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黑龙江省伊春地区铅锌多金属矿产预测
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摘要
铅锌矿产研究区域的具有较大经济价值的矿产资源,在地方经济发展中占有一席之地。伴随着伊春地区经济的快速发展,矿山保有储量迅速下降,近中、长期的铅、锌多金属矿产品的供需关系日趋紧张。查清研究区域内铅锌多金属矿产资源的各种地质特征,是缓解供需紧张局面、提供中长期保障供应的可选择的有效途径。
     研究以国家地质调查局项目“黑龙江省小兴安岭—张广才岭成矿带铅锌多金属矿成矿规律研究”为平台,将综合信息矿产预测方法应用于研究区域内的铅锌多金属矿产资源的定位研究。
     研究以前期地质工作和矿产地质工作为基础,对研究区域内的地球物理、地球化学资料进行了解释,获取了有益的物化信息。典型矿床的总结性研究明确区域内具有经济意义的铅锌多金属矿床的类型——矽卡岩型。为预测工作指明了方向。分析了铅锌多金属矿成矿控制条件,实现了地、物、化信息的关联研究,构建了具有区域针对性的综合信息找矿靶区,构造出了用于铅锌多金属矿产资源位置预测的数学模型。
     对比靶区的定量估计结果,综合评价了各个单元的找矿前景。在预测成果解释基础上,对研究区今后铅锌找矿工作部署提出了建议性意见。指出清华—双兴等4个成矿远景区为首选的找矿有利地段。
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.
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