摘要
根据现有的热力学数据计算,AuCl_2^-是预富集阶段金在矿源层中迁移的主要形式,而Au(Hs)_2^-则在热液成矿阶段起主要作用,计算表明,α_(Cl)->10~0的酸性含氯溶液以及α_(ΣS)>10^(-2)的富硫热液可分别作为预富集阶段和热液成矿阶段金的主要地球化学指标。
Calculations based on the available thermodynamic data of AuCl2- and Au(HS)2- indicate that AuCl2- is responsible for the transport and enrichment of gold during the stage of pre-concentration in the source bed while Au(HS)2- is the main gold species involved in the formation of gold deposits in response to hydrothermal reworking. Acid chloride solutions with acl- >10° and sulfur-rich solutions with a∑s. in excess of 10-2 are held as important criteria for gold enrichment in the source bed and for the formation of gold deposits by subsequent hydrothermal event, respectively.
出处
《地球化学》
CAS
CSCD
北大核心
1992年第2期114-124,共11页
Geochimica
