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Structural Styles of the Scotian Slope: Discussion and Examples

机译：斯科蒂斜坡的结构样式：讨论与实例

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摘要

Structural style changes downdip from shelf to slope within the greater Scotian Basin. Regionally, on a very general basis, three separate structural regimes can be defined: shelf, shelf break and slope. Shelf structures are dominated by normal faulting, related both to growth-type structures and to reactivated basement faults. Structures associated with the shelf break are predominantly growth-type faults, with both down-to-the-basin and antithetical geometries and, frequently, deep-seated basement block faults. Slope structures, meanwhile, include growth faults seaward of the shelf break, and salt-related features in more downdip positions, with rift-related basement faulting present in some areas. Salt movement along the slope has continued from roughly the Middle Jurassic down to the present. In general, faulting along the lower shelf and upper slope is enhanced by the presence of a large-scale overpressure cell, which affects lower Missisagua and older strata.
机译：在大斯科特盆地内，构造样式从陆架向下倾斜变化。在非常普遍的基础上，可以在区域上定义三种不同的结构形式：架子，架子折断和斜坡。货架结构以正常断层为主，既与生长型结构又与重新活化的基底断层有关。与架子折断有关的结构主要是生长型断层，既有盆地基础又有相反的几何形状，而且常常是深层的基底块断层。同时，斜坡结构包括架子断裂向海的生长断层，以及在更多下倾位置的盐相关特征，在某些地区还存在与裂谷相关的地下断层。沿斜坡的盐分运动从大致中侏罗纪一直持续到现在。通常，由于存在一个大型超压单元，沿下部陆架和上部斜坡的断层作用会增强，这会影响米西萨瓜的下部和较老的地层。

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