Metallogenic Prognosis By Multi-information Including Geology-geoelectrochemical-geophysical Exploration In Ⅰoerfield's Deep And Edge Area Of Jinchuan

Jinchuan copper-nickel sulfide ore deposit located in Jinchang city Gansu province. It is one of the famous polymetallic copper-nickel sulfide ore deposits in the world, also is china's nickel city. The recourse of nickel and platinum group element ranks first in china, the recourse of copper and coblet ranks the second in china, and up to now, a great variety of associated polymetallic species in search of domestic and international research is rare. The discovery and development of Jinchuan copper-nickel sulfide ore ends the history lack of nickel and coblet. After discovery and development for decades, The recourse of copper-nickel sulfide ore deposit are reducing, in order to keep the mine sustainable development. Currently, carrying out into deep and edge exploration has been to be the urgent task.Combining the scientific research, this paper studys the achievements of past generations, by on-spot geological investigation and assembling the geological material, sums up the metallogenic regulation and carry out the metallogenic prognosis by multi-information including geology- geoelectro-extration–geophysical exploration inⅠoerfield's deep and edge area by NE side, and finaly the following achhivevments has been reached:1. the ore deposit formed in the environment of continental margin rift system, metallogenesis experienced a long period process of geological evolution. ore-baering mother rock is compound intrusive ultrabasic rock, and has been devided into four intrusive periods.2. this paper analyzed the elements plane anomaly charactristic of geoelectro-extration, then made the relenvent analysis, clustering analysis and factor analysis by software spss, dissgused geochemistry charateristics about mining elements association, metallogenesis and periods, on this basis to determine the assemblage anomaly of geoelectro-extration. At last, Comprehensive Analyzing the anomaly of ionic conductivity of soil and the assemblage anomaly of geoelectro-extration, then the geoelectrochemical comprehensive anomaly has been determined.3. under the situation of contorling the rock and ore petrophysical charateristics, using the TEM and high degree magnetic measurement to do the geophysical exploration. By the analysis, deduced that there is a hidden ultrabasic rock, and has been devided into five low resistance anomaly which appeard plus magnetism anomaly varying in size and strong or weak and many other geochemistry anomaly.4. on the basis of deteimining the exploration mark and comprehensive analyzing the known profile's geological-geophysical prospecting- geoelectro-extration anomaly, established a exploration model more suit for geological-geophysical prospecting- geoelectro-extration multi-information.5. with the guidance of exploration model, comprehensive analizing the surveyed area's geological-geophysical prospecting- geoelectro-extration anomaly charateristics, and delineated 10 exploration targets, in which, there are 3 A level targets, 3 B level targets, 4 C level targets.