内蒙古配种站地区化探异常特征及找矿潜力分析

发布时间：2018-05-02 13:35

本文选题：地球化学异常 + 数据处理　；参考：《石家庄经济学院》2015年硕士论文

【摘要】：研究区位于内蒙古自治区东北部,属于大兴安岭中段,地质矿产勘查程度较低。本区是内蒙古自治区少数几个未进行1:20万化探扫面的地区,化探资料匾乏。本次1:5万土壤地球化学测量既可拟补本区化探资料的不足,又可为本区找矿工作提供依据。本文首先对土壤元素的丰度特征和土壤元素的分异特征做了系统的分析:土壤中元素浓集系数大于1的元素为Bi、W、Pb、Sn,说明这些元素在土壤中分布比较聚集,土壤中变异系数大于1的元素为Bi、W、Ag、Mo、Pb、Zn,说明这些元素在土壤中分布不均匀,有富集的趋势。为了更有效的突出弱异常,更合理的得到背景值以及异常下限值,本文采用了迭代法来求得背景值以及异常下限值,并通过Q-Q概率图验证了该方法的可行性。最后结合实际地质情况确定了研究区的背景值和异常下限值。利用Surfer软件绘制了10种元素地球化学异常图。通过研究发现:大多数元素具有多个异常区其中W、Pb元素异常规模最大、具有浓集中心最多、强度最强。大多数元素异常主要分布于研究区北东方向的早白垩世侵入岩与下侏罗统红旗组地层接触带附近,该处形成了多个元素的浓集中心。对土壤地球化学元素的共生组合特征进行了分析。其中Ag与Bi、Sn、W、Cd相关性好,相关系数为:0.747、0.620、0.746、0.717,其中Ag与Bi相关性最好。通过R型聚类分析和主成分分析将10种元素分类为2种组合类型,F1为W-Sn-Bi-Ag组合,F2为Zn-Pb-Cd组合。其中W-Sn-Bi-Ag组合是研究区主要成矿元素组合。Zn-Pb-Cd组合是与成矿伴随的元素组合。通过分析区域成矿地质条件和元素组合异常特征,最后建议2处具有较大找矿潜力区域。
[Abstract]:The research area is located in the northeast of Inner Mongolia Autonomous region, belongs to the middle section of Daxing'an Mountains, and the geological and mineral exploration degree is low. This area is a few areas of Inner Mongolia Autonomous region without 1: 200,000 geochemical survey surface, geochemical data is scarce. This 1: 50 000 soil geochemical survey can not only make up for the shortage of geochemical data in this area, but also provide the basis for prospecting in this area. In this paper, the abundance characteristics of soil elements and the differentiation characteristics of soil elements are systematically analyzed. The elements whose concentration coefficient is greater than 1 in soil are Bianwang PbSn, which shows that these elements are distributed and clustered in soil. The elements with a coefficient of variation greater than 1 in the soil were Bianwang AgMoZN PbZN, which indicated that these elements were distributed inhomogeneously and tended to be enriched in the soil. In order to outshine the weak anomaly more effectively and get the background value and the lower limit value of the anomaly more reasonably, the iterative method is used to obtain the background value and the lower limit value of the anomaly, and the feasibility of the method is verified by the Q-Q probability diagram. Finally, the background value and the anomaly limit value of the study area are determined according to the actual geological conditions. The geochemical anomaly maps of 10 elements were plotted by Surfer software. It is found that most elements have multiple anomalous regions, among which the largest anomaly scale, the largest concentration center and the strongest intensity are found. Most of the element anomalies are mainly located near the early Cretaceous intrusive rocks in the north and east direction of the study area and the stratigraphic contact zone of the Red Flag formation of the Lower Jurassic, where the concentration centers of many elements are formed. The symbiotic assemblage of soil geochemical elements was analyzed. There is a good correlation between Ag and Bi-Sn-Sn-W ~ (+) CD, the correlation coefficient is 0. 0. 747 ~ 0. 620 ~ 0. 746 ~ 0. 717, among which Ag and Bi have the best correlation. By means of R-type clustering analysis and principal component analysis, 10 elements were classified into two combinations: W-Sn-Bi-Ag F _ 1 and W-Sn-Bi-Ag F _ 2 for Zn-Pb-Cd combination. Among them, W-Sn-Bi-Ag assemblage is the main metallogenic element assemblage. Zn-Pb-CD assemblage is associated with metallogenic elements. By analyzing the geological conditions of regional metallogenesis and the anomalous characteristics of element assemblages, it is suggested that the second place has great prospecting potential.
【学位授予单位】：石家庄经济学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P632

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