金矿勘查中的伽玛能谱测量--以黑龙江乌拉嘎金矿外围柳树河区为例

金成矿受岩性、构造及蚀变控制,蚀变使含矿构造破碎带与围岩出现放射性差异,因此可应用伽玛能谱测量进行金矿勘查.为了提高黑龙江乌拉嘎金矿外围柳树河区的金矿勘查效果,利用伽玛能谱对该异常区进行了扫面测量.通过该项研究表明了含矿构造破碎带的存在及成矿流体中低温矿化的特点;在矿化带上方钾及总道显示高值异常,而铀道显示低值异常:证明应用该方法找金的有效性.需要指出的是,不同地区和不同类型矿床伽玛能谱的特征参数是不同的.

Gamma-ray Spectrometry in Exploration of Gold Deposit: A Case Study from Wulaga Gold Mine in Heilongjiang Province

Gold deposits are controlled by lithology,structure and alteration.The alteration may result in radioactivity difference between ore bearing structure zone and the wall rock.Therefore the gamma-ray spectrometry may be used in gold deposit exploration.Gamma-ray spectrometry survey made in the outer region Liushuhe area of Wulaga gold mine in Heilongjiang Province is taken as an example in which the ore bearing structure zone is revealed and the characteristic on the mineralization liquid at middle to low temperature is indicated.Potassium(K) and the total channels appear high anomalies on the mineralization zone while uranium(U) shows low anomalies.The overall results prove that spectrometry is effective in gold exploration in the study area.It is necessary to point out that gamma-ray spectrometry may be characterized differently over different exploration area and different deposit types.