Late Precambrian–Early Paleozoic igneous rocks constitute volumetrically minor components of the Iranian Plateau but preserve important information about the magmatic and tectonic history of the northern Gondwana margin. The Chadormalu intrusions are part of Central Iran, which includes Late Precambrian–Early Paleozoic continental crust that is now embedded in the Alpine-Himalayan orogenic system. New zircon U-Pb and Sr-Nd-Pb isotope data and whole-rock geochemical analyses are presented on gabbroic to granitic rocks of the Chadormalu district to constrain the magmatic history of the Cadomian orogeny in a disrupted fragment of the northern Gondwana margin. The geochemical data identify I-type calc-alkaline magmatism with typical continental-arc features. The laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) U-Pb zircon ages range from 531.1 ± 1.6 Ma to 539.8 ± 2.2 Ma, consistent with previous data on the Cadomian basement of Central Iran, and document Early Cambrian subduction and extension along northern Gondwana. Whole rock Sr-Nd isotope data for gabbro (ɛNd_i= 0.4; i stands for initial; t = 533 Ma) and granites (ɛNd_i= -3.6 to -3.0; t = 531–539 Ma) along with radiogenic Pb isotope data attest to melting of older continental crust triggered by mantle melts. The subduction regime was followed by slab retreat ± delamination in an extensional environment which allowed Ediacaran-early Cambrian flare up of magmatism along the northern Gondwana margin at a regional scale.

晚前寒武纪 - 早古生代火成岩构成了伊朗高原体积较小的组成部分，但保留了有关冈瓦纳北部边缘岩浆和构造历史的重要信息。Chadormalu 侵入体是伊朗中部的一部分，其中包括晚前寒武纪 - 早古生代大陆地壳，现在嵌入阿尔卑斯山 - 喜马拉雅造山系统。新的锆石 U-Pb 和 Sr-Nd-Pb 同位素数据和全岩地球化学分析对 Chadormalu 区的辉长岩到花岗岩进行了分析，以限制冈瓦纳北部边缘破碎碎片中 Cadomian 造山运动的岩浆历史。地球化学数据确定了具有典型大陆弧特征的I型钙碱性岩浆作用。激光烧蚀电感耦合等离子体质谱 (LA-ICP-MS) U-Pb 锆石年龄范围为 531.1 ± 1.6 Ma 至 539.8 ± 2.2 Ma，与伊朗中部加多纪基底的先前数据一致，并记录了早寒武纪沿冈瓦纳大陆北部的俯冲和延伸。辉长岩的全岩 Sr-Nd 同位素数据 (ɛNd_我= 0.4；我代表首字母；t = 533 Ma) 和花岗岩（ɛNd _i = -3.6 至 -3.0；t = 531–539 Ma）以及放射性 Pb 同位素数据证明由地幔熔化引发的旧大陆地壳熔化。俯冲机制之后是板片退缩 ± 在拉伸环境中的分层，这使得埃迪卡拉纪早期寒武纪岩浆作用沿着冈瓦纳北部边缘在区域范围内爆发。