sobresaturada

Cálculo de la Norma CIPW

Pesos moleculares:

SiO2 = 60.08;

TiO2 = 79.9;

Al2O3 = 101.96;

Fe2O3 = 159.69;

FeO = 71.85;

MgO = 40.3;

MnO = 70.94;

CaO = 56.08;

Na2O = 61.98;

K2O = 94.2;

P2O5 = 141.94;           

Minerales sálicos:

Cuarzo (SiO2) = 60.08;

Corindón (Al2O3) = 101.96;

Ortosa (K2O.Al2O3.6SiO2) = 556.64;

Albita (Na2O.Al2O3.6SiO2) = 524.42;

Anortita (CaO.Al2O3.2SiO2) = 278.2;

Nefelina (Na2O.Al2O3.2SiO2) = 284.1;

Leucita (K2O.Al2O3.4SiO2) = 436.48;

Kalsilita (K2O.Al2O3. 2SiO2) = 316.32;

Metasilicato Sódico (Na2O.SiO2) = 122.06;

 

Minerales fémicos:

Acmita (Na2O. Fe2O3. 4 SiO2) = 461.99;

Enstatita (MgO.SiO2) = 100.38;

Ferrosilita (FeO.SiO2) = 131.93;

Wollanstonita (CaO.SiO2) = 116.16;

Forsterita (2MgO.SiO2) = 140.68;

Fayalita (2FeO.SiO2) = 203.78;

Larnita (2CaO.SiO2) = 172.24;

Diópsido (CaO MgO 2 SiO2)

 

Accesorios:

Ilmenita (FeO.TiO2) = 151.75;

Titanita (TiO2.CaO.SiO2) = 196.06;

Rutilo (TiO2) = 79.9;

Perowskita (TiO2.CaO) = 135.98;

Magnetita (FeO.Fe2O3) = 231.54;

Hematites (Fe2O3) = 159.69;

Apatito (3CaO.P2O5) = 336.1;

 

 

Procedimiento:

 

1.- Cálculo de los milimoles: Dividir cada óxido por su peso molecular, multiplicar por 1000 y redondear. Sumar los milimoles de MnO al FeO.

 

Basalto                    

                          

Oxides                                                                                                           Milimoles                                                                                                                                          

SiO2     71.30                           (71.3/60.08)*1000 = 1187                                 SiO2     1187

TiO2    0.31                             (0.31/79.9)*1000 = 4                                        TiO2          4

Al2O3  14.32                           (14.32/101.96)*1000 = 140                               Al2O3     140

Fe2O3  1.21                             (1.21/159.69)*1000 = 8                                     Fe2O3       8

FeO     1.64                             (1.64/71.85)*1000 = 24                                     FeO         24

MgO    0.71                             (0.71/40.3)*1000 = 18                                      MgO        18

MnO    0.05                             (0.05/70.94)*1000 = 1                                      MnO          1

CaO     1.84                             (1.84/56.08)*1000 = 33                                     CaO        33

Na2O   3.68                             (3.68/61.98)*1000 = 59                                     Na2O      59

K2O     4.07                             (4.07/94.2)*1000 = 43                                      K2O        43

P2O5   0.12                             (0.12/141.94)*1000 = 1                                     P2O5         1

Tot                  99.25

                       

Todos los pasos siguientes se harán a partir de los milimoles.

 

Siguentes pasos: Calculo de la mineralogía saturada