Late Stenian–Tonian successions in the southeastern North China Craton (NCC) provide sedimentary records associated with the amalgamation and dispersal of the supercontinent Rodinia. Integrated field investigations, elemental geochemistry, and detrital zircon (DZ) U–Pb–Hf isotope analyses of the Huaihe and Langan groups in the northern Xuhuai Basin provide important constraints on their depositional ages and provenance changes. The mature to super-mature sediments of the lower–middle Huaihe, upper Huaihe, and Langan groups were deposited from 1121 to 943, 996–890, and 817–743 Ma, respectively. DZs from the Huaihe Group exhibit Neoarchean–Paleoproterozoic age groups at the base, with mainly positive and negative values for the 2.45–2.91 Ga and 1.81–2.44 Ga age intervals, respectively, shifting upward to multi-stage Mesoproterozoic populations with varying but mostly positive () values. The DZ age patterns of the Langan Group change from Neoarchean–Paleoproterozoic groups at the base, to the additional Mesoproterozoic and/or early Neoproterozoic groups, and finally to a unimodal early Neoproterozoic group. DZ signatures of the Huaihe and Langan groups reveal two episodic provenance transitions from NCC to North Qinling Terrane (NQT) sources. They were deposited in a passive rifting setting related to the Proterozoic NQT–NCC accretion process during Rodinia assembly. The marked shift in () values for the 1.80–1.40 Ga and 1.40–0.82 Ga DZs, increasing and decreasing with decreasing age, respectively, is attributed to the transition from an exterior orogen during Columbia breakup to an interior one during Rodinia assembly. Both transitions in the DZ age patterns and Hf isotopic signatures support the NCC–northwestern Laurentia connection in Rodinia.

中文翻译：

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徐淮盆地北部晚斯泰阶和晚托阶物源转换：对华北克拉通东南部前寒武纪演化的启示

华北克拉通（NCC）东南部的晚斯特尼阶-托尼阶序列提供了与罗迪尼亚超大陆的合并和分散相关的沉积记录。徐淮盆地北部淮河群和烂干群的综合野外调查、元素地球化学和碎屑锆石（DZ）U-Pb-Hf同位素分析为其沉积时代和物源变化提供了重要的约束。淮河中下群、淮河上流群和澜干群的成熟至过成熟沉积年龄分别为1121～943 Ma、996～890 Ma和817～743 Ma。淮河群的DZ在底部表现出新太古代-古元古代年龄组，在2.45-2.91 Ga和1.81-2.44 Ga年龄区间分别以正值和负值为主，向上移动到多阶段的中元古代种群，其变化但大多为正值() 值。Langan群的DZ年龄模式从底部的新太古代-古元古代群，到附加的中元古代和/或早新元古代群，最后到单峰早新元古代群。淮河群和兰干群的 DZ 特征揭示了从华北克拉通到北秦岭地体 (NQT) 来源的两个间歇性物源转变。它们沉积在与罗迪尼亚组装期间元古代 NQT-NCC 吸积过程相关的被动裂谷环境中。1.80-1.40 Ga 和 1.40-0.82 Ga DZ 的 () 值显着变化，分别随着年龄的减小而增大和减小，这归因于从哥伦比亚分裂期间的外部造山带到罗迪尼亚组装期间的内部造山带的转变。DZ 年龄模式和 Hf 同位素特征的转变都支持 NCC 与罗迪尼亚劳伦西亚西北部的联系。