Structurally-petrologi features bazitovy intrusives complexes, perspective of Cu-Ni deposits (the west of the Siberian platform)

Complex of geologic-geophysical works including drilling was held in the Siberian platform’s northwest. Powerful intrusion traps were taped; some of them also include stratified structure and have a potential of the Norilsk type Cu-Ni ores bearing. Intrusion is a basic structurally-forming factor of this complex geoblock. Executed intrusion correlation made it possible to separate and trace the extension on drilling radius of four intrusion types: katangskiy, kuzmovskiy, agatskiy and first-selected onekskiy with holminskiy subtype (Prusskaya, 1993). It was established that constituent of onekskiy orogenic complex is characterized by boss chonolith intrusions’ presence and difficult dendrite dikes named intrusion’s apophysis. It is peculiar framework igneous complexes and volcanostructure. The main feature of intrusive complexes locating within the Tanachy-Moktakonskaya zone is their connection with sublatitudinal and submeridional deep-earth fractures’ intercepts. Number of positive local structures, which were mapped by seismic exploration within Tanachy-Moktakonskaya zone, should be considered as typical volcano-structures. They are made with explosive material, including subvolcanic intrusions as well as huge stratified intrusions (onekskiy type). The sheath saturation sedimentary of intrusive complexes (including huge stratified rocks) is from 19 to 45 %. Formation of Tanachy-Moktakonskaya zone layered intrusions as well as onekskiy complex was a consequence of deep mantle processes that contributed to intrusive complexes formation, which have potential of the Norilsk type copper-nickel ores bearing.