Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 56. (Budapest 1964)

Csalogovits, J. I.: The non-magnetic derivation of Atlantic and Mediterranean rock-provinces and their connection with orogenic metamorphism

2.) Na caolinite -» brammallite paragonite in which K remaining in the pelites in the course of the growing metamorphosis forms a phase 1), whereas phase 2) is the water migrating away from the metamorphites, and the Na-system forms a zeolite fades, on the one hand in the synorogenic magmatic phases (lugaritic magmatic zeolite facies) on the other hand in metamorphites of a lower pressure state (zeolitic epimetamorphic facies), and at the same time the dehydrated metamorphite of a higher pressure becomes of the K-type. From another aspect, if the dehydration caused by orogenic compression, being an exponential function, shows a linear correlation with the Na migration, • +05 Fig. 2: Correlative and regressive index alteration characterising the stochastic functionconnexion of Na,0— FI

2

0 contents of essexite rocks in the function of the pressure value, expressedby D-depth 1. Correlative coefficient; 2. Regressive coefficient then that is too an exponential function; or rather a diffusion process differing from the dehydration only by its coefficient, thus the relation C

Na

2

0 = C

o

Na2

o e~

X2

°

(p) may also be applied for water containing sediments. As a result of the K

2

0

—H

2

0 correlation calculation, in conformity with genetic considerations r

A = —0,3; r

HA

= 0,007; r

s

= —0,13, no correlation can be traced for the abyssic — hypabyssic — subvulcanic — vulcanic types (Fig. 2); On basis of their mineral and chemical compositions the essexite-types may be divided into the undermentioned types: A B Na

2

0 = many Na

2

0 = manv H

2

0 = little H

2

0 = many K

2

0 = average K

2

0 = little nepheline analcime Olivine + Ti augit Ti augit Flittle biotite Na amphibole biotite