摘要
在系统总结湖南大瑶地区金矿成矿地质条件和区域成矿规律研究的基础上,利用GIS的空间分析功能提取了包括地层、地球物理异常、地球化学元素异常、断裂缓冲区和遥感解译信息等11个证据因子,在MORPAS平台上应用证据权重法对研究区进行建模分析,圈定了三个Ⅰ级成矿远景区和四个Ⅱ级成矿远景区.研究结果表明:大瑶地区已知金矿床(点)绝大部分都位于成矿远景区,显示了良好的预测效果.该结果指明了大瑶地区今后的找矿方向,为新一轮的找矿工作提供了重要的科学依据.
The Dayao area, covering an area of 500 km2,is located in northeastern Hunan province,China. Gold deposits in this area are hosted by the Lengjiaxi Group, consisting of Mesoproterozoic metasedimentary rocks. Ore bodies occur mainly as gold-bearing quartz-vein type and altered rock type, which are controlled by fractures and ductile shear zones. Based on detailed research on the regional mineralization regularity and geological settings,multivariate favorable geological evidences such as strata,fault buffer, element abnormity of geochemistry, abnormity of geophysics and remote sensing illustration were analyzed and extracted, using the space analysis function of Geographic Information System（ GIS）. With the help of MORPAS,the weights of evidence model of the study area had been established. Three class-Ⅰ mineral perspective areas and four class-Ⅱ mineral perspective areas are predicated. Most of gold deposits were located in metallogenic prospective area showing a good prediction effect,which will surely contribute to the prospecting for gold deposits in Dayao area.
作者
黄诚
陈炳贵
陈杰强
徐春霞
甘建军
HUANG Cheng;CHEN Bing-gui;CHEN Jie-qiang;XU Chun-xia;GAN Jian-jun(College of Hydraulic and Ecological Engineering, Nanehaag Institute of Technology, Nanchang 330099, China;Guangdong Nonferrous Metals Engineering Investigation Design Institute, Guangzhou 510080, China)
出处
《地球物理学进展》
CSCD
北大核心
2018年第2期625-632,共8页
Progress in Geophysics
基金
湖南省国土资源厅"湖南大瑶-王仙地区矿产远景调查项目"(20086205)
江西省自然科学基金项目(20171BAB213027)
国家自然科学基金应急管理项目(41641023)
江西省教育厅科技研究项目(GJJ151124)联合资助
关键词
证据权重法
成矿预测
MORPAS
湘东北大瑶地区
evidence weighting method
metallogenie prospecting
MORPAS
gold deposits
Dayao area of Hunan province
