含金破碎蚀变带地面伽玛能谱特征——以吉林伊通新家地区为例

放射性方法是重要的地球物理勘查方法之一.本文以吉林省中部伊通新家地区为例，讨论了一定地质条件下含金破碎蚀变带的地面伽玛能谱特征和放射性异常组合型式，提供了放射性方法应用于金矿勘查的一个实例

CHARACTERISTICS OF GROUND GAMMA RAY SPECTRUM IN GOLD BEARING CATACLASTIC ALTERATION ZONE WITH AN EXAMPLE OF XINJIA DISTRICT,JILIN PROVINCE

Based on obtained essential data of ground gamma ray spectrum of major geological bodies in this area,the characteristics and association types of radioactivity anomaly in gold bearing cataclastic alteration zone in Xinjia district are summerized as follows 1)K type It is represended by Longwangmiao section The pattern of radioactivity anomaly association of the cataclastic alteration zone is characterized by positive anomaly of K and negative anomaly of U and Th It gradually changes to nomal field of U,Th and K outward from the alteration zone 2)K U type The pattern is made of positive anomaly of K and U and negative anomaly of Th,with fluctuating U The example is Erdaoling section 3)K U Th type It is represented by Xinjia section The pattern is characterized by positive anomaly of K,U and Th It is nomal field out of the alteration zone The types are roughly classified,but the positive anomaly of K is common,indicating a common alkaline alteration related to gold mineralization in the gold bearing cataclastic alteration zone in this area The strength of anomaly is positively correlated to alkalination The positive or negative anomaly of U or Th is maybe related to their geochemical property,pH value of medium and type of wall rock alteration