【作者】 赵龙；

【导师】 温守钦； 任群智；

【作者基本信息】 东北大学 ， 矿产普查与勘探， 2007， 硕士

【摘要】 辽宁省位于华北地台北缘东段,跨两个一级大地构造单元,以赤峰一开原断裂为界,南侧为华北地台区,北侧为内蒙—大兴安岭褶皱系和吉黑褶皱系。区内铁矿众多,铁资源储量为居全国首位。铁矿类型以太古宙硅铁建造型(鞍山式)铁矿为主,兼有其他类型的铁矿床。本文在总结前人对辽宁省铁矿床研究成果的基础上,将辽宁省分为鞍本地区和辽西地区二部分进行区域成矿研究。鞍本地区铁矿床以鞍山式铁矿为主,分布较为集中,矿床规模较大；辽西地区铁矿床类型多样,分布零散且矿床规模较小。本次研究,通过提取区内大地构造、断裂构造、地层和岩浆岩等地质背景信息,结合矿区地质资料,综合分析了辽宁省铁矿床矿床赋存层位和成矿地质环境。在对区内各类型典型铁矿床解剖分析,发掘其成矿有利条件的基础上,结合矿床地质特征、物探异常特征等找矿标志,建立了辽宁省铁矿的找矿模式。证据权法是加拿大数学地质学家Agterberg提出的一种地学统计方法。它通过对矿产资源相关的地学信息的叠加分析进行预测,其中每一种地学信息都作为预测的一个证据因子,而每一个证据因子对矿产资源预测的贡献由其权重值确定。基于GIS的证据权重法矿产资源预测的优点是数据驱动、易于编程实现,在矿产资源预测中已有很多成功的应用。本文以辽宁省区域找矿模式为基础,应用MAPGIS及ACCESS软件,建立了辽宁省区域地质应用数据库,采用证据权法数学预测模型对辽宁省进行区域铁矿的成矿预测,划分出辽宁省的重点成矿区及成矿远景区。研究表明证据权法用于铁矿床的成矿预测结果可靠性较高。并为辽宁省内进一步寻找铁矿床提供了依据。更多还原

【Abstract】 Liaoning province is located in the east section of northern fringe of North China field platform, strides over two first grade geotectonics element and takes that Chi Feng-Kai Yuan breaks as boundary, the south is North China field platform area on the side, the north is Neimeng-Naxinganling wrinkle system and Jihei wrinkle system. Iron mine is the main resource in the area and iron resource reserves take the first place in China. The type of iron mine is mainly of Archean Ferrosilicon, simultaneously including other type of iron mineral deposit.Based on the research results of the iron ore deposit of predecessors in Liaoning Province, Liaoning province was divided into two parts in this thesis, that is, Anshan-benxi area and Liaoxi area. The type of iron ore deposit is main of the Anshan type in Anshan-benxi area, it occured more concentratedly and as larger scale deposit. Iron ore types are many kinds of in the Western of Liaoning, and scattered anywhere and the size of deposits was small usually. With the geological information of the earth tectonic structure, the tectonic fault, stratigraphy and magmatic rocks in the research area,combining mine geological data, the occurrence of the deposit and geological environment were fully analyzed. By analyzing the typical types of iron deposits, the mineralization conditions what are valuable for various types of iron deposit was discovered. With the geological and geophysical anomaly characteristics, the prospecting model of Liaoning Provincial iron ore was established.Evidence weight modeling is a geographical statistical method, which is brought forward by Agterberg who is Canadian geologician.It analyses and predicts the deposits based on information of superposition related to mineral resources. Put each factor as evidence, and the contribution of evidence is determined by the weights. The merits of evidence weight modeling are data-driven and easy. And there been many successful applications in prediction of mineral resources.The stratigraphy and geophysical anomalies was put as the evidence layers in this study, the Anshan Iron-prospecting forecast area was gained and with good result.As a foundation of the region prospecting pattern of Liaoning province, with MAPGIS and ACCESS software, the regional geology application database has been established, The mathematic forecast model of evidence weight modeling was used to carry on the mineralization forecast of the region iron ore in Liaoning province. The key mineralization area and prospecting area were given out. The research indicates that the mineralization forecast of iron deposit with the evidence weight modeling had good reliability, and provides the further evidence for searching iron ore deposit in Liaoning province.更多还原