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该实验尝试了一种从沉积岩中分离提纯自生粘土矿物的方法:反复冷冻-解冻法。其改进之处在于利用渗透于岩石样品中的水,在冷冻的情况下体积膨胀,而使岩石颗粒自然散开。实验的大部分岩样用改进的岩样碎样法分离出的粘土矿物,经扫描电镜及X-射线衍射分析鉴定证实,在<1μm粒级时,粘土组分中不含有碎屑的钾长石,而常规法无法达到这一点。另外,随着分离粒级的减小,粘土组分中碎屑伊利石的含量逐渐减少,在<0.2μm时,大部分组分中碎屑伊利石的含量<5%,有的已不含碎屑伊利石。
The experiment tried a method of separating and purifying self-generating clay minerals from sedimentary rocks: repeated freezing-thawing method. The improvement is that the water infiltrated in the rock sample expands in volume while freezing, leaving the particles of the rock naturally dispersed. Most of the rock samples were tested by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results showed that clay particles with no detritus Stone, and conventional law can not achieve this. In addition, the content of detrital illite in the clay fraction gradually decreased as the separation fraction decreased, and the content of detritus in most of the fractions was less than 5% at <0.2 μm, Debris Illite.