【摘要】 同一时代不同类型侵入体的铀、钍、钾含量不同 ;不同时代同种侵入体的铀、钍、钾含量也不同 ,而且有侵入时代由早到晚 ,含量由低到高而变化的规律。该文讨论用 γ能谱法现场测量铀、钍、钾含量 ,确定侵入体相对时代的原理 ,并给出研究区花岗岩和闪长岩侵入时代的划分结果。更多还原

【Abstract】 Different types of intrusive bodies have different contents of U, Th and K, that is, the later the intrusive age, the higher the contents of U, Th and K. Gamma ray spectrometry method can survey all these parameters in time on the spot. So that the gamma ray spectrometry method can determine the age of an intrusive body. This paper discusses the principle to divide the relative age of an intrusive body by the gamma ray spectrometry method. The division of the relative ages of granite and diorite from the study area are given.更多还原