We report geochemical data of apatites from Mesozoic granitoids in the northeastern North China Craton (NCC), and discuss the relationship between apatite and whole-rock compositions with the aim of using apatite geochemical data to constrain granitoid petrogenesis. Measured Sr contents and Sr/Y ratios of apatites exhibit positive correlations with those of their host rocks, and ε_Nd(t) values of apatites display a strong linear relationship with ε_Hf(t) values of zircons in the granitoids. In addition, apatites exhibit similar rare-earth element (REE) distribution patterns with their host rocks, although apatites have much higher REE contents. Sr/Y–Y variation diagram for apatite is proposed to distinguish adakitic rock from non-adakitic. The REE patterns of apatites, together with other geochemical indexes, can also be used to discriminate highly fractionated granitoids from unfractionated I-type granite or other type granite. The geochemical and Nd isotopic compositions of apatites have well revealed the magma source of Mesozoic granitoids in the northeastern NCC. In conclusion, we highlight that apatite geochemistry reflects the whole-rock geochemical characteristics of granitoids and has the potential to track granite detritus.

我们报告了华北克拉通东北部中生代花岗岩中磷灰石的地球化学数据，并讨论了磷灰石与全岩成分之间的关​​系，目的是利用磷灰石地球化学数据来限制花岗岩类岩石的成因。测量锶含量和磷灰石的SR / Y比值表现出正相关与这些寄主岩的，和ε_的Nd（吨）磷灰石的值显示与ε很强的线性关系_的Hf（吨）中的锆石值。此外，尽管磷灰石具有更高的稀土元素含量，但磷灰石与它们的宿主岩表现出相似的稀土元素（REE）分布模式。提出了磷灰石的Sr / Y-Y变化图，以区分埃基质岩石和非埃基质岩石。磷灰石的REE模式以及其他地球化学指标，也可以用于区分高度分级的花岗岩与未分级的I型花岗岩或其他类型的花岗岩。磷灰石的地球化学和Nd同位素组成已经很好地揭示了东北NCC中生代花岗岩的岩浆源。总之，我们强调磷灰石地球化学反应了花岗岩的整个岩石地球化学特征，并具有追踪花岗岩碎屑的潜力。