项目名称: 原生晕地球化学三维空间分布研究及定量成矿预测
项目编号: No.41272363
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 天文学、地球科学
项目作者: 郭科
作者单位: 成都理工大学
项目金额: 85万元
中文摘要: 原生晕地球化学方法是深部成矿预测的有效方法之一,通常的方法是在剖面上研究深部盲矿的赋存部位,难免会造成"一面之见",所采用的方案也往往以"综合分析、定性判断"为主。本课题在总结前人关于原生晕研究的基础上,提出以原生晕地球化学三维空间分布研究为基础,构建深部定量成矿预测的方法体系:以湖北省大冶铜绿山铜铁矿为研究区,从矿床形成的地球化学背景、成矿成晕的元素组合特征入手,应用人工免疫理论、分形理论、独立分量分析理论等非线性模型方法研究原生晕地球化学元素的数据特征,通过对原生晕剖面间的分形-克里格迭代插值构建原生晕三维数据体模型,该模型可实现任意方向切割剖面,可更精细的研究各方向剖面的元素空间分带性,在此基础上,总结不同深度指示元素、成矿元素的组合特征及其空间分布,结合工区地、物、遥、钻的三维异常信息,构建多元信息综合定量成矿预测模型,所取得的成果可为国家找矿战略突破提供一种新的方法技术体系。
中文关键词: 原生晕地球化学;非线性理论;三维建模;立体预测;
英文摘要: Primary halo is one of the most effective method in geochemical prediction of ore deposit. Generally, research methods are usually placing upon the location of deep blind orebodies on profile. Besides,the adoptive projects give priority to comprehensive analysis and qualitative judgment, leading to incomprehensive results .Referring to the previous work about the primary halo, deep quantitative ore-forming prediction system is constructed based on the three-dimension space distribution study. Taking the DaYe Tonglvshan Copper-iron Deposit as a work area of study , this project uses artificial immune theory, independent component analysis theory and nonlinear model to conduct research on primary halo geochemical data characteristic, which is on the basis of the geochemical background of deposit forming and the element combination characteristic of ore-forming and halo-forming. By using the method of fractal kriging iterative difference technology for primary halo and constructing three-dimensional data body model , the project can achieve cutting profile from any directions for primary halo to analyse the zoning of elements more accurately. Under this condition, spatial distribution and features of different ore-forming elements and depth indicator elements are summarized. Combined with the three-dimensional abn
英文关键词: Primary Halos;Nonlinear Theory;Three-dimensional Modeling;Three-demension Prognosis;