The morphology of insular shelves as a key for understanding the geological evolution of volcanic islands: Insights from Terceira Island (Azores)
The morphology of insular shelves as a key for understanding the geological evolution of volcanic islands: Insights from Terceira Island (Azores)
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岛架形态是了解火山岛地质演化的关键：特塞拉岛（亚速尔群岛）的见解
DOI：
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
F. Chiocci
中科院分区：
文献类型：
--
作者：
R. Quartau;A. Hipólito;C. Romagnoli;D. Casalbore;J. Madeira;F. Tempera;C. Roque;F. Chiocci
火山海洋岛屿的陆架是由两个主要过程相互竞争形成的，即形成并扩大陆架的海浪侵蚀和减小其规模的火山进积作用。在侵蚀作用强于火山作用的地方，陆架宽度可作为陆地火山体相对年龄的一个指标，并且可以重建它们在侵蚀之前的范围。在这项研究中，利用新的多波束测深和高分辨率地震反射剖面来描述特塞拉岛各个火山体附近的岛架形态，以增进对其演化的理解。陆地形态以及地质/地层数据也被用于建立陆上和海上演化之间的联系。与每个主要火山体相邻的陆架宽度与该岛已知的陆地地质历史相符；大多数较古老的火山体的陆架比年轻的火山体更宽。陆架边缘被证明是在平面图中揭示每个火山体原始范围的一个非常有用的指标。其深度也被用于重建垂直运动，表明像塞尔拉杜库梅 - 里贝里尼亚、吉列尔梅·莫尼兹和皮科阿尔托等较古老的火山体已经下沉，而较新的火山体则没有。陆架的形态（即是否存在新鲜的熔岩流形态以及几种侵蚀、沉积和构造特征）与海岸线形态分析相结合，使我们能够更好地限定之前对该岛演化的地质解释。
Shelves from volcanic ocean islands result from the competition between two main processes, wave erosion that forms and enlarges them and volcanic progradation that reduces their dimension. In places where erosion dominates over volcanism, shelf width can be used as a proxy for the relative age of the subaerial volcanic edifices and reconstruction of their extents prior to erosion can be achieved. In this study, new multibeam bathymetry and high‐resolution seismic reflection profiles are exploited to characterize the morphology of the insular shelves adjacent to each volcanic edifice of Terceira Island in order to improve the understanding of its evolution. Subaerial morphological and geological/stratigraphic data were also used to establish the connection between the onshore and offshore evolution. Shelf width contiguous to each main volcanic edifice is consistent with the known subaerial geological history of the island; most of the older edifices have wider shelves than younger ones. The shelf edge proved to be a very useful indicator in revealing the original extent of each volcanic edifice in plan view. Its depth was also used to reconstruct vertical movements, showing that older edifices like Serra do Cume‐Ribeirinha, Guilherme Moniz, and Pico Alto have subsided while more recent ones have not. The morphology of the shelf (namely the absence/presence of fresh lava flow morphologies and several types of erosional, depositional, and tectonic features) integrated with the analysis of the coastline morphology allowed us to better constrain previous geological interpretations of the island evolution.
西非佛得角群岛侧翼塌陷和大规模山体滑坡
影响因子：
3.7
作者：
Masson;T.P LeBas;I. Grevemeyer;W. Weinrebe
通讯作者：
W. Weinrebe
大洋岛架上的沉积过程——来自北大西洋中部风暴生成的新近纪沉积物的证据
影响因子：
3.5
作者：
MeirelesR;QuartauR;RamalhoR;RebeloA;MadeiraJ;ZanonV;ÁvilaS.
通讯作者：
ÁvilaS.