在地球科学领域，同位素地球化学研究作为不可或缺的重要手段离不开同位素分析技术，而同位素分析最基础最重要的组成部分就是目标元素的化学前处理。目前非传统Fe-Ca同位素分析分别采用阴-阳离子交换树脂分离技术，而传统Sr-Nd-Hf同位素分析的化学分离则是基于两种以上树脂的组合(如SR-TRU-LN萃淋树脂)，因此非传统Fe-Ca联合传统Sr-Nd-Hf同位素分析的多目标元素的化学分离过程无疑非常的繁琐费时。本项目将采用DGA树脂进行目标元素Fe-Ca-Sr-Nd-Hf的上柱实验，发现其被树脂同时吸附的条件参数。被DGA树脂吸附的目标元素进行可分离性实验，发现其分离参数，实现单柱多目标元素的分离纯化，建立非传统-传统同位素联合分析方法。新建Fe-Ca同位素联合方法应用于缅甸高分异花岗岩，测定其非传统-传统同位素数据，揭示花岗岩源区特征，并进一步探讨其成因及其与Fe-Ca同位素变化之间的内在关系。

In the field of geoscience, isotopic geochemistry as an indispensable important tool is essentially dependent upon isotopic analysis techniques, whose vital foundation is related to the chemical pretreatment for separation of target elements. Currently, non-traditional Fe-Ca isotopes are analyzed after the target elements have been separated using anion- and cation- exchange resins, respectively whereas traditional Sr-Nd-Hf isotopes are analyzed after the target elements have been separated using more than two resins (e.g. SR, TRU and LN extraction resins). Definitely, the separation of multi-target elements regarded to non-traditional Fe-Ca isotopes with inclusion of traditional Sr-Nd-Hf isotopes can be considered very tedious and time-consuming. In this project, we will attempt to investigate the absorptive behaviors of Fe-Ca-Sr-Nd-Hf by the DGA resin and find their simultaneous absorption by the resin column. The target elements absorbed by the DGA resin will be investigated for their separability from the DGA resin. Based on these experiments, a method for separation of multi-elements using a single resin column will be developed for analysis of non-traditional Fe-Ca isotopes coupled with traditional Sr-Nd-Hf isotopes. Via the application of this method to highly fractionated granite samples from Myanmar, the data of both non-traditional and traditional isotopes will be determined, and they will be used to reveal its source characteristics and further explore its origin and internal relation with the change in Fe-Ca isotope compositions.