摘要
氨基酸溶解金的实验表明，地质体中广泛存在的氨基酸（或其他有机酸）对Ａｕ有较强的溶解能力，其中以组氨酸（碱性氨基酸）对金的溶解能力最强；温度、浓度、酸碱度及氨基酸的类型是影响配合金的重要因素。不同氨基酸对金的溶解能力都各自有不同的最佳条件（温度、浓度、酸碱度）。在ｐＨ为６－８和８０℃的条件下，氨基酸对金的溶解能力最强。氨基酸可将水体和岩石中分散的Ａｕ迁移并在合适的条件下聚集起来，在扬子板块周边微细浸染型金矿成矿过程和矿源层形成过程中起着重要作用。氨基酸官能团中的Ｎ、Ｏ、Ｓ原子可与Ａｕ形成易溶配合物。
The experiments on gold solubility in amino acid indicate that gold is very intensively solube in amino acid (or other organic acid),which is extensive in geologic bodies,and is most soluble in histidine.The temperature and concentration,acidity and type of amino acid of solution are important factors which influence complexes of gold-amino acids.The solubility of gold in amino acid is different under different conditions of temperature,amino acid concentration and pH value of solution.Under condition of 80℃ and pH=6-8,gold is most soluble in amino acid.Gold dispersed in waters and rocks could be concentrated and transfered by amino acids and then precipitate in favorable places.Amino acids might have played an important role in metallogenic process and formation of source beds of gold.Nitrogen,oxygen and sulfur in amino acid might have acted with gold to form soluble complex ions.
出处
《地球化学》
CAS
CSCD
北大核心
1996年第2期190-195,共6页
Geochimica
