【摘要】 利用金袋热液设备，于300℃、50MPa和流动条件下（流速：7ml／h和1ml／h研究了斜长石与1mol／kgNaCl溶液的相互作用，还在同一温度压力下进行了静态实验。着重考察反应后溶液化学和长石表面化学成分的变化，以探讨钠交代作用的机理。结果表明，反应后溶液的pH值升高，Na含量降低；Si、Ca、K和Al转入溶液的特征与反应状态以及溶液流速有关；斜长石的钠交代作用涉及钙长石组分溶解和纳长石组分结晶两个过程。更多还原

【Abstract】 By using a gold-cell hydrothermal device the interaction between plagioclase and 1 mol / kgNaCl solution was studied at 300℃ and 50 MPa under flow conditions (the flow rate of solutions: 7 mL / h and 1 mL / h),and a static run was also performed at the same temperature andpressure. In order to reveal the mechanism of Nametasomatism, changes in the solution chemistryand the composition of plagioclase surface after reaction were investigated in more detail.Experimental results indicated that pH values increased and the Nacontent decreaead in the solutions after reaction,that the transformation of Si,Ca,K and Al into the solutions depends on the reactionstate and flow rate of the solutions,and that the Na-metasomatism of plagioclase involved twoprocesses:the disolution of anorthite component and the crystallization of albite component.更多还原