This work analyses six high-resolution multi-channel seismic profiles across the Klints Bank east of Gotland. The Klints Bank consists of a drop-shaped increase of the Quaternary thickness and is oriented in an approximately north-southern direction with a length of over 50 km, a width of about 15 km and a maximum thickness of 150 m. The glacial origin of the Klints Bank can be verified with the dataset presented in this study. We classify the feature as a (giant) drumlin due to its steep up-ice and tapered down-ice face in combination with an orientation parallel to the ice-flow direction of the Weichselian glaciation. The seismic image of the internal structure of the Quaternary unit shows no uniform stratification or deformation patterns; instead, local sub-parallel reflection patterns interlayered with transparent units are observed. The averaged seismic velocity of this unit is about 2000 m/s, which is interpreted as an autochthonous deposition of glaciogenic sediments. Signs of overprinting are interpreted based on the geometry of the flanks of the structure, which appear mostly in the form of collapse structures and lifted blocks due to compressional thrust faulting. Phase-reversed events within and beneath the Quaternary are perceived as strong evidence of fluid (hydrocarbon) presence within the Klints Bank. Organically enriched Palaeozoic shales in south-easterly direction of the Klints Bank presumably give the origin of these thermogenic hydrocarbons.

中文翻译：

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哥特兰岛（波罗的海）以东的克林茨岸地震地层：一个巨大的鼓槌密封热成因碳氢化合物

这项工作分析了哥特兰岛以东克林茨银行的六个高分辨率多道地震剖面。Klints Bank 由第四纪厚度呈水滴状增加组成，大致呈南北走向，长度超过50 km，宽度约为15 km，最大厚度为150 m。克林茨银行的冰川起源可以通过本研究中提供的数据集进行验证。由于其陡峭的上冰面和锥形下冰面以及平行于 Weichselian 冰川的冰流方向的方向，我们将该特征归类为（巨型）鼓槌。第四纪单元内部构造的地震图像没有显示出均匀的分层或变形模式；相反，观察到与透明单元夹层的局部次平行反射图案。该单元的平均地震速度约为2000 m/s，解释为冰川沉积物的本土沉积。叠印的迹象是根据结构侧翼的几何形状来解释的，由于压缩逆冲断层，这些结构主要以坍塌结构和抬升块的形式出现。第四纪内部和之下的相反转事件被认为是克林茨银行内存在流体（碳氢化合物）的有力证据。克林茨银行东南方向的有机富集古生代页岩可能是这些热成因烃的来源。由于挤压逆冲断层，它们主要以坍塌结构和抬升块体的形式出现。第四纪内部和之下的相反转事件被认为是克林茨银行内存在流体（碳氢化合物）的有力证据。克林茨银行东南方向的有机富集古生代页岩可能是这些热成因烃的来源。由于挤压逆冲断层，它们主要以坍塌结构和抬升块体的形式出现。第四纪内部和之下的相反转事件被认为是克林茨银行内存在流体（碳氢化合物）的有力证据。克林茨银行东南方向的有机富集古生代页岩可能是这些热成因碳氢化合物的来源。