Nonequilibrium thermodynamic model of manganese carbonate oxidation

Manganese carbonate can be converted to many kinds of manganese oxides when it is aerated in air and oxygen.Pure manganese carbonate can be changed into Mn3O4 and γ-MnOOH,and manganese carbonate ore can be converted to MnO2 under the air-aerating and oxygen-aerating circumstances.The oxidation process of manganese carbonate is a changing process of mineral association,and is also a converting process of valence of manganese itself.Not only equilibrium stat,but also nonequilibrium state are involved in this whole process,This process is an irreversible heterogeneous complex reaction,and oberys the nonequilibrium thermodynamic model,The oxidation rate of manganese cabonate is controlled by many factors,especially nonmanganese metallic ions which play an important role in the oxidation process of manganese carbonate.     

细菌对锰的氧化和聚集作用

细菌是锰矿床生物沉积过程中的主要营力。通过总结生物与锰的关系,重点评述了细菌对锰的氧化和聚集作用,并探讨了锰的微生物氧化机制;同时,分析和总结了锰结核和锰的生物沉积特征。最后得出细菌在锰的地球化学循环中起着重要作用。     

海底沉积铁锰矿床形成机制讨论

运用非线性科学理论讨论了铁锰结核和结壳形成机制,提出南极底流强度是决定结核和结壳内部构造类型的主要因素。底流运动依次由片流、静态旋涡、动态旋涡增到动态振荡,结核和结南内部构造类型相应变化为平行纹层状、柱状、多核同心圆状和不规则纹层状。在远离热力学平衡条件下,Ｍｎ２Ｏ３催化环的形成及在Ｈ＾＋离子浓度变化诱导下发生的Ｍｎ＾２＋和Ｍｎ２Ｏ３之间的周期化学反应与扩散作用的叠加是造成结核和结壳中Ｍｎ、Ｆｅ微     

贵州某地碳酸锰矿石中镍钴存在形式的探讨

贵州某地碳酸锰矿是二叠纪沉积碳酸盐型矿床。过去对该矿床锰矿石物质组成方面作过不少工作,面对其中镍,钴的分布情况了解不够。贵州某地碳酸锰矿石中含硫化物(主要是黄铁矿及部分白铁矿)约5—10%。碳酸锰矿石中含镍置平均为0．026%,钴0．008％;     

澳大利亚锰矿资源及产销概况

矿业在澳大利亚的国民经济中占有相当重要的地位，１９９０年矿业总收入竟占国民总收入的４２％。本文仅就澳大利亚锰矿储量（矿床）、加工技术、产销概况等进行粗略介绍，供有关领导和部门参考。     

河北大湾锌矿中硫锰矿与闪锌矿的成因关系

本文研究了产于河北大湾锌矿床中的硫锰矿,探讨了硫锰矿与闪锌矿的成因关系。由实验结果而认为大湾硫锰矿是从深色高锰闪锌矿中出溶而成的。     

湖南棠甘山层控锰矿床地质地球化学

The Tangganshan manganese deposit is a typical one among the stratabound manganese deposits. The proeurser is a sedimentary deposit, and later it was altered by granite activity, thus forming a multigenctic deposit as is seen at present. On the basis of its occurrence, mineral association and geochemical features, four types of manganese ore are distinguished: manganese carbonate, alabandite, manganese sillcate, and manganese oxide. Of these four types, the alabandite ore is a rare type newly discovered recently. In this paper the authors discussed in more detail this deposit from the following aspects : its geology, ore type, ore mineralogy .and geochemistry.