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一般矿石中所含的铅多属普通铅。由于普通铅在测定矿石年龄,研究矿床成因、矿质来源、成矿时代、演化历史、成矿环境,以及找矿勘探等方面,具有特殊重要的意义,所以引起国内外研究者的广泛注意。近十年来,这方面的研究工作进展较快,相继出现了不少新的理论和假说,提出了普通铅年龄计算的新方法。本文介绍的是正常铅与异常铅的同位素演化理论及其计时方法。
Most of the lead contained in ore are mostly ordinary lead. The common lead has attracted a great deal of attention from researchers both at home and abroad due to its special significance in the determination of ore age, study of the genesis, mineral origin, mineralization age, evolution history, metallogenic environment and prospecting. In recent ten years, research work in this area has been progressing rapidly, and many new theories and hypotheses have appeared one after another, and a new method for calculating the age of ordinary lead has been put forward. This article describes the theory of isotope evolution of normal and anomalous lead and its timing method.