北领地Carpentaria矿权区多元地学信息集成与锰矿勘查目标分析

发布时间：2018-03-01 06:07

本文关键词： GIS 澳大利亚锰矿　出处：《东华理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：本文依托“中钢集团北领地Carpentaria矿权区锰矿勘查”项目,以地质、重力、航磁、航空能谱、遥感、VTEM等多元地学数据为基础,以“数据收集、处理、建库—成矿要素提取—异常提取—锰矿勘查目标分析”为总体思路,通过GIS平台对多元地学数据进行综合处理和分析,并将多元地学数据系统集成制作分类专题图层,建立“北领地Carpentaria矿权区多元地学信息专题GIS系统”,开展锰矿勘查目标分析。1、构建了“北领地Carpentaria矿权区多元地学信息专题GIS系统”,该系统包括1个野外地质调查点专题、2个矿床(点)专题、1个矿权区专题、2个图幅索引专题、3个钻孔信息专题、8个地质数据专题、2个重力专题、18个航磁专题、12个航放专题、20个遥感专题、200个VTEM数据专题,其为该地区地学专题制图、多元信息融合分析奠定了基础。2、根据Carpentaria矿权区勘查资料分析,该地区不存在白垩系浅海台地-泻湖相沉积地层,相应地层岩性表现为陆地河流相,不宜将Groote Eylandt沉积型锰矿作为本区的主要勘查类型。3、区域地质演化及钻孔数据分析表明,该地区存在元古代Roper群碎屑岩和Karns白云岩,已发现一些与其界面相关并受同生断裂构造控制的浅成热液型锰矿,应参照该类型锰矿的典型代表——西澳Woodie Woodie锰矿进行分析和探索。4、在上述研究的基础上,提取地质、钻孔、重磁、航放、遥感、VTEM等多元地学异常信息,开展找矿阶段的“澳大利亚北领地Carpentaria矿权区多元地学信息处理与融合分析”。5、多元地学异常信息提取结果显示,矿权区锰矿化位于高重力异常的边缘,并具有偏高磁场特征;航放数据揭示EL26539中部及边缘、EL26556东南部存在热液流体运移;遥感蚀变信息提取结果显示,锰矿-羟基-铁基蚀变组合在EL26539西南部和东部表现强烈,而碳酸根-铁基蚀变组合在EL26539北东部、EL26556西部以及EL26557西南角表现强烈;VTEM数据显示,在EL26539西南部存在带状磁性导体异常。矿权区总体呈现构造分割的地质块体特征,磁性导体异常带与其分区地质构造具有很好的一致性。6、研究结果表明,Carpentaria矿权区EL26539西南部是Roper碎屑岩/Karns白云岩界面与陡倾断裂交汇复合部位,同时为重磁分带(区)和遥感蚀变异常组合分区结合带,并表现为VTEM磁性导体异常带的区段,可作为该矿权区主要的锰矿勘查靶区。
[Abstract]:Based on the project of "Exploration of Manganese deposits in Carpentaria Mine right area of Northern Territory of China Iron and Steel Group", based on the multivariate geoscience data such as geology, gravity, aeromagnetic, aeromagnetic energy spectrum, remote sensing and VTEM, this paper is based on "data collection and processing," The general idea is to build the database, extract the ore-forming elements, extract the anomaly and analyze the target of manganese exploration. Through the GIS platform, the multivariate geoscientific data are comprehensively processed and analyzed, and the multi-geoscience data system is integrated to make the classified thematic map layer. The "GIS system of multiple Geoscience Information in Carpentaria Mining right area of Northern Territory" was established, the analysis of manganese exploration target was carried out, and the "GIS system of multiple Geoscience Information Topics in Carpentaria Mining right area of Northern Territory" was constructed. The system includes one field geological survey site. Topics, 2 mineral deposits (points), 1 mineral right area, 2 map index, 3 borehole information, 8 geological data, 2 gravity, 18 aeromagnetic, 12 aerial emission, 20 remote sensing, 200 VTEM data, It laid a foundation for geo-thematic mapping and multi-information fusion analysis in this area. According to the exploration data of Carpentaria mining right area, there is no Cretaceous shallow platform and lagoon facies sedimentary strata in this area, and the corresponding stratigraphic lithology is characterized by terrestrial fluvial facies. Groote Eylandt sedimentary manganese deposit should not be regarded as the main exploration type in this area. The regional geological evolution and borehole data analysis indicate that there are clastic rocks and Karns dolomite in the Proterozoic Roper group in this area. Some epithermal manganese ore related to its interface and controlled by syngenic fault structure have been found. The analysis and exploration should be made with reference to the typical representative of this type manganese deposit, the Woodie Woodie manganese deposit in Western Australia. On the basis of the above research, the geology is extracted and the borehole is drilled. Gravity and magnetic field, aerial emission, remote sensing, VTEM and other multivariate geoscience anomaly information, "multivariate geoscience information processing and fusion analysis in Carpentaria mining right area of Northern Territory of Australia" .5. the result of extraction of multivariate geoscience anomaly information shows that, Manganese mineralization in the mining right area is located at the edge of high gravity anomaly and has the characteristics of higher magnetic field, the aeronautical emission data reveal that hydrothermal fluid migration exists in the middle and edge of EL26539 and the southeast of EL26556, and the result of remote sensing alteration information extraction shows that, The manganese ore-hydroxy-iron base alteration assemblage is strong in the southwest and east of EL26539, while the carbonate-iron base alteration assemblage is strong in the north and east of EL26539 and in the west of EL26556 and in the southwest corner of EL26557. There are zonal magnetic conductor anomalies in the southwest of EL26539. The magnetic conductor anomaly zone is in good agreement with its regional geological structure. The results show that the southwestern EL26539 of Carpentaria mining right area is the compound position of the interface of Roper clastic rock / Karns dolomite and steep dip fault. At the same time, it is a combined zonation of gravity and magnetic zonation and remote sensing alteration anomaly, and it is shown as the section of VTEM magnetic conductor anomaly zone, which can be used as the main exploration target of manganese ore in this mining right area.
【学位授予单位】：东华理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.32;P631

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