NEW TYPES OF GOLD-BEARING STRUCTURES AND ROCKS IN ORE FIELDS OF THE WESTERN MONGOLIA-OKHOTSK COLLISIONAL SUTURE

Abstract

The Kariisky, Pil’nensky, and Pogromny gold deposits of the Shilka branch and the Ilinsky and Dybyksinsky deposits of the Onon-Tura branch of the Mongolia-Okhotsk Suture belong to the nappe-thrust type of ore fields. New types of gold-bearing structural elements are tectonic polymictic melange, serpentinite melange, autoclastic melange, losange (rhomb-shaped strike-slip duplexes), and mineralized sutures of low-amplitude thrust faults and detachments. It was established that such rocks of the dynamometamorphic complex as mylonites, cataclasites, pseudotachylites, and tectonic breccias may be gold-bearing.