Ophiolitic mélange that forms along convergent plate margins plays an important role in reconstructing the tectonic evolution of ancient orogenic belts and associated geodynamic settings. However, ophiolitic mélanges have rarely been documented in the Archean and Paleoproterozoic geological records, which led to the controversy surrounding the onset or not of plate tectonics at that time. Here we present an integrated study of petrography, geochemistry, zircon U-Pb-Lu-Hf isotope, and metamorphic P–T estimations on the newly-recognized 2.12–2.03 Ga ophiolitic mélange that contains amphibolite and serpentinite blocks in the North Kongling Complex (NKC), northern Yangtze Craton to better constrain the tectonic evolution of the northern Yangtze Craton and prevailing geodynamic backgrounds. The amphibolites and serpentinites in the mélange exhibit slightly-enriched light rare earth elements (LREEs), large-ion lithophile elements (LILEs, e.g., Rb, Ba) and negative high field strength elements (HFSEs, e.g., Nb, Ta, Zr, Hf, and Ti) anomalies, suggesting their derivation from a subarc mantle wedge metasomatized by slab-derived fluids/melts. The mafic–ultramafic components likely represent the dismembered fragments of a ca. 2.12 Ga suprasubduction zone (SSZ) arc/forearc complex. The garnet amphibolite underwent intermediate T/P metamorphism at ca. 2.03 Ga, with a clockwise P–T path. The estimated (near) peak P–T conditions of ∼10.1–10.6 kbar/660–670 °C correspond to thermobaric ratios of ∼625–635 °C/GPa, consistent with subduction-collision-related geothermal gradients. Collectively, the mélange recorded an intra-oceanic subduction-accretion event at ca. 2.12 Ga and subsequent collision at ca. 2.03 Ga. In combination with regional geological data, the accretionary-to-collisional orogenic events in the NKC of the northern Yangtze Craton could be a response to global-scale convergence and assembly of the Paleoproterozoic supercontinent Nuna/Columbia. The Paleoproterozoic (2.12–2.03 Ga) ophiolitic mélanges and orogenesis in the northern Yangtze Craton thus support the operation of the modern-style plate tectonic regime at that time.

沿会聚板块边缘形成的蛇绿混杂岩在重建古代造山带的构造演化和相关的地球动力学环境中起着重要作用。然而，太古宙和古元古代地质记录中鲜见蛇绿混杂岩的记载，这导致了当时关于板块构造开始与否的争议。在这里，我们提出了对岩石学、地球化学、锆石 U-Pb-Lu-Hf 同位素和变质P-T 的综合研究对新发现的 2.12-2.03 Ga 蛇绿混杂岩体的估计，该混杂岩包含扬子克拉通北部北孔岭杂岩 (NKC) 中的角闪岩和蛇纹岩块，以更好地限制扬子克拉通北部的构造演化和主要的地球动力学背景。混杂岩中的角闪岩和蛇纹岩表现出轻度富集的轻稀土元素（LREEs）、大离子亲石元素（LILEs，例如 Rb、Ba）和负高场强元素（HFSEs，例如 Nb、Ta、Zr、 Hf 和 Ti) 异常，表明它们源自由板片衍生的流体/熔体交代的弧下地幔楔。镁铁质-超镁铁质成分可能代表了一个大约的肢解碎片。2.12 Ga 超俯冲带（SSZ）弧/前弧复合体。石榴石角闪石经历了中间大约在T/P变质作用。2.03 Ga，具有顺时针P-T路径。估计的（接近）峰值P–T∼10.1–10.6 kbar/660–670 °C 的条件对应于∼625–635 °C/GPa 的温压比，与俯冲碰撞相关的地温梯度一致。总的来说，混合岩在大约 10 小时记录了一次大洋内俯冲-吸积事件。2.12 Ga 和随后的碰撞在大约。2.03 Ga 结合区域地质资料，扬子克拉通北部NKC的增生-碰撞造山事件可能是对古元古代Nuna/Columbia超大陆全球尺度辐合和聚集的响应。扬子克拉通北部的古元古代（2.12-2.03 Ga）蛇绿混杂岩和造山作用支持了当时现代式板块构造体制的运行。