In this paper particle movement in a geological body is described in terms of Markovian continuous process and a probability equation for element transfer in the body is established.

• 本文把地质体中微粒运动表述为连续马尔科夫过程,建立了地质体中元素转移概率方程:把地质采样抽象为理想采样,建立了元素含量分布公式;