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对岩矿标本退磁改正误差进行了分析讨论,指出岩矿标本的NΚ’近于1时,退磁改正系数很大且不稳定,视磁化率(Κ’)的误差和退磁系数(N)的误差,经退磁改正后会引起更大的磁化率(Κ)误差和剩余磁化强度(Jr)误差,甚至可能得出磁化率(Κ)和剩余磁化强度(Jr)为负值的错误结果,导致磁参数难以用于磁测资料解释推断。提出应尽可能采集规整的岩矿标本并提高磁参数测定精度,减小视磁化率的误差和退磁系数的误差,以确保获得可用于磁测资料解释推断的磁参数。
The errors of demagnetization correction in rock and mine samples are analyzed and discussed. It is pointed out that the demagnetization correction coefficient is large and unstable when the NK ’of rock and ore samples is close to 1, and the errors of apparent susceptibility (Κ’) and demagnetization coefficient (N) , Which leads to larger error of magnetic susceptibility (Κ) and residual magnetization (Jr) after correction by demagnetization, and may even lead to the wrong result of negative value of magnetic susceptibility (Κ) and residual magnetization (Jr) Parameter is difficult to use in magnetic data interpretation inference. It is proposed that regular samples of rock and mine should be collected to improve the accuracy of magnetic parameters measurement and to reduce errors of apparent susceptibility and error of demagnetization coefficient so as to ensure that magnetic parameters can be obtained for inferential interpretation and interpretation of magnetic data.