info:eu-repo/semantics/article
METALLOGENIC PROCESSES IN THE EARLY HISTORY OF THE EARTH
METALLOGENIC PROCESSES IN THE EARLY HISTORY OF THE EARTH
Autor
KAZANSKY, V. I.
Institución
Resumen
Comparison of geological and gcochronological data reveals two different trends in the development of continental crust in the Archean and Early Proterozoic: 1) consecutive consolidation of Archean cratons with the formation of protoplatform, 2) their destruction by superimposed tectonic movements which caused development of Proterozoic mobile belts and regions of protoactivization. The evolution of the continental Earth crust in the Early Precambrian was accompanied by regular changes in geoological environments favourable for ore formation. In Archean supracrustal belts the most important ore mineralization is associated with submarine volcanism and postmetamorphic hydrothermal activity in protoactivization regions - with intrusion of layered and ring complexes, metamorphic and metasomatic processes. Comparison of geological and gcochronological data reveals two different trends in the development of continental crust in the Archean and Early Proterozoic: 1) consecutive consolidation of Archean cratons with the formation of protoplatform, 2) their destruction by superimposed tectonic movements which caused development of Proterozoic mobile belts and regions of protoactivization. The evolution of the continental Earth crust in the Early Precambrian was accompanied by regular changes in geoological environments favourable for ore formation. In Archean supracrustal belts the most important ore mineralization is associated with submarine volcanism and postmetamorphic hydrothermal activity in protoactivization regions - with intrusion of layered and ring complexes, metamorphic and metasomatic processes.