【作者】 陈刚；

【导师】 杨兴科；

【作者基本信息】 长安大学 ， 地学信息工程， 2008， 硕士

【摘要】 随着信息技术的发展,矿产勘查己经步入数字化、定量化研究的新阶段。地理信息系统(GIS)作为多学科交叉的产物,能够对具有空间结构的信息进行高效的管理、分析和成果输出。因此,随着GIS技术的不断成熟,它己经广泛的应用在地学的众多方向,并在成矿预测与评价方面发挥着重要的作用。本文以MAPGIS为平台,在野外实地工作的基础上,结合该区的地质条件与地质背景,对旬阳县幅地质图及有关的地质资料进行整理、归纳、分析,根据地质实体的特征(属性)进行图层划分,并按照图层对图形进行数字化,然后将数字化的图件进行误差校正、比例变化和地质内容的取舍,建立了研究区的1∶5万地质图形数据库;依据关系数据模型抽象出不同图层地质实体的特征(属性),建立了图形相关的属性数据库。同时也将旬阳县幅地球化学图件也进行了数字化录入、误差校正等处理,地质图形数据库、与图形相关的属性数据库和化探图形数据库组成该区的地学空间数据库。在空间数据库的基础上,利用MAPGIS空间分析功能,进行多要素、多层次空间迭加分析,研究地质和化探等综合信息与矿产的关系,总结矿床的找矿标志信息,形成了研究区的成矿预测空间分析模型,圈定了找矿靶区。本文通过矿床(点)与断层、岩石地层和综合异常的迭加分析,确定找矿标志系数,提取出其成矿有利单元。根据研究区地层岩石分布、地质构造特征、区域地球化学异常信息等多源地学信息综合提取找矿信息以及研究区内己发现的矿点,依据各成矿有利区的圈定中进行区对区的迭加分析,共圈定出5个找矿靶区:分别为黑山湾铅锌找矿靶区、火盆垭北铅锌找矿靶区、庙砠子西重晶石找矿靶区、丁家湾东重晶石找矿靶区和金河口锌重晶石找矿靶区。更多还原

【Abstract】 With the development of information technology, mineral exploration has been into digital, quantitative study of the new stage. Geographic Information Systems GIS, as the product of more interdisciplinary, can be efficient management, analysis and output of information with spatial structure. Thus, with GIS technology continues to mature, it has been widely used in the study of the many directions, and plays an important role in Mineralization forecast and evaluation.To MAPGIS as a platform, on the basis of the wild-spot inspection, combining with geological conditions and geological background of the area, firstly ,this paper coordinates, concludes and analyses the Xunyang geological map and the geological data involved, and divides layers according to the characteristics (properties ) of geological entities, and digitals graphics after the error correction, the ratio of geological changing and the choice of content, constitutes a 1:50 000 geological graphics database of study area; then abstracts entities (attribute) of different layers of the geological characteristics based on relations data model, establishes a database of attributes related to graphics. It will also increase Xunyang geochemistry map after digital and error correction, so, such as graphics geological database, attributes database and geochemical database builds up the spatial database.On the basis of spatial database, using spatial analysis functions of MAPGIS, this paper has accomplished multi-element and multi-level spatial superimposition analysis, and researched the relations of the mineral and integrated information about geological and geochemical, summed up the deposit prospecting signs, formed a study area Mineralization forecast spatial analysis model, designed of the prospecting target.On the basis of superpositions between deposit(point) and the fault, rock formation, and comprehensive abnormal, this paper determines the signs coefficient of the prospecting and extracts mineralization fault fovorable unit. According to the rock formation and geological structural characteristics, regional geochemical anomalies, such as multi-source information of study area, learning comprehensive information extraction and prospecting information on the region have found the mine, based on area to area superimposition analysis in the designing of the favorable mineralization, five exploration target have been determined : the Heishanwan Pb-Zn target, the north of Huopenya Pb-Zn target, the west of Miaozuzi Barium target, the east of Dingjiawan Barium target, the Jinhekou Zn-Ba target.更多还原