图  3  基于砷元素约束的地球化学内生因子识别模型

输入外源观察变量为Rb、F、Li、Nb、Sn、Zr、Ti、Cu、Pb、Zn、Th、Ag、Sb、Au、W；外源潜变量为LV1-LV3，Rb、Cu、(Au、W)分别为潜变量LV1、LV2、LV3独有识别元素，其他元素为三个潜变量的共有输入元素；LV4为内源潜变量，其外源观察变量为As；外源潜变量LV1-LV3分别代表了成矿物质运输通道、成矿有利元素的赋存地层以及与成矿有关的岩浆作用

Figure  3.  Geochemical endogenous factor identification model based on arsenic constraints.The input external observation variables are Rb, F, Li, Nb, Sn, Zr, Ti, Cu, Pb, Zn, Th, Ag, Sb, Au, W. The latent exogenous variables are LV1-LV3. Rb, Cu, (Au, W) are the unique identification elements of the latent variables LV1, LV2 and LV3 respectively, and the other elements are the common input elements of the three latent variables. LV4 is a latent endogenous variable, and its exogenous observed variable is As. The latent variables LV1, LV2 and LV3 respectively represent the ore-forming transport channel, the stratum where the related elements of ore-forming occur, and the magmatism related to ore-forming.