Mineralogy - Origin of Potassium-rich Silica-deficient Igneous Rocks - page 43

Table 2.8 Analyses of nephelines from K-rich mac and ultramac lavas
SiO 2

FeO a

TiO 2 Al 2 O 3 Fe 2 O 3 MgO CaO SrO BaO Na 2 O 2 O H 2 O Total

1 46.00 0.05 30.10 2.90 0.66 0.06

16.20 4.70 100.67

2 42.80 0.06 32.70 1.70 0.10 0.06

15.70 6.90 100.02

3 42.30 34.00 0.72 2.90

15.10 4.20 99.22

4 45.95 31.31 0.47 0.95 0.03 0.36

17.55 3.88 100.5

5 47.40 31.40 0.82 0.73

16.40 3.20 99.95

6 40.20 0.05 32.51 1.80 0.10 1.44 0.20

10.86 12.22 99.38

7 38.47 30.81 1.63 0.63 0.20

2.09 25.65 99.48

8 38.42 0.05 31.01 1.12 0.03 0.67

0.30 28.33 99.93

9 48.33 31.1 1.06 0.46 0.46

16.04 100.82

10 48.43 30.97 1.08 0.44 0.44

16.03 100.86

11 43.12 33.49 1.23 3.41 3.41 0.24

14.17 100.16

12 42.76 30.01 2.08 8.83 8.83 0.29

12.01 99.33

13 42.77 33.50 1.14 3.72 3.72 0.29

13.56 99.56

14 45.83 32.64 0.49 0.27

17.05 3.73 100.01

(continued)