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首页> 外文期刊>Global and planetary change >A possible link between faulting, cryptodomes and lateral collapses at Vesuvius Volcano (Italy)
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A possible link between faulting, cryptodomes and lateral collapses at Vesuvius Volcano (Italy)

机译：维苏威火山火山（意大利）的断层，隐穹顶和侧向坍塌之间可能存在联系

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Vesuvius is an active volcano that has been affected by late Quaternary lateral collapses and tectonic faults. Cryptodomes and two debris avalanche, 18 ka-old DA1 and 3.5 ka-old DA2, were previously documented off Vesuvius and for the younger avalanche a link between onshore and offshore stratigraphy was reconstructed. The interpretation of seismic reflection profiles off Vesuvius, borehole stratigraphies, onshore and geomorphological data allowed to recognise the relationships among debris avalanches, criptodomes and faulting. Stratigraphic data reveal a remarkable difference between the architecture of the northern and southern volcano sectors that is compatible with the occurrence of the DAI debris avalanche in the southern volcano sector. A contour map and a three-dimensional model of a surface merging the morphology of the top of the Somma lavas, in the northern volcano sector, with that of the top of the DAI debris avalanche, in the southern volcano sector, were reconstructed. We present a new lateral collapse model of Vesuvius Volcano and document the relevance of inherited tectonic faults in guiding collapse geometry. It is possible that the SW-directed collapse (DAI) was driven towards the hangingwall blocks of NW-SE normal faults, while the propagation of the W-directed collapse (DA2) can be ascribed to the activity of the E-W strike-slip fault Because of their distal location a minor role of cryptodome intrusion on collapses of Vesuvius can be postulated. The detailed analysis of substrate and edifice structure presented here establishes clear connexion between substrate tectonics and lateral collapse. This approach broadens the horizons of volcanic hazard assessment of Vesuvius.
机译：维苏威火山是一座活火山，受到第四纪晚期横向崩塌和构造断裂的影响。以前在维苏威火山附近记录了隐岩体和两个碎片雪崩，分别是18 ka老的DA1和3.5 ka老的DA2，对于年轻的雪崩，重建了陆上和海上地层之间的联系。对维苏威火山，井下地层，陆上和地貌数据的地震反射剖面的解释可以识别碎屑雪崩，cr足和断层之间的关系。地层数据显示，北部和南部火山区的构造之间存在显着差异，这与南部火山区DAI碎片雪崩的发生是相符的。重建了一个等高线图和一个三维模型，该模型融合了北部火山区的索马熔岩顶部和南部火山区的DAI碎片雪崩顶部的形态。我们提出了维苏威火山的一个新的横向塌陷模型，并记录了继承构造断裂在指导塌陷几何学中的相关性。西南向正常断层的上盘块可能驱动了西南向崩塌（DAI），而西南向走滑断层的活动可将西南向崩塌（DA2）的传播归因于此。由于它们的远端位置，可以假定在维苏威火山塌陷中，隐影钻头侵入的次要作用。这里对基底和建筑物结构的详细分析建立了基底构造与横向塌陷之间的明显联系。这种方法拓宽了维苏威火山的火山危害评估的视野。

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