In the Early Jurassic, a large-scale transgression occurred on the South China continental margin (SCCM), affected by the initiation of Paleo-Pacific subduction. This transgression significantly influenced the source areas and transport mode of Lower Jurassic sediments in the SCCM. This study discussed the differences in the major source areas among the western, central, and eastern SCCM and constructed a brief Lower Jurassic sediments transport process in the SCCM. To avoid the bias of detrital-zircon ages caused by variations in zircon fertility, we gathered 1802 whole-rock zirconium content values (ppm) from representative granites with different ages in the South China Craton. Based on mean Zr contents and statistical analyses, we divided these granitic rocks into three groups: Group A consists of Jurassic (200–145 Ma) and Neoproterozoic (900–700 Ma), Group B consists of Paleozoic (490–390 Ma) and Permian–Triassic (280–210 Ma), and Group C comprised Paleoproterozoic (2000–1700 Ma) and Neoarchean (2900–2500 Ma). This research assigned these groups zircon fertility factors (ZFF) of 1.0, 1.4, and 2.5, respectively. Subsequently, by studying corrected detrital zircon ages from Lower Jurassic sediments by ZFF, we found that the Yunkai Terrane and Hainan Island were primary source areas for the western SCCM. The Wuyi Terrane and Nanling Tectonic Belt provided abundant detrital materials for the eastern SCCM. It should be noted that the central SCCM was a vast shallow sea in the Early Jurassic due to the large-scale transgression. Thus, the coastal currents and drowned pre-Jurassic river valleys controlled sediment delivery to the central SCCM. Overall, the Lower Jurassic sediments distribution system in the SCCM was significantly affected by Paleo-Pacific subduction.

在侏罗纪早期，受古太平洋俯冲作用的影响，华南大陆边缘发生了大规模的海侵。这次侵袭极大地影响了南海中下游侏罗纪沉积物的来源区和运移方式。这项研究讨论了南，西，中，东SCCM主要来源地区的差异，并在SCCM中构造了一个简短的下侏罗统沉积物运移过程。为避免锆石肥力变化引起的碎屑锆石年龄偏差，我们从华南克拉通不同年龄的代表性花岗岩中收集了1802个全岩石锆含量值（ppm）。根据平均Zr含量和统计分析，我们将这些花岗岩分为三类：A组由侏罗纪（200-145 Ma）和新元古代（900-700 Ma）组成，B组由古生界（490-390 Ma）和二叠纪-三叠纪（280-210 Ma）组成，C组由古元古代（2000- 1700 Ma）和新archean（2900–2500 Ma）。这项研究将这些组的锆石生育因子（ZFF）分别指定为1.0、1.4和2.5。随后，通过ZFF研究校正的下侏罗统沉积物的碎屑锆石年龄，我们发现Yunkai Terrane和海南岛是SCCM西部的主要来源地区。武夷地貌和南岭构造带为东部南海盆地提供了丰富的碎屑物质。应当指出的是，由于大规模海侵，中央侏罗系中部是侏罗纪早期的广阔浅海。因此，沿海水流和淹没的侏罗纪前河谷控制着沉积物向中央SCCM的输送。总体而言，SCCM的下侏罗统沉积物分布系统受到古太平洋俯冲作用的显着影响。