Neoproterozoic to Paleozoic sedimentation shows systematic temporal-spatial variations within South China, which must be considered in reconstructing geological evolution of South China in response to global plate reorganization from the breakup of Rodinia to the assembly of Gondwana. We use >1000 new U-Pb and Hf isotopic data for detrital zircons from Neoproterozoic–Cambrian strata across the western (i.e., Longmenshan) and eastern (i.e., Wuyishan) margins of South China, coupled with compiled stratigraphic and magmatic information, to constrain change in provenance through time. First-order conclusions are as follows: (1) detrital zircons from the Neoproterozoic strata of the two margins were mainly sourced from the Panxi-Hannan arc and the Jiangnan orogen, signaling a rough self-sufficient sedimentary system; (2) newly identified Cambrian molasse-like sediments in the western margin, in which abundant detrital zircons are 550–500 Ma old with positive εHf(t) values, were mainly derived from the 580–500 Ma Cadomian arc belt along the Iran-Turkey margin; and (3) the Cambrian sediments in the eastern margin document more increased contributions from the Grenvillian-age provinces most possibly in Australia. Such spatial-temporal provenance variations signal the northward drifting of South China, from a position connecting with Iran-Turkey and northern India to that approaching Australia during the late Neoproterozoic–Cambrian period. We highlight that the activity of oblique oceanic-continental convergence accreted Asian terranes onto the northern margin of Gondwana, hence contributing to the ultimate Gondwana architecture under global plate reorganization.

中文翻译：

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冈瓦纳大陆集结期间华南持续北漂：新元古代-寒武系地层时空物源比较的制约

新元古代至古生代沉积在华南地区表现出系统的时空变化，在重建华南地质演化以响应从罗迪尼亚分裂到冈瓦纳大陆组装的全球板块重组时必须考虑这一点。我们使用了超过 1000 种新元古代-寒武系碎屑锆石的 U-Pb 和 Hf 同位素数据，这些锆石来自华南西部（即龙门山）和东部（即武夷山）边缘，并结合汇编的地层和岩浆信息，以限制出处随时间变化。一阶结论如下： (1) 两缘新元古代地层碎屑锆石主要来源于攀西—汉南弧和江南造山带，表明沉积体系粗略自给；(2) 西缘新发现的类寒武系磨拉石沉积物，其中丰富的碎屑锆石年龄为550-500 Ma，εHf(t)值为正，主要来源于伊朗沿线的580-500 Ma Cadomian弧带-土耳其保证金；(3) 东部边缘的寒武纪沉积物记录了更多来自澳大利亚最有可能的格伦维尔时代省份的贡献。这种时空物源变化标志着华南向北漂移，从连接伊朗-土耳其和印度北部的位置到新元古代晚期-寒武纪晚期靠近澳大利亚的位置。我们强调，倾斜的海洋 - 大陆辐合活动将亚洲地体增生到冈瓦纳大陆的北缘，从而有助于全球板块重组下最终的冈瓦纳大陆建筑。