Research On The Geological Characteirstics And Structural Control Of Hadamengou Gold Deposit In Mongolia

Hadamengou is located in the Wulashan gold anticline core complex, South Wing, isremoved from the mantle branch sub-band, Indo-rock of large birch back east, is the largegold deposits in central Inner Mongolia region, is altered fracture Rock-type gold deposit.In the long geological history of the evolution process, the district formed a series ofmulti-stage, multi-stage system of folds and faults, the formation and evolution of the goldcontrol plays an important role.This article in full use on the basis of previous data, the proposed mantle branch of thenew perspective, through the geological characteristics, material source, ore-controllingstructures, metallogenic regularity, genesis and other aspects of research, analysis of theHadamengou gold geological features and the role of structural control, these featuresindicate that:1. By rock and mineral samples by the determination of stone mining, ore-formingage reached240±2Ma, slightly earlier than the age of large birch back rock220±8Ma,the mantle-crust mixed into the mineral source, mineralizing solution mainly frommagmatic water, as well as some atmospheric water added.2. Mining complex structural conditions, strictly controlled production ore veinstructure constraints, but the significance of the structural control are not consistent. Thetectonic evolution, mainly through Hercynian, Indosinian, Yanshan period, which may begold Hercynian initial enrichment, Indo-forming stage of the main.3. Major source of birch back between the rock and the lower crust and upper mantle,between the upper mantle partial melting, with a multi-phase nature, causes part of thesame type granite melt. Tai Hua back in time and space rock is closely related with thedeposits, can provide part of the forming material and heat.4. Into the Triassic Mesozoic, tectonic activity frequently, due to the uplift and theformation of plume mantle branch detachment zones and the corresponding forming aseries of (to a certain spacing between) EW detachment to the secondary zone and NWZhang fracture to cross. The main detachment zone substantially larger extension of thedetachment and deep, and deep a certain temperature and pressure conditions, the magmaalong the main detachment zone activities, and for the subsequent deep mines to open thechannel and the provision of liquid mineral storage space also activated the early formationof the EW tectonic fault systems, the late hydrothermal ore up along the new fracturesoccurred during the account and rock alteration and transfer of part of the early activationof the gold, along with a consistent correlation structure is weak in and gather ore.