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Evolution of Earth's large-scale topography in the Cenozoic

新生代地球大尺度地形演化

基本信息

批准号：
NE/J024813/1
负责人：
Carolina Lithgow-Bertelloni
金额：
$ 1.81万
依托单位：
University College London
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2012
资助国家：
英国
起止时间：
2012 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FJ024813%2F1
关键词：
Evolution Earth large scale topography

项目摘要

The scoping study will bring together experts in geophysical observations of topography, geological proxiesof subsidence, uplift and paleoaltimetry, lithospheric mechanics, computational fluid dynamics, seismologyand mineral physics, to produce an action plan for a directed expenditure that will allow us to determineEarth's topography and bathymetry for the last 60 My - and set the boundary conditions for understandingthe long-term carbon cycle, changes in sea-level and large past climatic extremes.A strategic program is necessary in order to weave these threads together in the form of a comprehensivemodel of long-wavelength topography and its driving forces over the Cenozoic. Ties between communitiesthat do not normally interact strongly must be forged: between those with expertise in the shallowest crustand the deepest mantle, and between those with expertise in observational data and dynamical modeling. Inorder to make progress sustained effort must be devoted to bringing together observational constraints onpaleotopography from the geologic record and models of whole mantle structure and circulation. Among thefundamental challenges to be overcome are the large range of length scales involved, from that of sedimentarybasins to that of tectonic plates, and the large range of time scales, from that of river incision to platerearrangements.

这项范围研究将汇集地形地球物理观测、沉降、隆起和古高度测量的地质指标、岩石圈力学、计算流体动力学、地震学和矿物物理学方面的专家，以制定一项定向支出行动计划，使我们能够确定过去60年地球的地形和水深，并为理解长期碳循环设定边界条件，海平面的变化和过去的大气候极端。一个战略计划是必要的，以编织这些线程在一起的形式，一个全面的模型的长波地形及其驱动力在新生代。必须在通常相互作用不强烈的社区之间建立联系：在最浅地壳和最深地幔方面具有专业知识的社区之间，以及在观测数据和动力学建模方面具有专业知识的社区之间。为了取得进展，必须持续努力，把地质记录和整个地幔结构和环流模型中对古地形的观测约束结合起来。需要克服的基本挑战之一是所涉及的长度尺度范围很大，从沉积盆地到构造板块，以及时间尺度范围很大，从河流切割到板块重组。