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 3. Chemical analyses of plagioclases 1. 2. 3. Si0 2 54.5 54.8 45.0 A1 2 0 3 27.8 27.9 32.6 Ti0 2 0.04 0.03 0.05 Cr 2 0 3 0.04 0.04 0.07 FeO 0.62 0.75 0.68 MnO 0.00 0.00 0.00 MgO 0.04 0.06 0.04 CaO 12.1 12.3 17.6 Na 2 0 4.1 3.9 1.01 K 2 0 0.21 0.24 0.06 NiO 0.05 0.00 0.00 Total : 99.50 100.02 97.11 Si 9.912 9.916 8.556 Al 5.960 5.951 7.307 Ti 0.005 0.004 0.007 Cr 0.005 0.005 0.011 Fe 0.095 0.113 0.108 Mg 0.011 0.016 0.012 Ca 2.357 2.385 3.585 Na 1.445 1.368 0.372 K 0.049 0.056 0.015 Ni 0.007 0.000 0.000 Ab 37.5 35.9 9.4 An 61.2 62.6 90.2 Or 1.2 1.5 0.4 Analyses No. 1-2: Gv-l-A rim; No. 3: Gv-1 Gv-2b 4. 5. 6. 7. 8. 49.5 46.8 47.3 48.7 52.6 28.7 30.6 30.5 29.8 27.4 0.01 0.03 0.01 0.03 0.01 0.04 0.01 0.04 0.03 0.01 0.48 0.44 0.44 0.53 0.66 0.00 0.01 0.00 0.00 0.00 0.05 0.04 0.04 0.04 0.05 15.2 17.0 16.8 15.7 12.3 2.18 1.30 1.45 2.07 3.90 0.08 0.06 0.06 0.06 0.17 0.00 0.03 0.00 0.09 0.00 96.24 96.32 96.64 97.05 97.10 9.388 8.928 8.985 9.188 9.823 6.416 6.881 6.829 6.627 6.031 0.001 0.004 0.001 0.004 0.001 0.005 0.001 0.001 0.004 0.001 0.076 0.071 0.069 0.084 0.102 0.015 0.012 0.011 0.011 0.013 3.089 3.475 3.420 3.173 2.461 0.801 0.481 0.535 0.757 1.412 0.020 0.015 0.015 0.015 0.040 0.000 0.004 0.000 0.013 0.00 20.5 12.1 13.5 19.2 36.1 79.0 87.5 86.1 80.4 62.9 0.5 0.4 0.4 0.4 1.0 A core; No. 4-8: selected analyses from traverse Table 4. CIPW-norms of clinopyroxenes and amphiboles I. 2. 3. 4. 5. 6. 7. 8. mg 71.3 76.4 83.1 87.6 65.4 68.7 70.5 81.5 il 0.61 0.91 1.06 0.61 4.55 4.55 2.45 2.04 or 0.56 0.00 0.56 0.00 2.23 2.78 2.78 4.45 ab 1.57 1.57 2.62 2.10 13.11 7.34 6.82 0.78 an 3.62 6.68 8.07 5.84 19.20 22.26 23.09 23.65 ne fCa 0.00 0.00 0.00 0.00 4.40 6.25 6.82 15.50 «j fCa 35.32 38.80 41.59 43.80 14.75 14.99 13.94 14.40 «j Mg 21.89 26.00 30.32 33.13 11.15 11.75 10.74 11.55 [Fe 11.35 9.90 7.39 6.20 2.11 1.58 1.72 1.19 hv • fMg 15.26 5.22 8.03 3.21 0.00 0.00 0.00 0.00 IFe 7.78 1.98 1.85 0.40 0.00 0.00 0.00 0.00 ol • (Mg 0.00 5.02 0.00 3.90 16.25 16.75 17.94 21.74 ol • tFe 0.00 2.14 0.00 0.50 3.26 2.55 3.36 1.62 mt 0.00 0.00 0.00 0.00 5.31 7.41 6.71 3.70 Q 0.60 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1-4: Clinopyroxenes, 1 : corresponds to the analysis No. 1, 2 to No. 3, 3 to No. 7, and 4 to No. 8 in Table 1. 5-8: amphiboles, 6: corresponds to No. 9, 7 to No. 1, and 8 to No. 24 in Table 2. An Fe 3 +/Fe 2+ ratio of o.34 (from the analysis No. 28) was assumed in every amphibole, whareas on Fe 3+ was taken into consideration in the case of clinopyroxenes.
