花崗岩类岩石中高溫碱貭蝕变作用的研究,在近年具有特别重要的意义,因为許多稀有金属如Nb、Ta、Zr、Hf、TR、Th等的工业富集与之密切相关。根据目前比較流行的見解,这些元素在岩浆期后溶液中最可能是呈碱貭絡合物进行迁移的,当发生碱貭蝕变交代时,由于溶液碱貭減少,酸度升高,于是引起稀有元素的絡合物分解而沉淀集中。因此,花崗岩的碱貭蝕变被认为是稀有元素矿床重 The study of high-temperature Alkalinity alteration in granitic rocks has been of particular importance in recent years as the industrial enrichment of many rare metals such as Nb, Ta, Zr, Hf, TR, Th and others are closely related. According to the prevailing opinion at present, most of the elements in the solution after the magmatic period are alkali-base complexes that migrate. When alkalosis alteration occurs, the acidity increases as a result of the reduction of the alkalophilicity of the solution, resulting in a rare The elemental complex decomposes and the precipitate concentrates. Therefore, the alkalinity alteration of granite is considered to be a rare element deposit