Shore platform erosion and evolution: Implications for cosmogenic nuclide analysis
Shore platform erosion and evolution: Implications for cosmogenic nuclide analysis
复制标题
海岸平台侵蚀和演化：对宇宙成因核素分析的影响
DOI：
10.1016/j.margeo.2018.05.005
复制
发表时间：
2018
期刊：
影响因子：
2.9
通讯作者：
A. Trenhaile
中科院分区：
文献类型：
--
作者：
A. Trenhaile
确定海岸平台发展的速率和模式以及相关元素的年龄是当今岩石海岸研究者面临的最大挑战之一。这些海岸通常缺乏可测年代的沉积物，但宇宙成因核素分析（CNA）可以直接应用于裸露的岩石表面，以估计侵蚀速率或表面在千年时间尺度上暴露的时间。因此，这项技术有可能彻底改变目前的理论岩石海岸的演变和发展模式。然而，由于环境和地貌因素影响核素积累和保留的速率，CNA分析的结果取决于必须根据特定应用采用的理论模型的有效性。可以作出的重要假设包括与阴影、潮汐浸没、海滩沉积物覆盖和影响核素积累率的其他因素有关的假设，以及与海岸平台侵蚀的可能时空模式有关的假设，主要是波浪产生的后磨损和天气引起的下磨损，这些侵蚀会降低核素浓度。我们缺乏了解的因素，控制这些变量，特别是海岸平台侵蚀，这是本次审查的主题，有重要的影响建模岩石海岸的演变，评估可能的贡献继承，和约会，特别是CNA，发生的重要，形成事件。
Determining rates and modes of shore platform development and the age of associated elements are among the greatest challenges facing rock coast researchers today. These coasts generally lack dateable deposits but cosmogenic nuclide analysis (CNA) can be applied directly to bare rock surfaces to estimate erosion rates or the time that a surface has been exposed over millennial timescales. Therefore this technique has the potential to revolutionize current theories on rock coast evolution and modes of development. Because environmental and geomorphological factors affect rates of nuclide accumulation and retention, however, the results of CNA analysis are dependent on the validity of the theoretical models that have to be employed according to the particular application. Among the important assumptions that may be made are those concerned with shading, tidal immersion, beach sediment covers, and other factors that influence rates of nuclide accumulation, and with possible spatial and temporal patterns in shore platform erosion, primarily by wave-generated backwearing and weathering-induced downwearing, that reduce nuclide concentrations. Our lack of understanding of the factors that control these variables, and in particular shore platform erosion, which is the subject of this review, has important implications for modelling rock coast evolution, assessing the possible contribution of inheritance, and dating, especially by CNA, the occurrence of important, formative events.
河床粗糙度在倾斜岩岸平台波浪变换中的作用
DOI：
10.1002/2017jf004277
发表时间：
2018
期刊：
Earth Surface
影响因子：
--
作者：
Poate T
通讯作者：
Poate T
宏观潮汐岩石平台上波浪变换的观测
影响因子：
--
作者：
Poate T
通讯作者：
Poate T