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选择有大量次生方解石沉淀的海底蚀变玄武岩为研究对象,研磨、均一化后将粉末样品分为49份,其中48份分别以0.25,0.5,1.0,1.5,2.0,2.5 mol/L 6种浓度的足量HCl溶解0.5,1,2,4,8,16,32,64 h,选取溶解残渣测定其主要氧化物和特征微量元素含量,研究确定HCl溶解法去除海底玄武岩中次生组分的浓度—时间组合。结果表明,1.0 mol/L-0.5 h,1.0 mol/L-1 h,1.0 mol/L-2 h,1.0 mol/L-4 h,1.5 mol/L-0.5 h,1.5 mol/L-1 h,2.0 mol/L-0.5 h,2.0 mol/L-1 h和2.5 mol/L-0.5 h等9种HCl浓度—时间组合是可供去除海底蚀变玄武岩中次生碳酸盐的理想方案。
Seabed alteration basalt with a large number of secondary calcite precipitates was selected as the research object. After grinding and homogenization, the powder samples were divided into 49 parts, of which 48 were treated with 0.25, 0.5, 1.0, 1.5, 2.0 and 2.5 mol / L The concentration of HCl was dissolved 0.5,1,2,4,8,16,32,64 h dissolved residue was selected to determine the main oxides and trace elements content to determine the HCl dissolution method to remove the secondary components of the seafloor basalts Concentration-time combination. The results showed that 1.0 mol / L-0.5 h, 1.0 mol / L-1 h, 1.0 mol / L-2 h, 1.0 mol / L-4 h, , 9 kinds of HCl concentration-time combinations of 2.0 mol / L-0.5 h, 2.0 mol / L-1 h and 2.5 mol / L-0.5 h are the ideal solutions for removing secondary carbonate from seafloor alteration basalts.