Terrestrial impact structures are typically modified by erosion, burial, and tectonic deformation. Their systematic morphologies are typically reconstructed through a combination of geological and topographic mapping, satellite imagery, and geophysical surveys. This study applies a novel geomatics approach to assessment of the morphology of the extensively studied Haughton impact structure (HIS), Devon Island, Nunavut, in order to test its potential to improve the accuracy and quality of future impact structure reconstruction. This new methodology integrates HIS lithological data, in the form of digitized geologic mapping, with a digital elevation model, within diametrically opposed, wedge-shaped couplets, and plots these data as pseudo cross sections that capitalize on the radial symmetry of the impact structure. The pseudo cross sections provide an accurate reconstruction of the nearsurface stratigraphic sequences and terraces in the faulted annulus of the modified crater rim. The resultant pseudo cross sections support current interpretations regarding the 10–12 km diameter of the transient cavity, and successfully reproduce the visible outer ring and intermediate uplifted zone within the central basin. Observed positions of vertical offsets suggest that the extent of impact deformation extends beyond the current estimates of the apparent crater rim to radial distances of between 14 and 15 km. Finally, the new geomatics approach provides an improved determination of the spatial, stratigraphic, and temporal relationships among the Haughton Formation lake sediments, allochthonous crater-fill impactites, and uplifted target rocks, and indicates that there was a not-insignificant time gap between the formation of the impact structure and the deposition of the sediments.

中文翻译：

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一种评估霍顿撞击结构的新地理学方法

陆地撞击结构通常会受到侵蚀、掩埋和构造变形的影响。它们的系统形态通常是通过结合地质和地形测绘、卫星图像和地球物理调查来重建的。本研究应用了一种新的地理信息学方法来评估努勒维特德文岛被广泛研究的 Haughton 撞击结构 (HIS) 的形态，以测试其在提高未来撞击结构重建的准确性和质量方面的潜力。这种新方法以数字化地质绘图的形式将 HIS 岩性数据与数字高程模型集成在完全相反的楔形对联中，并将这些数据绘制为伪横截面，利用撞击结构的径向对称性。伪横截面提供了修改后的火山口边缘断层环带中近地表地层序列和阶地的准确重建。由此产生的伪横截面支持目前关于瞬变腔直径 10-12 公里的解释，并成功地再现了中央盆地内可见的外环和中间隆起带。观察到的垂直偏移位置表明，撞击变形的程度超出了目前对明显陨石坑边缘的估计，径向距离在 14 到 15 公里之间。最后，新的地质学方法可以更好地确定 Haughton 组湖泊沉积物、外来陨石坑填充物撞击岩和隆起的目标岩石之间的空间、地层和时间关系，