V/Fe大致从底部到顶部逐渐降低，与S负相关，可用来指示Fe-oxyh

V/Fe gradually decreases from the bottom to the top, and is negatively correlated with S. It can be used to indicate the relative proportion of Fe-oxyhydroxides and Fe-sulfides. Low V/Fe and high S peaks appear in layers 8-11cm and 23-25cm. , Indicating that these two layers are relatively rich in Fe-Sulfides and poor in Fe-oxyhydroxides, so that they are greenish brown.

V/Fe is approximately lower from bottom to top, negatively correlated with S, and can be used to indicate the relative proportion of Fe-oxyhydroxides and Fe-sulfides, with V/Fe low and S high peaks at layers 8-11cm, 23-25cm, indicating that these two layers are relatively rich Fe-Sulfides, Poor Fe-oxyhydroxides, so that they are brown.

V / Fe decreased gradually from the bottom to the top, which was negatively correlated with s, and could be used to indicate the relative proportion of Fe oxyhydroxides and Fe sulfides. The peaks of V / Fe low value and s high value appeared at 8-11cm and 23-25cm, indicating that the two layers were relatively rich in Fe sulfides and poor in Fe oxyhydroxides, so that they were green brown.