Palaeomagmetism of Permian rocks from Sardinia - Testing Pangaea B

采用Wegener的经典泛大陆拟合（pangea a）时，二叠纪时期大陆分布的古地磁重建结果表明冈瓦纳与罗拉亚大陆之间有明显的重叠。这个问题可以通过将南部大陆向东移动约3000公里来解决，从而消除大陆重叠（泛大陆B）。然而，由于人们普遍认为大西洋的打开始于泛大陆a构造，冈瓦纳和劳亚之间需要一个主要的剪切带，冈瓦纳沿着这个剪切带在侏罗纪时代之前转移到泛大陆a。然而，这一解决方案受到了挑战，有人认为，泛大陆A重建中的大陆重叠反映了数据质量差、沉积物倾斜变浅或纬向八极磁场影响地球磁场的影响。这里提出的项目，解决了pangea B模型所要求的剪切带定位问题。古地磁研究旨在识别二叠纪大陆沉积物和撒丁岛火山的块体旋转，最终将有助于更好地理解二叠纪的地球动力学过程。

Palaeomagnetic reconstructions of the distribution of the continents during Permian times result in a significant overlap between Gondwana and Laurasia when Wegener's classical Pangaea fit (Pangaea A) is adopted. This problem can be overcome by shifting the southern continents some 3000 km towards the East, thus removing continental overlap (Pangaea B). However, since there is a general agreement that opening of the Atlantic started from a Pangaea A configuration, a major shear zone is required between Gondwana and Laurasia along which Gondwana was transferred into the Pangaea A fit prior to Jurassic times. This solution, however, has been challenged and it has been argued that the continental overlap in Pangaea A reconstructions reflects either poor data quality, inclination shallowing in sediments or the effects of zonal octupolar fields affecting the Earth Magnetic Field. The project proposed here, addresses the problem of locating the shear zone required by Pangaea B models. Palaeomagnetic studies designed to identify block rotations in Permian continental sediments and volcanics from Sardinia will ultimately lead to a better understanding of geodynamic processes during the Permian.