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3d Model Of A Sector Of The South Scotia Ridge (antarctica)

机译：南斯科舍省岭（南极洲）的一个部门的3d模型

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A three-dimensional geological model was built to show and analyse a northern sector of the Scotia-Antarctica transform plate boundary. The South Scotia Ridge is a 400 km long submerged continental structural high representing the eastern continuation of the Antarctic Peninsula.South Scotia Ridge runs approximately in the E-W direction,separating Scotia Sea Plate from Antarctica Plates.Structures,due to the transform plate margin,are considered to be concentrated inside this continental high.The three-dimensional model,built using seismic profiles and a digital elevation model,is a powerful tool to visualize and help to understand deep geological structures.Maps and profiles,on the contrary,only give a two-dimensional view,and do not show the structure of the continental-oceanic boundary at depth. The model shows that the deformation style of the continental-oceanic boundary,and of the oceanic crust nearby,is related to the left-lateral movement of the main transform fault system.Furthermore,it seems to be connected to the orientation and geometry of the South Scotia Ridge with respect to the homogeneous deformation regime,which affects the entire Scotia Plate.Moving from west to east,the NW-dipping main fault surface becomes almost vertical with a sinistral strike-slip movement in the central sector.To the east,a south-dipping plane decreases its inclination and changes orientation (from E-W to ESE-WNW): here shortening features are visible. The three-dimensional geological model presents a western and central province wherein the continental-oceanic boundary involves the fragmented continental blocks,the continental slope,the oceanic basement and sediments.The sedimentary cover and the oceanic basement are not deformed in the eastern province.
机译：建立了三维地质模型，以显示和分析Scotia-Antarctica转换板块边界的北部区域。斯科舍海脊南部是一个400公里长的被淹没的大陆性结构高点，代表了南极半岛的东部延续。斯科舍海脊大致沿EW方向延伸，使斯科舍海板块与南极板块分开。使用地震剖面和数字高程模型建立的三维模型是可视化和帮助理解深层地质结构的强大工具。相反，地图和剖面仅给出了一个二维视图，未在深度上显示大陆-海洋边界的结构。该模型表明，大陆-海洋边界以及附近洋壳的变形方式与主转换断层系统的左向运动有关。此外，它似乎与台风的方向和几何形状有关。南斯科舍脊相对于均匀变形机制而言，影响了整个斯科舍板块。从西向东移动，北西向倾斜的主断层表面几乎垂直，在中央部出现一条左走向走滑运动。向南倾斜的平面会减小其倾斜度并更改方向（从EW到ESE-WNW）：在这里可以看到缩短的特征。三维地质模型提出了一个西部和中部省份，其中大陆-海洋边界包括破碎的大陆块，大陆坡，海洋基底和沉积物。东部省的沉积物覆盖层和海洋基底没有变形。

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