Researches On Comprehensive Prospecting Of The Geological Multi-Information In Gold Deposit’s Deep And Edge Area Of Jinchang Dongning County, Heilongjiang Provinc

Jinchang gold deposit in heilongjiang is one of the eurrently large operationalgold mines in China.Lots of work have been done since70s last century includinggeosciences、geophysical prospecting、geochemical exploration、Remote Sensing,and finally the surface gold mines have been found out,and parts of them have beenexploited out. In order to expand the mine prospecting achievement, it is the urgenttask for the depth of looking for concealed ore deposits and other types of concealedorebodies around the Jinchang gold ore field.In order to find out the deep hidden gold mine in the depth and margin ofJinchang gold depositin, this paper researchs the feature among the typical depositsof regional geologic background, ore-controlling conditions,Geological-Geo Phys-ical–Geochemica–Remote Sensing, alteration and mineralization,and so on; it isresearched that combining mineragenetic-epoch、ore-isotopomer and the the featureof inclusions into ore-forming setting, ore-controlling factors, ore-forming processand ore-forming products as a whole systems;by summarizing min erogenetic,comp-rehensively understanding of the forming process and spatial-temporal distributionof deposits with the vierw of minerogenetic series and ore-controlling system,andfinally the comprehensive metallogenic model of Jinchang gold ore field isestablished.On the basis of above results, with integrated electrochemical technologyas the mainstay, integrating characteristics of mining geophysical and geochemicalanomalies,the comprehensive information prospecting model for Jinchang gold orefield is established,and prospecting forecast of multivariate information of geological-Electrochemical–geophysical mthods are carried out in the depth and margin ofJinchang gold depositin, and finally the following achhivevments has been reached:1.All kinds of orebodies in Jinchang gold deposit have the characteristics of thesource of metallogenetic，ore-forming geological age and ore-controlling conditionsconsistency.Different host structure and intrusive environment led to a variety ofmorphology of orebody. Cryptoexplosion breccia orebody、the types of magmatiedomes and circular-radial orebody form in the same to metal logenetic structuresystem.2.Integrated characteristics of the hosting rule of gold ore body, combinationalzoning of alteration and mineralization, and ore-forming fluid mineralizer,it is thepreliminary view that gold deposit in Jinchang is deep porphyry formation, low-temperature hydrothermal copper-gold deposit, controlled by volcanic structureat the same time. Taking this as foundation,the deposit in Jinchang belong toporphyry gold(copper)deposit type,and initially established metallogenic model ofgold(copper)ore field.3.Through the comparative study of electrochemical data processing,it is showedthat the histogram method of electrochemical data processed is better than the trendanalysis method, which delimit the exceptions in a more obvious, continuity and isconducive to better explain the geological interpretation.4. Through the comprehensive study of the geological-geophysical-electrochem-ical abnormal profile,on the boundary of ore-controlling tectonic, form factor of thegeoelectrochemistry extraction Au is single peak with high value exception,andboths of oil ion conductivity rate exception and soil adsorption phase mercuryexception show bimodal or more peak exception features. At the top of ore body,form factor of the geoelectrochemistry exception is bimodal "rabbit ear"shaped,which abnormal strength is relatively smaller,it may be relatively to the depthof ore body buried larger on.5.According to minerogenetic and geological characteristics of Jinchang golddeposi, mainlying for electrochemical integrated prospecting, combineding with theanomaly characteristics of the known profile to geophysical and geochemicalexploration,establishing the ideal prospecting models of geological-geophysical-geo-electrochemical comprehensive information on Jinchang gold deposit.6.With the guidance of indication for prospecting and exploration model ofGeological-Geophysical–Geochemical method, comprehensive analizing thesurveyed area’s geological-geophysical prospecting-geoelectro-extration anomalycharacteristics,17prospecting targets are delineated at the gold mining area andperimeter circle in Jinchang,in which, there are5A level targets,7B level targets,5C level targets.Among them, ore and mineralizing bodies were found by projectverified in some exception targets,so it has achieved good results for mine.