Experimental Study of Action of Humic Acids in the Processes of Bauxite Mineralization
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摘要: 本实验以可能是黔中铝土矿的成矿母岩的两种伊利石粘土岩为主要试样，并选择了与成矿过程有关的高岭石粘土岩和铝铁岩为实验对象，实验研究了碳酸水体系腐殖酸存在的不同条件下，上述岩样中铝、硅、铁的溶解作用；阐明了在碳酸水体系中，腐殖在成矿母岩和风化母岩脱硅、脱铁和富集铝过程中的重要作用；初步分析了腐殖酸在铝质迁移中的护胶作用；指出了腐殖酸在铝土矿形成中的重要意义。Abstract: Geological studies indicate that humic acids exsit in the total process of bauxite mineraliza-lion. In order to clarify the action of humic acids in the bauxite mineralization,in this paper in-lite clay rocks and aluminoferric rock are regarded as samples of mother rock of mineralization and red bauxixe respectively. Dissolution of Al203,SiO2 and Fe203 in the above rocks in the hu-mic acid-CO2一H2O systems of different conditions is studied experimentally. Significance of humic acid in the processes of desilication and deferridization forming red bauxite from mineral-izing mother rocks in the superfical oxidizing environment,and that of deferridization and de-silication forming white bauxite from red bauxite in swamp reducing environment are illustrat-silication forming white bauxite from red bauxite in swamp reducing environment are illustrat-ed. Importance of humic acids in mineralising gelatinous bausite is disscussed.
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[1] 1.陈履安，铝土矿形成过程中元素分异的实验研究，沉积学报，1991,9(4):87-95。
2.陈履安，贵州铝土矿成矿作用的实验研究及其成因分析，地质论评，1991,37(5);418-428。
3.高道德，石善华，贵州中部九架炉组沉积特征，贵州地质，1992,9(2):209-117。
4.Leanard J.，Bauxite, Society of Mining Engineers of America Institute Ine.，New York.1982. -
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