Currently, knowledge of structure and tectonic evolution of the Arctic lithosphere remains limited. The effective elastic thickness of the lithosphere (T_e) is a parameter that describes the lithospheric integrated strength and reflects its thermal and rheological properties, which helps to reveal intraplate tectonic process. In this study, we present a high-resolution T_e model in the Arctic region (north of 67°N), which is highly heterogeneous and strongly correlated with various regional tectonic elements. To verify the recovered T_e, its pattern is compared to those obtained in previous studies that used different methods and to available heat flow measurements and seismic velocity model and shows good agreement. High T_e values are found in the Greenland shield, North American craton and Siberian craton, which are compatible with results from previous studies of high seismic velocity and low heat flow, suggesting that cold, thick lithosphere remains tectonically undisturbed. Low T_e values occur in the Amerasia Basin, Baffin Bay, Eurasia Basin and North Atlantic Ocean where young oceanic lithosphere is created. Moreover, the areas affected by regional volcanism in the Siberian Traps and HALIP are dominated by reductions in T_e, which we attribute to thermal rejuvenation triggered by the intrusion of magma. Weak lithosphere also dominates in tectonically active orogens as well, including the Alaska-Chukotka, Novaya Zemlya and Caledonides, and is related to the stress released during collisional deformation. We find that a few deep sedimentary basins are characterized by intermediate T_e, which implies mechanical support of the surface sediment loads in a non-isostatic state. Our new T_e model provides potentially significant insights into various tectonic and geodynamic problems of the Arctic lithosphere.

目前，对北极岩石圈结构和构造演化的了解仍然有限。岩石圈有效弹性厚度（T _e）是描述岩石圈综合强度和反映其热学和流变学性质的参数，有助于揭示板内构造过程。在这项研究中，我们提出了北极地区（北纬 67°以北）的高分辨率T _e模型，该模型具有高度异质性，并且与各种区域构造要素密切相关。为了验证恢复的T _e，将其模式与使用不同方法的先前研究中获得的模式以及可用的热流测量和地震速度模型进行比较，并显示出良好的一致性。高的在格陵兰地盾、北美克拉通和西伯利亚克拉通中发现了T _e值，这与先前高地震速度和低热流的研究结果一致，表明寒冷、厚实的岩石圈在构造上保持未受干扰。低T _e值出现在 Amerasia Basin、Baffin Bay、Eurasia Basin 和北大西洋，在那里形成了年轻的海洋岩石圈。此外，受西伯利亚圈闭和 HALIP 区域火山作用影响的地区主要是T _e减少，我们将其归因于岩浆侵入引发的热再生。弱岩石圈也在构造活跃的造山带中占主导地位，包括阿拉斯加-楚科奇、新地岛和加里多尼德，这与碰撞变形过程中释放的应力有关。我们发现一些深层沉积盆地的特征是中间T _e，这意味着表层沉积物负载在非等静压状态下的机械支撑。我们的新T _e模型为北极岩石圈的各种构造和地球动力学问题提供了潜在的重要见解。