ORE MINERALIZATION OF THE ALIIN ORE FIELD (TRANSBAIKAL SECTOR OF THE MONGOLO-OKHOTSK OROGENIC BELT): STRUCTURAL RELATIONSHIPS, MINERALOGY, GEOCHEMISTRY AND ZONING
Goryachev N.A.1,2, Yurgenson G.A.3, Nikanyuk T.N.1,4
1 Institute of Geochemistry named after. A.P. Vinogradov Siberian Branch of the Russian Academy of Sciences (IGC SB RAS), Irkutsk, Russia.
2North-Eastern Research Institute n.a. N.A. Shilo Far Eastern Branch of the Russian Academy of Sciences (NEISRI FEB RAS), Magadan, Russia.
3Institute of Natural Resources, Ecology and Cryology, Siberian Branch of the Russian Academy of Sciences (INREC SB RAS), Chita, Russia.
4 Irkutsk Research Institute of Rare and Precious Metals and Diamonds (RI AO Irgiredmet), Irkutsk, Russia.
Keywords: gold ore deposits, mineralogical-geochemical and mineralogical-technological characteristics of ores, zoning, ore-magmatic system, Aliinsky ore cluster, Transbaikalia, Mongol-Okhotsk orogenic belt.Title
Abstract
The article presents new data on the structural position, mineralogy and geochemistry of ores for the Aliinsky ore cluster and their technological features. The mineralogical and geochemical zoning of the Verkhne-Aliinsky gold ore deposit and the entire Aliinsky ore cluster as a whole is characterized The subordination of local and horizontal zoning of mineralization within the node, localization of granitoids of the late phase of the Late Jurassic Akatuevsky complex is shown. A conclusion was made about the connection of mineralization with granitoids within the framework of a single ore-magmatic system that existed in unstable P-T-X conditions of shallow depths, transitional to near-surface. This distinguishes the Verkhne-Aliinskoye deposit from the Sredne-Golgotayskoye and Sosnovskoye deposits that are similar in composition and determined, partly, the technological resistance of its ores.
|
