Forecast Of Lead Zinc Polymetallic Ore In Yichun Of Heilongjiang

This research, which is based on the project of"Research of Regularity of Lead Zinc Polymetallic Ore Fomation of Zhangguangcai Metallogenic Belt in Lesser Khingan of Heilongjiang", and whose prediction investigation is the superior mineral -- lead zinc polymetallic ore in Yichun-Suihua, aims to gain a clear idea of the basic situation of lead zinc polymetallic ore in the research areas and to lay mineral resources foundation for the formulation of the local economic planning and the deployment of lead zinc polymetallic ore-prospecting work.The prediction research chooses Mineral prediction method of integrated information and develops a systematic study based on the prediction method's basic principles and methods.This research, based on the priori premise of geology in the research areas, explains the same proportionable aeromagnetic survey data, gravity survey data, geochemistry data. It ascertains the characteristics and distribution rule of magnetic field, gravity field and Element geochemical field,clarifies the geological significance of geophysical field and geochemical field as well as the characteristics and distribution rule of magnetic and gravitational anomalies, geochemical anomalies and composite anomalies. It makes the geological deduction on the foundation of magnetic and gravitational information, drawing the conclusion that the structural framework of the research areas is complex; The dominant structure is nearly north-south(NE—NNE);the formation of fracture of nearly east-west is earliest ,followed by several activities in late period; based on the basic framework of the fracture structure in nearly north-south and east-west, north-west and north-east fracture structure complicates the fracture structural framework.Through the study on the typical mineral deposit of Cuihong Mountain, Xiaoxilin and Ergu, the research carries out the study of the geological background of the ore deposits'outputs ,geology of ore deposits, the cause of formation of ore deposites. It draws a conclusion that the main ore-controlling geological conditions of lead zinc polymetallic ore is medium acid magmation, fracture structure and early Paleozoic stratum in the period between late Indosinian and early Yanshan, and it also constructs the metallogenic model of lead zinc polymetallic ore of skarn.It analyzes lead zinc polymetallic ore deposit's control condition in the research areas and summarize the metallogenic regularity of the"ore deposits". The research makes out that: The volcanic deposits-- Carbonate construction formed in the Cambrian,Ordovician—Devonian,Permian is the main ore-bearing,the main geological factor of the distribution of lead zinc polymetallic ore in belts, in trip and in groups is fracture structure; the medium acid magmatic activity in the late Indosinian and early Yanshan provides thermal power,hydrotherm, mineralization and favorable structure for the formation of lead zinc polymetallic ore deposits.With the guide of typical mine,metallogenic regularity,and ore control,it establishes the mineralization pattern of lead zinc polymetallic ore deposits in the research areas. Meeting the target of geology, it studies the relationships of all kinds of information, then builds the integrated information of ore-prospecting model of lead zinc polymetallic ore deposits on the foundation of ore deposits'mineralization pattern.With the guide of integrated information of ore-prospecting model and the foundation of all kinds of information, the research ascertains the information collection of information in ore fields and divides 44 lead zinc polemetallic ore areas.The research applies several digital models in the quantitative estimate of the lead zinc polymetallic mineral resources ,such as analysis,Q cluster analysis,correspondence analysis,number theory III,support vector. It contrasts results of all kinds of methods,predicts each geological unit's probability level of ore output, including 3 A level, 9B level ,16 C level and 3 D level in the unknown unit. Based on the explanation of the prediction result, it divides ore-prospecting areas and make valuable suggestions for reference of future ore-prospecting work.