The alteration formed by the reaction of ore-bearing fluid and wall rock is often used as an important prospecting indicator, resulting in the dilution or enrichment of metals or related trace elements. A variety of rock-forming and metallogenic elements have been analyzed in regional stream sediments so that the relationship between the ore-bearing altered rock and the change in the geochemical elemental content can be obtained. Therefore, by using appropriate models, such as matched filtering, the abundance of the distribution of wall rock alteration, similar to the discovered deposits, can be modeled by using the distribution of geochemical elements in the region, and the areas with high distribution abundances are usually favorable prospecting targets. The alteration types related to gold mineralization in the Baiyun gold deposit are potassium feldspar alteration, silicification, pyritization, sericitization, and chloritization. In this paper, the geochemical data of the Qingchengzi ore field (1:200,000 and 1:50,000) have been used to form geochemical images through rasterization. In the three sections of the Baiyun gold deposit, binary-coded curves have been formed, revealing the differences in geochemical elements in stream sediments between altered rocks and the rocks surrounding the Baiyun gold mine. Among them, Au, W, and Mo are enriched elements, while Sn, Zn, and Hg are depleted elements. Several gold deposits are found in the predicted altered rock area by using the matched filtering method during fieldwork, which shows the effectiveness of the method.

含矿流体与围岩反应形成的蚀变常作为重要的找矿指标，导致金属或相关微量元素的稀释或富集。通过对区域河流沉积物中的多种成岩和成矿元素进行分析，可以获得含矿蚀变岩与地球化学元素含量变化之间的关系。因此，通过使用适当的模型，如匹配过滤，可以利用该区域的地球化学元素分布来模拟与已发现矿床类似的围岩蚀变分布的丰度，并将分布丰度高的区域表示为通常是有利的勘探目标。白云金矿床与金矿化有关的蚀变类型有钾长石蚀变、硅化、黄铁矿化、绢云母化、绿泥石化等。本文利用青城子矿田地球化学数据（1:200,000和1:50,000）通过光栅化形成地球化学图像。白云金矿床的三个剖面均形成了二进制编码曲线，揭示了蚀变岩与白云金矿周围岩石的河流沉积物中地球化学元素的差异。其中Au、W、Mo为富集元素，Sn、Zn、Hg为贫化元素。野外工作中利用匹配滤波方法在预测的蚀变岩区发现了多处金矿床，说明了该方法的有效性。