The first geochemical data were obtained on rock of the Goloustnaya block i
n the southern framing of the Siberian Platform. It was established that th
e early (relict) metavolcanic rocks display geochemical features characteri
stic of analogous rocks from island-are environments and active continental
margins. The leucocratic granites, which account for as much as 80% of the
exposed block area, are principally different geochemically from the seemi
ngly similar medium- and fine-grained granites of the second phase in the P
rimorskii Complex. The granites of the block were determined to be geochemi
cally similar to one of the granitoid types of Priol'khon'e, which had been
formed under elevated pressures in the so-called Chernorudskaya zone. It i
s suggested that the Goloustnaya block was a tectonic slab in the imbricate
d structure of the southern surroundingsof the Siberian Platform. This stru
cture resulted from Caledonian collisional events in the area.