硫在岩浆熔体中的溶解行为综述  

REVIEW OF THE SOLUBILITY BEHAVIOR OF SULFUR IN MAGMATIC MELT

作　　者：朱永峰[1] 

机构地区：[1]北京大学地质学系

出　　处：《地质科技情报》1998年第2期35-38,共4页Geological Science and Technology Information

基　　金：国家自然科学基金

摘　　要：对火山放气过程中硫行为的研究是研究岩浆氧化状态及估算火山排气量的一种有效手段。硫在硅酸盐熔体中的溶解行为与其氧化状态紧密相关，硫在硅酸盐熔体中的溶解度取决于氧逸度、硫逸度和Ｏ２－在熔体中的行为，且熔体中硫的溶解度与其中水的含量呈反比关系。常压条件下硫在熔体中的溶解度与ＳｉＯ２的含量呈反比关系，在还原环境中硫在熔体中的溶解度与熔体中ＦｅＯ含量呈正相关。在氧化性岩浆中硫的溶解度较高，这可能是硫自地幔或下地壳迁移至近地表火山环境中的有效机制。It is an effective measure to study the oxidizingstate of magma and to estimate the degassing volatiles of volcano through sulfur behavior during magma degassing.Sulfur solubility in magma is strongly dependent on the oxidizingstate of magma,which relates to the oxygen fugacity,sulfur fugacity,and O2-,solubility in magma.Sulfur solubility increases with the decrease of water content in magma,and at atmospheric pressure increases with the decrease of SiO2 content in magma.Sulfur solubility in magma increases with increase of FeO content under the reduced condition.Sulfur solubility is relatively high in more oxidizing magma,so this may be the effective mechanism for sulfur transporting from deep to Earth′s surface.

关 键 词：溶解度 硫 岩浆溶体 溶解行为 

分 类 号：P588.11[天文地球—岩石学]