前言苏联从1965年开始进行生物地球化学勘探。从设想(1920～1965年)到实际应用,并发现了4个矿床(1978—1982年),之所以经历如此长的过渡阶段的主要原因是:有关生 Foreword The Soviet Union began its biogeochemical exploration in 1965. From the idea (1920-1965) to the practical application and the discovery of four deposits (1978-1982), the main reason for having experienced such a long transitional period is that the relevant students