trace element typomorphic characteristics 微量元素标型特征
combinating characteristics of trace element 微量元素组合特征
Characteristics of trace element geochemistry 稀土微量元素地球化学特征
The high pressure source mineralogy signaled by Andean adakite trace element characteristics originates in three ways.
由这种岩石的痕量元素特征揭示的高压组成矿物，表明其有三种可能的成因。
Therefore, the element ratios can be applied to the study of trace element characteristics of rocks in the tholeiite source region.
因此研究拉斑玄武岩源区岩石中的微量元素特征可以采用元素比值的方法。
The trace element characteristics of Cambian-Ordovician carbonates in Bachu area of Tarim basin are studied, and their enrichment mechanisms are discussed.
研究了塔里木盆地巴楚地区寒武-奥陶系海相碳酸盐岩的微量元素特征，探讨了微量元素的富集机制。
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