对单矿物建立重砂地球化学图、异常图；
Maps of geochemistry and abnormality about single mineral of schlich have been established.
也有少数是天然单矿物集合体，如玛瑙、欧泊。
There is also a single mineral collection, such as natural agate, opal.
另一种解释出现单矿物蒸发岩的假说是假定存在分隔的蒸发盆地。
Another hypothesis to the existence of monomineralic evaporites is to assume the existence of separate basins of evaporation.
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