一、引言花岗岩中铀的配分及其铀在蚀变过程中再分配的研究,对探讨铀的来源及铀矿床成因占有重要位置。长期以来,国内外地质人员通过各种方法进行配分研究。如单矿物分离法,核乳胶照相法及α径迹法等。这些方法各有其不足及局限性。近年来,裂变径迹法在地质科学中已经得到广泛的成用。用诱发裂变径迹法测定铀的灵敏度很 I. INTRODUCTION The distribution of uranium in granite and its redistribution of uranium in the alteration process are of great importance to the study of the origin of uranium and the genesis of uranium deposits. For a long time, domestic and foreign geologists have conducted research on the allocation of ingredients by various methods. Such as single mineral separation method, nuclear latex and alpha-track method. Each of these methods has its own limitations and limitations. In recent years, fission track method has been widely used in geosciences. Sensitivity of uranium determined by induced fission track method