冀北等地区车载γ能谱方法找金的应用研究

车载γ能谱方法找金是寻找隐伏金矿床的物化探新技术。用它可有效地预测区域金成矿远景区。在冀北等地区（４．９１万ｋｍ￣２）采用车载γ能谱测量方法，取得地质体内６３４１６个γ能谱测点数据，按地质体大小使用滑动滤波技术，处理区域地质体中的γ能谱数据并绘制了参数分布特征图件。在深入研究γ能谱参数分布特征所反映的区域金成矿地质环境的基础上，建立了一套与区域金成矿相关的γ能谱组合参数，提取了γ能谱参数特征信息。结合地质资料，研究工作地区的金成矿地质环境，预测了两片远景区，部分地区经验证，见有金矿化。研究结果表明，车载γ能谱方法用于区域找金是一种快速、节资、有效的方法。

THE APPLICATION STUDY ON THE PROSPECTING FOR GOLD BY CAR-BORNE GAMMA-RAY SPECTROMETRIC METHOD IN NORTHERN HEBEI AND OTHER AREAS

The prospecting method for gold by car-borne gamma-ray spectrometric survey is a newgeophysical and geochemical technique in the search for concealed gold deposits which can beused to effectively predict the regional gold metallogenetic potential area. The method of carborne gamma-ray spectrometric survey was adopted and 63416 data at gamma-ray spectro.metric measuring sites from rock masses (or strata)in northern Hebei and other areas (49100km2) are obtained. On the basis of the size of geological bodies,the sliding filtering techniquewas applied to process the gamma-ray spectrometric data from regional geological bodies andmaps showing the parameter distribution characteristics were plotted (11 sheets). In accordance with the thorough study on the distribution characteristics of gamma-ray spectrometricparameters that reflect the regional geological environmet of gold metallogenesis, a set ofgamma-ray spectrometric combination parameters in correlation with regional gold metallogeneses has been established and the characteristic information of gamma-ray spectrometricparameters has been extracted. Combined with geological information,the gold metallogenetic geological environment in the working area was studied,and two potential areas were predicted. After verification,gold meneralization was encountered in some areas. The study results show that the car-borne gamma-ray spectrometric method used for regional goldprospectiong is a rapid,economical and effective one.