Utrecht University, Utrecht, Netherlands.
National Science Foundation, Arlington, VA, USA. Sorbonne, Pierre & Marie Curie University, and CNRS, UMR 7193, ISTeP, F-75005 Paris, France.
Science. 2015 Jan 23;347(6220):1258375. doi: 10.1126/science.1258375.
Enabled by recently gained understanding of deep-seated and surficial Earth processes, a convergence of views between geophysics and sedimentary geology has been quietly taking place over the past several decades. Surface topography resulting from lithospheric memory, retained at various temporal and spatial scales, has become the connective link between these two methodologically diverse geoscience disciplines. Ideas leading to the hypothesis of plate tectonics originated largely with an oceanic focus, where dynamic and mostly horizontal movements of the crust could be envisioned. But when these notions were applied to the landscapes of the supposedly rigid plate interiors, there was less success in explaining the observed anomalies in terrestrial topography. Solid-Earth geophysics has now reached a developmental stage where vertical movements can be measured and modeled at meaningful scales and the deep-seated structures can be imaged with increasing resolution. Concurrently, there have been advances in quantifying mechanical properties of the lithosphere (the solid outer skin of Earth, usually defined to include both the crust and the solid but elastic upper mantle above the asthenosphere). The lithosphere acts as the intermediary that transfers the effects of mantle dynamics to the surface. These developments have allowed us to better understand the previously puzzling topographic features of plate interiors and continental margins. On the sedimentary geology side, new quantitative modeling techniques and holistic approaches to integrating source-to-sink sedimentary systems have led to clearer understanding of basin evolution and sediment budgets that allow the reconstruction of missing sedimentary records and past geological landscapes.
在对深层次和表层地球过程的理解不断加深的推动下,过去几十年来,地球物理学和沉积地质学之间的观点趋同悄然发生。岩石圈记忆所产生的地表形貌在不同的时间和空间尺度上得以保留,成为这两个方法学迥异的地球科学学科之间的连接纽带。板块构造假说的思想主要源于海洋学,在那里可以想象地壳的动态和大部分水平运动。但是,当这些概念被应用于所谓刚性板块内部的景观时,在解释陆地地形的观测异常方面就不太成功。固体地球物理学现在已经发展到了一个可以在有意义的尺度上测量和模拟垂直运动,并以越来越高的分辨率对深部结构进行成像的阶段。与此同时,在量化岩石圈(地球的固体外壳,通常定义为包括地壳和软流圈之上的固体但有弹性的上地幔)的力学性质方面也取得了进展。岩石圈作为将地幔动力学的影响传递到地表的中间层。这些发展使我们能够更好地理解板块内部和大陆边缘以前令人困惑的地形特征。在沉积地质学方面,新的定量建模技术和整体方法来整合源到汇的沉积系统,导致对盆地演化和沉积收支的理解更加清晰,这使得对缺失的沉积记录和过去的地质景观进行重建成为可能。