摘要
根据云南金顶铅锌矿床成矿的地质和物理化学条件,以及国内外一些地区卤水性质的研究结果,拟定了4个热卤水体系,于一定的温度和压力条件下,对金顶铅锌矿区围岩中的铅和锌,进行了热卤水萃取的实验研究。实验结果表明,含有氨基酸的热卤水,能更有效地萃取围岩中的铅和锌,其最佳萃取温度为150℃;只含NaCl的热卤水对围岩中铅和锌的萃取作用随温度升高而增加;围岩中的锌比铅更容易被萃取而进入溶液。通过这种萃取作用,足以产生成矿所必需浓度的卤水,其矿质浓度可达到几至十几(g/t)。据此,作者认为矿区的碎屑岩层有可能为矿床的形成提供数量可观的物质来源。
According to the conditions of geology and physico-chemistry in Jinding lead-zinc deposit, and characters of hydrothermal brines in the world, four hydrother-mal brine systems are set in the laboratory. Under the definite temperature and pressure produced by the vessel, experimental studies are made with temperature and time chosen as variable separately. It shows that the brines containing amino acids extract etements of the country rocks more strongly than those without amino acids, and amino acids are advantageous for lead and zinc to concentrate in the brines. 150℃ is the best temperature for extraction of brines with amino acids. Brines with pure NaCl extract zinc and lead of country rocks more strongly as the temperature rises. Extacting of brines is associated with the forms of lead and zinc in the rocks, if the contents of lead and zinc soluted by hydrochloride are high, the extracting efficiency will be high too. The brines extract zinc more easily in comparison with lead, so the extracting efficiency and the concentration of ore-forming brines with sufficient metals can be obtained in the laboratory. A great quantity of metals (Pb and Zn ) might be provided by the clastic rock stratum in Jinding.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1991年第2期181-188,共8页
Earth Science-Journal of China University of Geosciences
关键词
铅锌矿床
铅锌
活化
迁移
热卤水
Jinding strata-bound lead-zinc deposit, hydrothermal brine, ami- no acids, extraction, ore-forming brine.
