稀土元素在环境中的分布分异机制，是研究其作为地球化学示踪剂的重要基础和必要前提。
The distribution and fractionation of Rare Earth element are the base for their usage as trace elements.
这些化学示踪剂用来确定生产井的生产来源，这在页岩气行业中对致力于更划算的压裂设计有重要意义。
Used to identify the source of production in a well, these chemical-based tracers may play an important role in the shale industry's effort to come up with more cost-effective fracture designs.
为了研究上新世的飓风活动情况，研究人员依靠的就代理海洋温度，这个温度是基于洋底岩芯里几种化学示踪剂变化引起的。
To investigate the hurricane activity of the Pliocene, the researchers relied on proxy ocean temperatures based on variations in several chemical tracers in drill cores of the ocean floor.
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