1972年夏,在加拿大地盾西北部完成了94000平方公里的普查性的地化测量(Allan等,1973)和60000平方公里的普查性的航空伽马射线测量(Richardson等,1973)。这两种方法的共同测区面积约为47000平方公里。 铀钾元素的分布形式是用这两种方法测定的。为了评价这两种普查测量方法的效果,对比了这些元素的测定结果。讨论了所用的方法,引起所得结果变化的因素和这些 In the summer of 1972, 94,000 square kilometers of census geodetic surveys (Allan et al., 1973) and 60,000 square kilometers of census aeronautical gamma ray surveys (Richardson et al., 1973) were completed in the northwestern part of Canada’s Shield. Together, these two methods measure about 47,000 square kilometers. The distribution of uranium potassium is measured by both methods. In order to evaluate the effectiveness of these two census measurement methods, the results of these elements were compared. Discussed the methods used, the factors that led to the changes in the results obtained, and these