山东省乳山市铜锡山金矿辛家疃伽玛能谱测量

山东省乳山市辛家疃物化探异常早在６０～７０年代就已见诸于资料中，但这些异常面积一般都比较大，而且范围不够确定，不能指导工程的具体布置。近年，由于金矿资源匮乏，进一肯圈定上述异常就成为当务之急。在这方面，采用伽玛能谱测量，比较方便而且经济。经过两个阶段的测量，进一步圈出了几个有意义的异常，大大缩小了勘探靶区，达到了预期目的。此外，通过测量，对伽玛能谱测量的适用范围也有所拓宽。测区内除有基岩露头外，主

A gamma spectrum study of Xinjiatuan in Tongxishan gold deposit,Rushan,Shandong

The Xinjiatuan comprehensive anomaly in Tongxishan area has been recognized in 1960s to 1970s, but has not been well defined. In the recent years, gold resources are badly needed, therefore, the exploration of the Xinjiatuan anomaly became important. In order to focus the exploration area, the effective and convenient gamma spectrum method is applied. After two stages of measurement, several gamma spectrum anomalies are further defined, which reduce the exploration area and the data can be used as the basic document for the project of futher exploration. During the measurement, the adaptability of the method is extended. Besides the bedrock outcrop, there are mainly some basal weathered horizon, namely autochthonous overburden (about 1m, farmland or orchard) in the measurement area. The measurement shows that in the autochthonous overburden, gamma spectrum measurement can clearly define the anomaly less than a thousand square meters.