Sedimentary records of the North China Craton (NCC) between 1.8–0.8 Ga are indispensable for studying the evolution of the Earth’s surface ecosystem in the middle Proterozoic. Continuous late Paleoproterozoic successions (1.8–1.6 Ga) were found in the Xiong’er and Yanliao basins, which are located in the southern and northern margins of present NCC. The formation and evolution of these two basins were likely related to the breakup of Columbia supercontinent. With the deepening of research in recent years, the rifting and filling processes of these two basins are getting increasing attentions and controversies. Among them, a crucial controversy is the distribution of isochronous strata in these two basins, which is related to whether these two basins have ever been connected. In this study, we scrutinized the Paleoproterozoic successions in the Taihang Mountain area, which is located in the junction of the Xiong’er and Yanliao basins. The sedimentary distributions and overlaps indicated gradually transgression and northward extension of the Xiong’er Basin during 1.75–1.65 Ga, and demonstrated a temporary connection of the Xiong’er and Yanliao basins, at least during 1.67–1.64 Ga. We further estimated the maximum depositional ranges of the isochronous stratigraphic units and drew the evolutionary history of the Xiong’er and Yanliao basins in 1.8–1.6 Ga. These results will be helpful in further understanding the habitats of early life and predicting the distribution of mineral-containing sediments, such as iron ore and source rocks.

华北克拉通 (NCC) 1.8-0.8 Ga 的沉积记录对于研究中元古代地球表面生态系统的演化是必不可少的。在位于今华北克拉通南北缘的熊耳盆地和燕辽盆地中发现了连续的晚古元古代序列（1.8～1.6 Ga）。这两个盆地的形成和演化很可能与哥伦比亚超大陆的分裂有关。近年来，随着研究的深入，这两个盆地的裂谷充填过程越来越受到关注和争议。其中，一个至关重要的争议是这两个盆地的等时地层分布，这关系到这两个盆地是否曾经连通过。在这项研究中，研究了位于熊耳盆地与燕辽盆地交界处的太行山区古元古代序列。沉积分布和重叠表明熊耳盆地在 1.75~1.65 Ga 期间逐渐海进和向北延伸，并显示了熊耳盆地和燕辽盆地的暂时连接，至少在 1.67~1.64 Ga 期间。我们进一步估计了最大值等时地层单元的沉积范围，绘制了熊耳盆地和燕辽盆地在1.8～1.6 Ga的演化历史，这些结果将有助于进一步了解早期生命的栖息地和预测含矿物沉积物的分布，如如铁矿石和烃源岩。