NORTH-WESTERN-KORYAK VOLCANIC BELT AND ITS ore-bearing VOLCANOGENES

Abstract

We managed to reveal the North-Western-Koryak orogenic volcanic belt. Using the authors’methodology of block and key structure of lithosphere at the boundary of the regional downfold and the northern active margin of the continent we defined the mechanism of the belt volcanogenes formation. The local regional downfolds were formed at the intersection of the transverse intra-block deep faults of regional downfold lithospheric boundary and the Koryak microcontinent’s northern margin. During Oligocene tectonic-magmatic activity rocks from the crustal granitic-metamorphic layer with ore columns of gold, mercury, hurricane silver, associated with Sn deposits in basement rocks were introduced in them. The allocation of the tin-gold-silver ore regions in volcanogenic belts is proved. The trend of the belt within the margins and Chukotka gives the basis to determine the North-West Koryak metallogenic zone.