Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 73. (Budapest 1981)

Embey-Isztin, A. ; Noske-Fazekas, G.: On the chemistry of the large phenocrysts in the tuff of Godóvár (Börzsöny Mts., Hungary)

Table 1. continuation 15. 15. 17. 18. 19. 20. 21. Si0

2 52.9 49.8 51.1 50.0 52.6 53.0 52.3 A1

2

0

3 2.77 5.8 4.2 4.3 2.44 1.67 2.16 Ti0

2 0.44 0.77 0.71 0.78 0.42 0.34 0.43 Cr

2

0

3 0.00 0.01 0.00 0.03 0.00 0.03 0.05 Fe

2

0

3 — — — — — — — FeO 9.3 9.6 8.3 8.6 9.3 8.6 7.8 MnO 0.37 0.16 0.15 0.20 0.41 0.40 0.24 MgO 14.2 12.8 14.3 14.3 14.5 15.8 15.7 CaO 21.1 21.5 21.4 20.8 21.2 19.9 20.8 Na

2

0 0.35 0.37 0.26 0.25 0.26 0.20 0.22 K

2

0 0.05 0.04 0.03 0.04 0.02 0.03 0.03 NiO rj t~*\ 0.03 0.00 0.04 0.00 0.00 0.00 0.05 rl

2

U— H

2

0 + — > — — — — — Total: 101.51 100.85 100.49 99.30 101.15 99.97 99.78 Si 1.940 1.848 1.889 1.874 1.938 1.961 1.939 A1

IV 0.060 0.152 0.111 0.126 0.062 0.039 0.061 A1

VI 0.060 0.102 0.072 0.064 0.044 0.034 0.033 Ti 0.012 0.021 0.018 0.022 0.012 0.010 0.012 Cr 0.000 0.000 0.000 0.001 0.000 0.001 0.001 Fe

3

+ — — — — — — Fe

2+ 0.285 0.298 0.256 0.270 0.286 0.266 0.242 Mg 0.776 0.708 0.788 0.799 0.796 0.871 0.867 Ca 0.829 0.855 0.848 0.835 0.837 0.789 0.826 Na 0.025 0.026 0.019 0.018 0.018 0.014 0.016 K 0.002 0.002 0.001 0.002 0.001 0.001 0.001 Ni 0.001 0.000 0.001 0.000 0.000 0.000 0.001 Atom % Mg 41.0 38.0 41.6 42.0 41.5 45.2 44.8 Fe 15.1 16.0 19.5 14.2 14.9 13.8 12.5 Ca 43.9 46.0 44.8 43.8 43.6 41.0 42.7 mg 72.4 70.0 75.1 74.3 73.5 76.6 78.2