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在安大略省的班克罗夫特地区试验了利用镭~(226)的地球化学特性普查铀矿的方法,并且将此方法与利用氡和铀的普查方法进行了比较。把取得的沉积物样品、土样和风化岩石样品进行了镭~(226)和铀的分析,对水样则分析了氡~(222)和铀。沉积物中的镭和铀较水中的氡和铀更有利于普查。碎屑沉积物和有机沉积物两者均有用,但碎屑沉积物更有用。在进行沉积物测量时,镭和铀两者都有用;在进行中等比例尺普查时(土壤分析),A 层和 B 层中的镭和铀都有用;在详细普查时,除在 A 层中不能利用铀外,其它都有用。在风化作用下,铀比镭更充分地从岩石中被淋滤出去,因此,如果取的是风化岩石样品,那么分析镭比分析铀更有利。
A method for the census of uranium deposits using the geochemical characteristics of radium (226) was tested in Bancroft, Ontario, and the method was compared with the census method using radon and uranium. The sediment samples, soil samples and weathered rock samples were analyzed for radium 226 and uranium, and radon 222 and uranium for water samples. The radium and uranium in sediments are more favorable to censuses than radon and uranium in water. Both detrital and organic deposits are useful, but detrital sediments are more useful. Both radium and uranium are useful in sediment measurements; radium and uranium in both layers A and B are useful at medium scale censuses (soil analyzes); at the time of the detailed census, except in layer A Use of uranium, the other is useful. Under weathering, uranium is leached more fully from the rock than radium, so it is more advantageous to analyze radium than to analyze uranium if a weathered rock sample is taken.