Abstract
As a result of the analysis of 3D-distributions of density contrast in the crust of the South Sikhote-Alin, connections are established between ore districts, ore clusters, and ore fields, on the one hand, and hierarchically subordinate structures of the central type of three taxonomic levels, on the other. Based on the coincidence of the areas of spatial distribution of ore mineralization with the projections of deep density heterogeneities, the probable depth of occurrence of fluid-magmatic sources of ore mineralization and vertical extent of ore-magmatic systems of different specialization were determined: tin (depth of 2‒6 km), tin-polymetallic (4‒12 km), polymetallic (6‒20 km), and gold-tungsten (14‒24 km). The spatial distribution of central-type structures and the associated areas of ore mineralization are coincident with viscous shear zones, within which subsidence of the crustal upper layer is observed (Samarkinsky terrane, Kavalerovsky district and Soboliny ore cluster), as well as displacement of the contours of density heterogeneities in different depth sections (Dalnegorsky region). Deep boundaries of the ancient continental crust and Mesozoic island-arc wedges subducted under accretionary-fold complexes were determined. The joint of these structures is characterized by distinct features of a transform fault.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
