Caledonian shear zone deformation in Svalbard (Arctic) and its implications for the terrane transfer

斯瓦尔巴群岛（北极）加里东剪切带变形及其对地体转移的影响

• 批准号: 231870598
• 负责人: Professor Dr. Werner von Gosen
• 金额: --
• 依托单位: Forschungsschwerpunkt Krustendynamik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/231870598?language=en
• 关键词: Caledonian; shear; zone; deformation; Svalbard

The Caledonides of the Arctic in Svalbard are interpreted as a terrane collage in which different terranes were assembled along strike-slip faults. On the one hand, the terranes are related to original areas in the Caledonian orogen of east or north Greenland, on the other hand to the Pearya terrane in the Canadian Arctic. At the present, two known shear zones show sinistral displacements, however, in one area indications for dextral lateral slips were found. Also the present knowledge about the deformations between the shear zones in part is contradictory. Based on the results from two previous expeditions, structural analyses during the CASE 14-Expedition shall work out the Caledonian deformations and kinematic of shear zones in two selected areas of Svalbard. The results can contribute to a deeper understanding of the internal deformations of the Svalbard terranes, their relations to the strike-slip faulting, and the fault kinematics. Furthermore, they can also contribute to the knowledge of the overall mode of the Caledonian terrane transfer in the Arctic and the origin of the terranes.

位于斯瓦尔巴群岛的北极喀里多尼德群岛被解释为不同地体沿着走滑断层拼接而成的地体拼贴。地体一方面与格陵兰东部或北部加里东造山带的原生区有关，另一方面与加拿大北极的皮利亚地体有关。目前，两个已知的剪切带显示了左旋位移，但在一个地区发现了右旋侧滑的迹象。此外，目前关于剪切带之间变形的认识在一定程度上是相互矛盾的。根据前两次考察的结果，在案例14--考察期间进行的构造分析将计算出斯瓦尔巴特群岛两个选定地区的加里东变形和剪切带运动学。这些结果有助于更深入地了解斯瓦尔巴地体的内部变形及其与走滑断裂的关系，以及断层运动学。此外，它们还有助于了解北极加里东地体转移的总体模式和地体的起源。