Discriminating barren and fertile intrusions is one of the main challenges in the search for rare-element pegmatites. Diagrams comprising more than one element can make discrimination of productive and barren samples more valid. These diagrams distinguish samples by simultaneous means of positive and/or negative correlations between variables. A ternary diagram for S-type peraluminous granites has been obtained in this study. Firstly, a database composed of Ta-bearing and barren granitic systems was created, then geochemical behavior of trace elements was studied, and statistical investigations were done using GCDkit software, which resulted in the Ga-(Nb+Ta)-(Nb/Ta)(Zr/Hf) ternary diagram which can distinguish the non-mineralized granites from productive ones. The Ta-bearing samples, which are situated in the fertile field in the diagram, are those which have high Nb and Ta contents, elevated Ga content and the lowest Nb/Ta and Zr/Hf values.

中文翻译：

---

Ga-（Nb + Ta）-（Nb / Ta）（Zr / Hf）三元图：区分贫瘠和含钽花岗岩-伟晶岩系统的绝佳工具

在寻找稀有元素伟晶岩时，区分贫瘠和肥沃的侵入岩层是主要挑战之一。包含多个元素的图表可以使对生产性样品和贫瘠样品的区分更加有效。这些图通过变量之间的正相关和/或负相关的同时手段来区分样本。在这项研究中获得了S型铝质花岗岩的三元图。首先建立了由含钽和贫瘠花岗岩系统组成的数据库，然后研究了微量元素的地球化学行为，并使用GCDkit软件进行了统计调查，得出了Ga-（Nb + Ta）-（Nb / Ta （Zr / Hf）三元图，可以区分非矿化花岗岩和生产性花岗岩。含钽样品位于图中的肥沃田地中，