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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Unusual sedimentary deposits on the SE side of Stromboli volcano, Italy: products of a tsunami caused by the ca. 5000 years BP Sciara del Fuoco collapse?
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Unusual sedimentary deposits on the SE side of Stromboli volcano, Italy: products of a tsunami caused by the ca. 5000 years BP Sciara del Fuoco collapse?

机译：意大利斯特龙博利火山东南部不寻常的沉积物：由ca.造成的海啸产物。 5000年的BP Sciara del Fuoco垮台了？

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The role of sector collapse in the generation of catastrophic volcanigenic tsunami has become well understood only recently, in part because of the problems in the preservation and recognition of tsunami deposits. Tinti et al. [Tinti, S., Bortolucci, E., Romagnoli, C., 2000. Computer simulations of tsunamis due to sector collapse at Stromboli, Italy. J. Volcanol. Geotherm. Res. 96, 103-128] modeled a tsunami produced by the c. 5,000 years BP collapse of the Sciara del Fuoco on the island volcano Stromboli. Although deposits associated with this event are generally lacking on the island/volcaniclastic breccias on the SE side of the island extending to an elevation above 120 m a.s.l. may have been generated by this tsunami. Deposits above 100 m are dominated by coarse breccias comprising disorganized, poorly sorted, nonbedded, angular to subangular lava blocks in a matrix of finer pyroclastic debris. These breccias are interpreted as a water-induced mass flow, possibly a noncohesive debris flow, generated as colluvial material on steep slopes was remobilized by the return flow of the tsunami wave, the run-up of which reached an elevation exceeding 120 m a.s.l. Finer breccias of subrounded to rounded lava blocks cropping out at 15 m a.s.l. are similar to modern high-energy beach deposits and are interpreted as beach material redeposited by the advancing tsunami wave. The location of these deposits matches the predicted location of the maximum tsunami wave amplitude as calculated by modeling studies of Tinti et al. [Tinti, S., Bortolucci, E., Romagnoli, C., 2000. Computer simulations of tsunamis due to sector collapse at Stromboli, Italy. J. Volcanol. Geotherm. Res. 96, 103-128]. Whereas the identification and modeling of paleo-tsunami events is typically based on the observation of the sedimentary deposits of the tsunami run-up, return flow may be equally or more important in controlling patterns of sedimentation.
机译：直到最近，人们才对部门崩溃在灾难性火山爆发海啸中的作用了解得很清楚，部分原因是海啸沉积物的保存和识别存在问题。 Tinti等。 [Tinti，S.，Bortolucci，E.，Romagnoli，C.，2000。由于扇形塌陷而在意大利的Stromboli进行的海啸计算机模拟。 J.火山地热。 Res。 [96，103-128]模拟了c。产生的海啸。英国石油公司（Sciara del Fuoco）在岛上的斯特龙博利火山爆发5,000年。尽管与该事件有关的沉积物通常在岛的SE侧的岛/火山碎屑角砾岩上缺乏，延伸到海拔120 m a.s.l以上。可能是这场海啸造成的。 100 m以上的沉积物以粗角砾岩为主，粗角砾岩由细碎屑碎屑基质中杂乱无章，分类不良，无层状，角至角下的熔岩块组成。这些角砾岩被解释为由水引起的质量流，可能是非粘性的泥石流，是由于海啸波的回流将陡坡上的砾石物质运走而产生的，海啸的回波流超过了120 ma.s.l。亚圆形至圆形熔岩块的细角砾岩在a.s.l. 15 m。与现代高能海滩沉积物相似，被解释为海啸的到来重新沉积了海滩物质。这些沉积物的位置与通过Tinti等人的模型研究计算得出的最大海啸波振幅的预测位置相匹配。 [Tinti，S.，Bortolucci，E.，Romagnoli，C.，2000。由于扇形塌陷而在意大利的Stromboli进行的海啸计算机模拟。 J.火山地热。 Res。 96，103-128]。尽管古海啸事件的识别和建模通常基于对海啸暴发沉积物的观察，但回流在控制沉积方式方面可能同等或更重要。

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