astenolite

On the base of computer modeling with calculation of the rock radioactivity was analyzed the behaviour of the heat fields of the central part of DDH in the beginning and in the end of the rifting stage. It was showed, that temperature conditions necessary for activity the process of eclogite metamorphism in the lower layers of the crust took place during all this stage. Another hand, for activizations of process of progressive stage of granulate metamorphism in the lower granite layers it was necessary the process of long heating of the crust during about 10 ml. years.

Using facts of rifting origin and development of Dneprovsko-Donetsky hollow (DDH), it was carried out  computer modeling of the phone temperature fields of the earth crust in the cross sections of Chernigov, Poltava and Harkov megablocks of DDH. It was showed, that visible distinctions of the temperature fields were fixed in the lower and middle parts of the crust, in the upper part, starting from 10 km layer, temperature fields were differed very little.