冀北小梨树沟地区土壤地球化学异常特征及其找矿预测

冀北地区矿产资源丰富，但第四系覆盖严重。为优选冀北小梨树沟地区的找矿靶区，在此地区开展了1：1万土壤地球化学测量工作，运用富集系数、变异系数等理论和方法，对研究区内Au、Ag、Bi、As、Cu、Pb、Zn、Mo、Mn共9种元素的测量数据进行统计分析，显示出Ag、Pb、Zn、Bi元素为研究区内有利成矿元素。运用SPSS软件对9种元素数据进行因子分析，划分出Ag-Pb-Zn-Bi、Cu-Mn、As-Mo、Au共4组成矿元素组合。计算各元素的异常下限，运用Geochem Studio软件将各类数据成图，共圈定土壤单元异常65个，组合异常4类，综合异常3处。对成矿条件较好的AP3综合异常区，采用槽探工程验证，发现并圈定了铅矿体1条、锌矿体2条。证明该异常为矿致异常，为今后在研究区及邻区的进一步勘查提供了有力的线索和依据。

Soil geochemical characteristics and prospecting prediction of the Xiaolishugou study area in northern Hebei Province

The northern Hebei region is rich in mineral resources, but the surface is heavily covered by Quaternary sediments.In order to optimize the prospecting target area of Xiaolishugou area in northern Hebei Province, the authors carried out 1: 10000 soil geochemical study in this area. By using the theory and method of enrichment coefficient and variation coefficient, the measurement data of Au, Ag, Bi, As, Cu, Pb, Zn, Mo and Mn in the study area were statistically analyzed. It shows that Ag, Pb, Zn and Bi elements are favorable ore-forming elements in the study area. SPSS software was used to carry out factor analysis on the data of nine elements, and the Ag-Pb-Zn-Bi, Cu-Mn, As-Mo and Au were divided into four mineral element combinations. The anomaly lower limit of each element was calculated and all kinds of data were mapped by Geochem Studio software. A total of 65 soil single-element anomalies, 4 types of combined anomalies and 3 comprehensive anomalies were delineated. One lead ore body and two zinc ore bodies were found and delineated in the AP3 comprehensive anomaly area with better metallogenic conditions. It is proved that these anomalies are caused by ore and provides a strong clue and basis for further exploration in the study area and adjacent area.