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前言众所周知,在河床中重矿物趋于聚集在有利部位。在矿产勘查中,矿物的天然预富集简化了汇水盆地中是否存在重矿物(如金和锡石)的任务。然而,通常这种富集的无规
Foreword It is well known that heavy minerals tend to accumulate in favorable places in the riverbed. In mineral exploration, the natural pre-enrichment of minerals simplifies the task of collecting heavy minerals (such as gold and cassiterite) from catchment basins. However, usually this kind of enrichment is random