Metallogenic Prediction In Xiaoxing’ Anling-Zhangguangcailing Metallogenic Belt Based On GIS

Hei Longjiang is Located in the transfer and composite parts of the Palao Asian tectonic domain and the Circum Pacific tectonic domain,the geological structure is complicated because the tectonic development is quite obvious in multi-stage,multi-cycle and imbalance and the crust activity is strong.The Xiaoxing’anling-Zhangguangcailing metallogenic belt belongs to the suture zone of the Siberia plate(southeast edge)and the Bureya-Jiamusi plate,from east to west it goes across three second-class tectonic units which are the Xiaoxing’anling-Songnen block,the Yichun-Yanshou geosynclinal fold system and the west margin of the Jiamusi block the marginal uplift zone of the Zhangguangcailing.The tectonic evolution of Xiaoxing’anling-Zhangguangcailing fold belt has gone through the stages of the basement formation,the Caledonian period folded orogenic,the block opening and closing,the late Indosinian continental margin activities and the mid-late Yanshan period volcanic eruptions.Predecessors did a lot of research in this area.Based on summarization of the polymetallic metallogenic regularities,this paper uses the GIS as a tool to study the integrated information analysis and the prospecting prediction at the Xiaoxing’anling-Zhangguangcailing metallogenic belt.Guided by geological theory and the previous research of Au,Pb-Zn-Ag,Fe and Cu metal metallogenic regularities,the study used geological method and the GIS technology to extract mineralization favorable conditions from the geological material,geophysical,geochemical and remote sensing information.By using weight evidence model,the pluralistic favorable information was comprehensively analyzed to delineate the target ore prospecting area.This paper has:(1)Comprehensively collected and sorted existing geological and mineral data of the research area,established Au,Pb-Zn-Ag,Fe and Cu polymetallic mineralization geological model in the Xiaoxing’anling-Zhangguangcailing metallogenic belt;(2)Extracted favorable ore-forming information from the relevant strata,intrusive rocks,structure,geophysical anomaly information,geochemical anomaly information,remote sensing anomaly and ring structures.And several mineral predictive marks of this study area are established;(3)Using Weight of Evidence to estimate the Au,Pb-Zn-Ag,Fe and Cu polymetallic deposits in this area,graded the results into three degrees of vision zones.(4)Synthesizing all the vision forecast areas,we have 8 preferred prospecting targets.The prediction results can improve the accuracy and reliability of the metallogenic prediction in the research area and serve for the next work.