Continental plateaus and tectonics-climate interactions (VAMP)

大陆高原和构造-气候相互作用 (VAMP)

• 批准号: 71329470
• 负责人: Professor Dr. Helmut Echtler
• 金额: --
• 依托单位: Helmholtz-Zentrum Potsdam - Deutsches GeoForschungsZentrum (GFZ)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/71329470?language=en
• 关键词: Continental; plateaus; tectonics; climate; interactions

With average elevations of several kilometers, low internal relief and high and deeply incised flanks, orogenic plateaus are first-order morphotectonic phenomena that form integral parts of the largest mountain ranges on Earth. Plateaus display unifying similarities such as anomalous lithospheric thicknesses, heat flow and complex interactions between tectonic and climatic processes. In fact, all Cenozoic plateaus profoundly impact climate and precipitation patterns commonly due to their spatial proximity to efficient orographic barriers. Higher precipitation and runoff, high-density stream networks, and high erosional capacity characterize the windward flanking slopes of these regions; conversely, arid conditions with internal drainage and low erosional capacity rivers define plateau interiors, thus creating strongly contrasting geologic and climatic conditions. Arguably, orogenic plateaus are thus among the best geological settings to investigate how surface and deep-seated process interact to shape the Earth’s surface.To further our understanding of interactions between surface and deep-seated processes in shaping the Earth’s topography we propose a CRP named Vertical Anatolian Movements Project (VAMP) to investigate the only orogenic plateau in Europe, the Miocene to Present Central Anatolia Plateau (CAP) . Our goal is to acquire a quantitative understanding of the competing tectonic, geomorphic and climatic processes controlling the development of orogenic plateaus. We aim at increasing the temporal and spatial resolution of plateau-building processes. As a corollary we will probe the effects of plateau uplift on climatic conditions that caused disparities in geomorphic process rates. We will strive to (1) determine the character of Miocene to Recent deformations, uplift and strain partitioning (2) inspect continental sedimentary archives and landforms with respect to long-term climate changes superposed on tectonic uplift; (3) decipher the spatiotemporal patterns of erosional exhumation along the plateau margins; and (4) evaluate the geophysical characteristics of the deep mantle/lithosphere beneath and around the plateau.

造山高原平均海拔数公里，内部起伏低，两侧高而深切，是一级形态构造现象，构成了地球上最大山脉的组成部分。高原在异常的岩石圈厚度、热流和构造与气候过程之间复杂的相互作用等方面表现出统一的相似性。事实上，所有新生代高原都深刻地影响着气候和降水模式，因为它们在空间上接近有效的地形屏障。高降水、径流、高密度水系和高侵蚀能力是这些地区迎风侧坡的特征；相反，干旱条件与内部排水和低侵蚀能力的河流定义高原内部，从而形成强烈对比的地质和气候条件。可以说，造山高原是研究地表和深层过程如何相互作用以塑造地球表面的最佳地质环境之一。为了进一步了解地表和深层过程之间的相互作用，我们提出了一个名为“垂直安纳托利亚运动项目”（VAMP）的CRP，以研究欧洲唯一的造山高原，中新世到现在的安纳托利亚中部高原（CAP）。我们的目标是定量了解控制造山高原发育的相互竞争的构造、地貌和气候过程。我们的目标是提高高原建设过程的时间和空间分辨率。作为推论，我们将探讨高原隆起对气候条件的影响，导致地貌过程速率的差异。我们将努力(1)确定中新世到近代的变形、隆升和应变分区的特征；(2)在构造隆升叠加的长期气候变化中考察大陆沉积档案和地貌；(3)解析高原边缘侵蚀发掘的时空格局；(4)评价高原下方及周围深部地幔/岩石圈的地球物理特征。