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安徽沿江地区硫铁矿资源调查评价
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摘要
在全面、系统收集和研究安徽沿江地区各个硫铁矿床地质背景、成矿环境、成矿特征资料的基础上,将我省硫铁矿床分为火山-次火山气液型硫铁矿、接触交代型硫铁矿、热液型硫铁矿和沉积热液改造型硫铁矿四种,并选择不同类型硫铁矿床的典型矿床,分析其地质特征。通过对不同类型硫铁矿床的总结分类,结合我省沿江地区特殊的构造条件和成岩成矿特征,对构造、地层和岩浆岩与成矿的关系进行总结。
     通过上面对我省硫铁矿床成矿规律的总结,建立我省不同类型硫铁矿床预测模型,利用MapGIS、Morpas、MRAS等GIS平台软件,分别根据属性提取地层、构造、岩浆岩、重力异常、航磁异常、Fe元素异常信息,建立信息图层,并分别用上述信息图层与硫铁矿床进行空间分析,结合第三、四章内容内对地质信息的总结,统计分析其与硫铁矿床分布关系,最终确定不同类型硫铁矿的预测图层,即预测要素。最后,采用特征分析法,确定各个预测要素权重系数,对我省不同类型硫铁矿资源进行成矿远景预测,并对远景区进行分级和评价。
On the base of collecting and researching of the geological background, the metallogenic environment and the metallogenic characteristics of the the pyrite deposits along the Yangtze River in Anhui, we divide the pyrite deposits into four types,including the volcanic gas-liquid-type, the contact metasomatic type, the hydrothermal type and the reworked sedimentary type. Then we chose the typical deposit of each type of the pyrite deposits, and then we analysis the geological features of each typical deposits, summary the relationships between the stratum,the structure,the magmatic rocks and the pyrite deposits.
     Then ,first we establish the prospecting model, extract the information of the stratum,the structure, the magmatic rocks, the gravity anomaly,the aeromagnetic anomaly and the geochemical anomaly of the Fe, then establish the information layers.Second we count the relationships between the information layers and the layer of the pyrite deposits,then determine which are the forecasting layers.At last ,we count the weights of evry forecasting layers with the analysis method, then we forecast the prospect area of each type of the pyrite deposits, analyse and calssify the proapect area.
引文
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