The Zarin granitic body is located in the eastern part of the Yazd Block in the Central Iran microcontinent. The granite has variable granular to mylonitic textures. New zircon U-Pb dating shows that the granitic rocks crystallized at 535–530 Ma. The pluton has high SiO₂ abundances (72.1–77.5 wt%), K₂O (4.4–6.3 wt%) and low MgO (0.2–0.7 wt%) contents, as well as high K₂O/Na₂O (1.10–1.97) and A/CNK (molar ratio of Al₂O₃/(CaO + Na₂O + K₂O)) 0.9–1.1 ratios, and is dominantly peraluminous. The granite is enriched in light rare earth elements (LREEs) relative to heavy REEs (HREEs), has negative Eu anomalies, and is extremely depleted in Nb, Ba, P, Ta and Ti. It is also characterized by variable but commonly high ⁸⁷Sr/⁸⁶Sr(i) (0.7018–0.7093) and negative εNd(i) values of −1.1 to −2.6. The geochemical features indicate that the rocks are highly fractionated I-type granite and have undergone extensive fractional crystallization of hornblende, biotite and feldspar. Results are consistent with melting of an evolved lower crust source during the subduction of the Proto-Tethys Ocean. The emplacement of the Zarin granite is contemporaneous with the extension of a Cadomian continental arc on the north side of Gondwana, that rifted away to create the Rheic Ocean to its south. Cadomian basement rocks in Iran are interpreted as an important link between western and eastern sectors of the Late Proterozoic-Early Paleozoic orogenic belts along the northern side of Gondwana, and the histories of the Rheic, Iapetus and Proto-Tethyan oceans

扎林花岗岩体位于伊朗中部微大陆亚兹德地块东部。花岗岩具有可变的粒状至糜棱质纹理。新的锆石 U-Pb 测年表明，花岗岩在 535-530 Ma 结晶。岩体具有高 SiO ₂丰度 (72.1–77.5 wt%)、K ₂ O (4.4–6.3 wt%) 和低 MgO (0.2–0.7 wt%) 含量，以及高 K ₂ O/Na ₂ O (1.10 –1.97) 和 A/CNK（Al ₂ O _{3 的}摩尔比/(CaO + Na ₂ O + K ₂O)) 0.9–1.1 的比率，并且主要是过铝质。相对于重稀土元素（HREEs），花岗岩富含轻稀土元素（LREEs），具有负 Eu 异常，极度贫化 Nb、Ba、P、Ta 和 Ti。它还具有可变但通常较高的⁸⁷ Sr/ ⁸⁶Sr(i) (0.7018–0.7093) 和 -1.1 至 -2.6 的负 εNd(i) 值。地球化学特征表明，岩石为高度分异的I型花岗岩，经历了角闪石、黑云母和长石的广泛分异结晶。结果与原始特提斯洋俯冲期间演化的下地壳源的熔融一致。Zarin 花岗岩的就位与冈瓦纳大陆北侧 Cadomian 大陆弧的延伸同时发生，该大陆弧裂开在其南部形成了 Rheic 洋。伊朗的 Cadomian 基底岩被解释为连接冈瓦纳北侧的晚元古代-早古生代造山带的东西部分与 Rheic、Iapetus 和原始特提斯洋的历史的重要纽带