四川盆地南缘早三叠世古地磁研究表明，川东和川东南地区一系列北北东、北东向褶皱的形成，并非同造山期形成的弧形弯曲构造，它是受深部断裂控制形成的简单褶皱。这一结果再次表明，华北与扬子地块的拼合晚于早三叠世，可能于早／中侏罗世完成拼合过程。 Paleo-Triassic paleomagnetic studies in the southern margin of the Sichuan Basin show that the formation of a series of north-eastern and northeastern fold folds in eastern Sichuan and southeastern Sichuan is not an arc-shaped bend formed during the orogenic orogeny and is controlled by deep fault control Simple folds. This result shows once again that the assemblage of the North China and Yangtze blocks is later than that of the Early Triassic and may be completed in the early / middle Jurassic.