Origin and Deformation of the Forlandsundet Basin, Spitsergen: Tertiary Plate-Margin Dynamics in the Arctic Region

本研究将评估变形的历史， 斯匹次卑尔根群岛西部的第三纪Forlandsundet盆地， 将变形序列与盆地演化联系起来， 板块动力学沿着第三纪转换板块边缘， 它进化到了斯瓦尔巴特群岛 和格陵兰岛。 在盆地的初步实地调查表明 走滑-逆冲多期变形 件. 此外，砂岩和砾岩样本 表现出韧性变形和再结晶的迹象 云母颗粒和渗透叶理的发展。 早期的实地工作也强调需要解决 变形事件的时间。 调查人员将 利用宏观构造制图、古应力分析、 显微构造研究和40 Ar/39 Ar测年 盆地构造演化假说。 一 多期变形历史是确定的， 这项研究的目的是要破译盆地的运动历史， 并将其与第三纪的进化联系起来 边缘和挪威-格陵兰海的开放。

This study will evaluate the deformational history of the Tertiary Forlandsundet basin of western Spitsbergen and will relate the deformational sequence to basin evolution and plate dynamics along the Tertiary transform plate margin as it evolved to the modern spreading margin between Svalbard and Greenland. Preliminary field work in the basin suggests multiphase deformation including strike-slip and thrust components. In addition, sandstone and conglomerate samples display signs of ductile deformation with recrystallization of mica grains and development of penetrative foliation. Earlier field work also emphasizes the need to resolve the timing of the deformational episodes. Investigators will use macrostructural mapping, paleostress analysis, microstructural study, and 40Ar/39Ar dating to test working hypotheses for the tectonic evolution of the basin. A multiphase deformational history is certain, and the goal of this study is to decipher the kinematic history of the basin and relate that history to the evolution of the Tertiary margin and the opening of the Norwegian-Greenland Sea.