论文部分内容阅读
山西五台群文溪组和柏枝岩组岩石学特征和岩石化学、微量元素及稀土元素特征研究表明，这两个组中相应层位地球化学特征基本一致。递增变质作用使岩石贫Ｎａ２Ｏ、Ｋ２Ｏ及大离子亲石元素和相对富集ＦｅＯ、ＭｇＯ及铁族元素。由于变质作用仅使稀土元素总量发生微小变化，而不改变其总体分布型式，所以稀土元素是指示岩石形成与演化的良好指示剂
Petrological characteristics, petrochemistry, trace elements and rare earth elements in Wenxi Formation and Baizhi Rock Formation of Wutai Group in Shanxi Province show that the geochemical characteristics of the corresponding strata in these two groups are basically the same. Increasing metamorphism causes the rocks to be depleted of Na2O, K2O, large ionophilic elements and relatively enriched FeO, MgO and iron group elements. As the metamorphism only makes small changes in the total amount of rare earth elements without changing the overall distribution pattern, the REE is a good indicator of rock formation and evolution