V/Fe is approximately decreased from bottom to top, and is negatively correlated with S, which 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 they are brown.
正在翻译中..