...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Volcanology and Geothermal Research >Constraining age and volume of lava flow invasions of the Alcantara valley, Etna volcano (Italy). New insights from paleomagnetic dating and 3D magnetic modeling
【24h】

Constraining age and volume of lava flow invasions of the Alcantara valley, Etna volcano (Italy). New insights from paleomagnetic dating and 3D magnetic modeling

机译：Alcantara谷的熔岩流入境的约束年龄和体积，etna火山（意大利）。古磁性约会和3D磁模拟的新见解

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Alcantara River marks the northern border of Etna volcano, and along its NE sector, it forms a narrow NW-SE elongated valley that is carved in the Mts. Peloritani sedimentary sequences. The valley has been invaded by several lava flows during the growth of the main bulk of the stratovolcano edifice in the past 60 ky (Ellittico and Mongibello volcanoes). In this paper, we have constrained the age of the main lava flows forming the valley floor and reconstructed the length and volume of the main lava flow that impacted this area through a multidisciplinary approach integrating stratigraphic and aeromagnetic data analysis together with new paleomagnetic and C-14 dating. The new age determinations showed that the evolution of the present-day geological and hydro graphic setting of the valley was mainly conditioned by a few flank eruptions that occurred in the lower N flank of Etna during the activity of the Mongibello volcano. In particular, between 13.9 and 9.7 ka BP the valley floor was filled by the so-called Alcantara lava flow for its entire length up to the river mouth, reaching a maximum length of about 24 km. Later, two other flank eruptions - producing the so-called Mt. Dolce and Solicchiata lava flows - occurred at 9.1-7.2 and 7.3-7.2 ka BP (respectively), covering the eruptive fissure and the proximal portion of the Alcantara lava field and generated the most recent northward shift of the riverbed. Finally, 3D magnetic modeling allowed us to calculate the total on- and off-shore volume of the Alcantara lava flow as 1 km(3), a value comparable to those of the long-lasting historical eruptions of Etna. Conversely, the 24 km length reached by this lava flow is anomalously high when compared to lava flows of the past 15 ky, likely because its emplacement occurred within the valley floor, preventing any possibility of lateral expansion. (C) 2019 Elsevier B.V. All rights reserved.
机译：Alcantara River标志着Etna火山的北部边界，沿着其网站，它形成了一个狭窄的NW-SE细长山谷，雕刻在MTS中。 Peloritani沉积序列。在过去的60 KY（Ellittico和Mongibello Volcanoes）的主要大部分的斯特罗维罗卡诺大厦的主要大部分阵容期间，山谷已经被几个熔岩流入侵。在本文中，我们限制了形成山谷地板的主要熔岩流量的年龄，并重建了通过多学科方法将地层和航空数据分析与新的古物币和C-相结合影响该地区的主要熔岩流量的长度和体积。 14约会。新时代的测定表明，谷的现状地质和水力图形设置的演变主要是通过在蒙根火山的活性期间在EtNA的下部N侧面发生的几个侧翼喷发。特别是，在13.9和9.7 ka bp之间，山谷地板被所谓的alcantara熔岩填充到河口的整个长度，最大长度约24公里。后来，另外两只侧翼喷发 - 产生所谓的Mt. Dolce和Solicchiata Lava流动 - 发生在9.1-7.2和7.3-7.2 ka bp（分别），覆盖喷发裂缝和阿尔卡塔拉熔岩田的近端部分，并产生了河床最近的北方偏移。最后，3D磁性建模允许我们计算Alcantara Lava流量的总量和离岸体积为1 km（3），这是与Etna的长期历史爆发的价值相当。相反，与过去15 KY的熔岩流相比，这种熔岩流达到的24公里长度非常高，可能是因为它的施加在山谷地板内发生，防止了横向膨胀的任何可能性。 （c）2019 Elsevier B.v.保留所有权利。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号