Topographic expressions of mantle dynamics in the Mediterranean
Topographic expressions of mantle dynamics in the Mediterranean
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DOI：
10.1016/j.earscirev.2020.103327
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发表时间：
2020-10-01
影响因子：
12.1
通讯作者：
Becker, Thorsten W.
中科院分区：
文献类型：
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作者：
Faccenna, Claudio;Becker, Thorsten W.
地球表面是发生在其表面深处或表面以上的动态过程的不断变化的表现。然而，我们根据潜在的构造或气候强迫来“解读”景观的能力仍然很初级。在过去的十年中，人们特别关注对地形的深层动态贡献，与地幔对流在岩石圈底部产生的应力相关，以及它们与地形的（等）静态分量相比的相关性。在这里，我们使用地中海的例子并估计残余和动态地形。然后，我们将这些数据与特定区域的地质地表隆起进行比较，以区分动态和静态部分。考虑构造过程的不同地形特征（例如实际地形、残余地形和动态地形以及抬升率），共同提供了区分地幔、地壳和表面过程的贡献的有力方法。这种方法可能会让我们更接近于根据地质原因来解读地形表达。
The surface of the Earth is the ever-changing expression of the dynamic processes occurring at depth and at or above its surface. However, our ability to "read" landscapes in terms of their underlying tectonic or climatic forcing remains rudimentary. During the last decade, particular attention has been drawn to the deep dynamic contributions to topography, related to the stresses that are produced at the base of the lithosphere by mantle convection, and their relevance compared to the (iso)static component of topography. Here, we use examples from the Mediterranean and estimate residual and dynamic topography. We then compare those with surface uplift from geology for specific regions to disentangle the dynamic from the static components. Considering the different topographic signatures of tectonic processes (e.g. actual, residual, and dynamic topography as well as uplift rates) jointly provides a powerful way to distinguish between the contributions of mantle, crustal, and surface processes. Such an approach might bring us closer to reading topographic expressions in terms of their geological cause.