酸性流体作用下斜长石的稳定性
张慧;宋土顺;刘立;符杰;刘思岚;杨国振;张贺
【期刊名称】《世界地质(英文版)》 【年(卷),期】2014(000)003
【摘要】通过紫外分光光度计分析和扫描电镜观察,开展不同温度下酸性流体与斜长石相互作用实验得出:①在低温条件下斜长石较稳定,以溶解为主;在高温条件下,斜长石不稳定,以溶蚀、溶解为主;随反应温度升高,质量损失增大。②斜长石沿解理形成条带状溶孔,沿表面形成粒内溶孔。③在160℃和190℃条件下,形成新生高岭石沉淀,温度升高高岭石晶形变好,实验反应强度增大。④随反应温度升高, K+、 SiO2和矿化度浓度升高。%The authors carried out interaction experiment of acid fluid with plagioclase under different temper -atures, through the analysis of ultraviolet spectrophotometer and scanning electron microscope .The experiment showed that①At low temperatures plagioclase is stable , which is marked by the ascendancy of dissolution;while at high temperatures , plagioclase is unstable , which gives priority to with corrosion , dissolution .As the reaction tem-peratures rise , the mass losses increase .②Plagioclase formed belt solution pores along cleavages , the surface came into being intragranular dissolved pores .③At 160℃ and 190℃, the secondary kaolinite precipitation formed , as temperatures rise kaolinite crystalline form becomes good , experimental reaction intensity increases .④With the re-action temperature rise , the