羌北地块是青藏高原面积较大，具有古老基底且古生代以来沉积盖层发育较完整的稳定块体之一。定量描绘出其古生代以来的古地理位置和运动学过程，可为研究青藏高原古构造格局、显生宙特提斯演化和古地理重建等提供重要基础和关键制约。本项目拟主要利用构造磁学研究方法，结合岩矿分析、磁化率各向异性（AMS）测试、各种岩石磁学测试、E-I检验及各种可行的地质检验等技术方法，在羌北地块西部和中部化石丰富、时代依据充分、接触关系清楚、没有变形和变质的志留和泥盆系沉积地层中，分别选择两条连续完整的剖面开展系统古地磁研究，获得羌北地块志留和泥盆纪可靠古地磁数据。再结合前人研究结果，获得羌北地块志留纪以来的古地磁视极移曲线，重建青藏高原腹地关键地块在地质历史中的古地理位置和运动学特征，为再造冈瓦那大陆北缘块体裂离和欧亚大陆南缘块体拼贴的地质历史过程，为研究青藏高原特提斯演化和冈瓦纳与欧亚大陆界线位置等提供关键古地磁制约。

The northern Qiangtang Block of the Tibetan plateau is a large and stable block with a Precambrian crystalline basement and intact Phanerozoic sedimentary cover. Quantitative descriptions of the Paleozoic paleogeography and kinematic evolution of this block will provide key constraints in the overarching endeavor to better understand the history and tectonic architecture of the Tibetan plateau (for example by establishing the early paleogeographic framework and by constraining the initiation, growth and destruction of the Tethys). This project therefore aims to obtain precise and quantitative Silurian and Devonian paleomagnetic data from the northern QiangtangBlock. Our work will combine a variety of research methods, including classic applied paleomagnetism paired with rock and mineral analysis, but also more exotic techniques, such as AMS (anisotropy of magnetic susceptibility) and E-I (Elongation-Inclination) analysis, to ensure that we deliver reliable data of the highest-quality. Sampling will be coordinated at two sections in Silurian and Devonian strata in the eastern and middle regions of the northern Qiangtang Block, which have been selected due to their abundant fossils (thereby providing good age control), clear formational contacts, and the absence of deformation and metamorphism (thereby increasing the chances that a primary magnetization has been preserved). Our results, combined with previously published paleomagnetic data, will allow the construction of an apparent polar wander path (APWP) for the northern Qiangtang Block, with which we can reconstruct the paleogeography and kinematic history of this critical region of the Tibetan plateau. More specifically, this work will provide key paleomagnetic constraints on the rift-to-drift timing for the blocks that split from northern Gondwana in the mid-to-late Paleozoic, creating the Neotethyan Ocean and ultimately setting in motion the events that gave rise to the formation of the Tibetan plateau. Our results will therefore also further contribute to ongoing discussions about the nature of the Tethys and the location of key boundaries between Gondwana and Eurasia.