VENDIAN–EARLY CAMBRIAN ISLAND-ARC PLAGIOGRANITOID MAGMATISM IN THE ALTAI–SAYAN FOLDED AREA AND IN THE LAKE ZONE OF WESTERN MONGOLIA (
geochronological, geochemical, and isotope data)
S.N. Rudnev, V.P. Kovach, V.A. Ponomarchuk
Keywords: Vendian–Early Cambrian island-arc plagiogranitoid magmatism, geochronology, geochemistry and isotope geochemistry, Central Asian Fold Belt, Altai–Sayan folded area, Lake Zone of western Mongolia
Abstract
We generalize results of geological, geochronological, geochemical, and isotope-geochemical studies of the Vendian–Early Cambrian island-arc plagiogranitoid magmatism in the Altai–Sayan folded area and in the Lake Zone of western Mongolia. Based on these data, we analyzed the scales of development of plagiogranitoid magmatism, studied the petrologic composition and isotope characteristics of granitoids, and established the main sources of plagiogranitoid-generating melts and the leading mechanisms of formation of Early Caledonian juvenile crust.
|
