This is an esitmated chemical analysis of average continental crust (Rudnick and Gao, 2005). The data are in units of weight percentages of the oxides, which is equivalent to grams of oxide per hundred grams of rock.