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本文通过两种不同成因海泡石化学成分特征的研究发现，热液型海泡石和沉积型海泡石的化学组成有较大差异，热液型纤维状海泡石ＭｇＯ、ＳｉＯ２含量高，Ａｌ２Ｏ３含量低，为富镁海泡石；沉积型粘土状海泡石ＭｇＯ、ＳｉＯ２含量低，Ａｌ２Ｏ３含量高，为富铝海泡石。而且，两种不同成因的海泡石结晶形态的差异与其化学组成密切相关；热液型海泡石Ｍｇ２＋、Ｓｉ４＋高，Ａｌ３＋低，接近理想值，易结晶形成长纤维状；而沉型积海泡石Ｍｇ２＋、Ｓｉ４＋较低，Ａｌ３＋高，结晶颗粒细小，为粘土状，但在电镜下观察仍呈纤维状。
In this paper, the chemical compositions of two different sepiolites are found. The chemical compositions of hydrothermal sepiolite and sepiolite are different. The content of hydrothermal fibrous sepiolite MgO and SiO2 is high. Al2O3 The low content is magnesium-rich sepiolite; the sedimentary clay-like sepiolite has low MgO, SiO2 content and high Al2O3 content, and is rich in aluminum sepiolite. Moreover, the difference in the crystal morphology of sepiolite with two different origins is closely related to its chemical composition; the hydrothermal sepiolite Mg2+, Si4+ is high, and Al3+ is low, close to the ideal value, easy to crystallize to form long filaments; Fused Mg2+ and Si4+ are lower, Al3+ is high, and the crystal grains are fine and clay-like, but they are still fibrous under electron microscope.