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文章首次报道了含不同价态金的ＮａＣｌ溶液在单向冻结条件下，其中的Ａｕ（Ⅲ）、Ａｕ（０）浓度及盐度的变化特征。实验结果表明，冻结过程中，由于“盐析作用”的结果，金元素及盐分离子发生强烈迁移，大量富集在未冻液中。在常温及零温条件下，Ａｕ（Ⅲ）稳定，Ａｕ（０）最不稳定，极易发生沉淀。表明冻土带砂金矿再生的关键可能就在于如何使金的价态发生变化，从而导致未冻液中金元素的沉淀，以及使分散在沉积物中的微细粒金进一步富集、长大。
This paper reports for the first time the characteristics of Au (Ⅲ), Au (0) concentrations and salinity in NaCl solution containing different valence states under unidirectional freezing conditions. The experimental results show that due to the result of “salting-out” during the freezing process, the gold and salt ions migrate strongly and are largely enriched in the non-freezing liquid. Under normal temperature and zero temperature conditions, Au (Ⅲ) is stable, and Au (0) is the most unstable and precipitates easily. It is indicated that the key to the regeneration of sand-gold deposits in the tundra is how to change the valence state of the gold, leading to the precipitation of gold elements in the un-frozen solution and the further enrichment and growth of the fine gold particles dispersed in the sediments .