MINERAGENIC TYPE OF ORE OCCURANCE VERKHNEE-ZOLOTOE: RESULTS OF PETROGRAPHIC INVESTIGATION
The aim of the investigation was to revise the lithology of volcanic and volcano-sedimentary rocks which form the Verkhnee-Zolotoe copper ore occurance (Russia, Primorie region) and obtain new data on it's mineragenic type. We have made petographical investigation of 70 thin sections and 19 polished, taken from the core from diamond-drilling wells. These wells were drilled in 2014 by the N-Mining LLC. Results of our work on both thin and polished sections are that volcanic and volcano- sedimentary rocks (mainly andesite tuffs, andesites) from Sinancha complex and secondary alterations in them as well are suitable for conditions of growing of a copper porphyry system on the peripherals of the stratovolcano. The composition and sequence of veinlet formation are alike as in the copper porphyry system as well. Copper and base metal mineralization in the veinlets, intersection of only not ore - bearing subvolcanic bodies by sampled drilling wells are reasons to assume the area of the investigation to the boundary part of copper porphyry system with base-metal and copper mineralization in the epithermal veinlets [28]. The main result of carried out work is that there is a chance of recognition the Verkhnee- Zolotoe ore occurance as a copper porphyry, as well as a VMS to copper porphyry transitional type.