羌塘地块是组成青藏高原的核心块体之一，被龙木错—双湖缝合带分隔成北羌塘地块和 南羌塘地块，古生代以来伴随着特提斯洋演化，从南半球冈瓦纳大陆裂解后不断向北漂移并逐步 拼贴至欧亚大陆南缘，这一运动过程塑造了青藏高原的基本构造格架。因此，恢复羌塘地块运动 学过程对于认识青藏高原形成演化和大陆单向裂解—聚合动力学过程等关键科学问题具有重要 意义。通过系统梳理南、北羌塘地块可靠的古地磁数据，建立了北羌塘地块二叠纪—三叠纪以 “世”为单位的视极移曲线和南羌塘地块古纬度变化曲线，基本刻画出二者二叠纪—三叠纪从南半 球向北半球漂移的运动学过程。北羌塘地块在晚石炭世—中二叠世稳定位于南半球中—低纬度 地区，而地质证据表明南羌塘地块在早二叠世位于南半球高纬度地区；南羌塘地块在早二叠世晚 期裂离冈瓦纳大陆后向北漂移，到中二叠世与北羌塘地块古纬度接近，随后二者共同以约16 cm/a 的速度北向漂移直至晚三叠世早期，随后北移速率放缓。基于古地磁数据的运动学重建和地质证 据，认为晚古生代古特提斯洋主域位于北羌塘—印支地块和塔里木—华北板块之间，新特提斯洋 在中二叠世之前打开、到约265 Ma 规模扩张至约2 000 km；中三叠世晚期—晚三叠世早期，古特提 斯洋规模缩减至1 000 km左右，最终在晚三叠世诺利期（约220 Ma）之前完全关闭。利用古地磁数 据精细刻画羌塘地块运动学过程可为古—新特提斯洋演化历史等关键科学问题提供约束。

Abstract：The Qiangtang block, separated into North Qiangtang Block (NQB) and South Qiangtang block (SQB) by Longmuco-Shuanghu suture zone, was originated from the northern margin of Gondwana and splitting from it in the Paleozoic subsequently drifting northward to collide with Laurasia in the Mesozoic. Its drift history is particularly important to understanding the evolution of the Qinghai-Tibet Plateau and Tethyan geodynamics. In this paper, we compiled reliable paleomagnetic data from SQB and NQB, establishing an epoch-level Apparent Polar Wander Path (APWP) for the NQB and a paleolatitude evolution curve for the SQB during the Late Carboniferous to Late Triassic. The NQB occupied lower-middle latitudes (~20°~30°S) in the Late Carboniferous to Middle Permian, while the SQB connected with Gondwana until the Early Permian. The SQB spalled from the northern margin of Gondwana and drifted may have begun in the late Early Permian. By the Middle Permian, its paleolatitude converged to a similar position as the NQB. Subsequently, they drifted coherently northward at an average rate of 16 cm/a until early Late Triassic. The drift rate slowed during the Late Triassic. Using palaeomagnetic result together with other paleomagnetic data and geologic observations, we argue that the main domain of the Paleo-Tethys Ocean was located between the NQB and the Tarim-North China Block (i. e., Jinshajiang Ocean) during the Late Paleozoic. The Neo-Tethys Ocean opened between the late Early Permian and the Middle Permian and had a width of ~2 000 km at ~265 Ma. In late Middle Triassic to early Late Triassic time, the Paleo-Tethys Ocean is limited expanse (~1 000 km) and finally completely closed at around ~230 Ma. More specifically, using paleomagnetic data to precisely characterize the kinematic evolution of the Qiangtang block can provide important constraints on key scientific issues such as the evolutionary history of the Paleo –Neo- Tethys Ocean.