...
  • 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 >Caldera-scale inflation of the Lazufre volcanic area, South America: Evidence from InSAR
【24h】

Caldera-scale inflation of the Lazufre volcanic area, South America: Evidence from InSAR

机译：南美洲拉祖弗雷火山地区的火山口规模通货膨胀：InSAR的证据

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

Collapsed calderas are the structural surface expression of the largest volcanic eruptions on Earth and may reach diameters of tens of kilometres while erupting volumes larger than 1000 km~3. Remnants of collapse calderas can be found along the South American volcanic arc and are thought to be inactive. However, this study shows that systems of such dimension may become active in a relatively short period of time without attracting much attention. Using satellite-based InSAR data, a 45 km wide elongated area of ground deformation was observed in the Lazufre volcanic region (Chile), where no deformation was detected 10 years ago. The deformation signal shows an uplift of up to ～3 cm yr~(-1) during 2003-2006, affecting an area of about 1100 km~2, comparable in size to super-volcanoes such as Yellowstone or Long Valley. This deformation signal can be explained by an inflating magma body at about 10 km depth, expanding and propagating laterally at a velocity of up to 4 km per year. Although it is not clear whether this intrusion will lead to an eruption, its dimensions and the rapid deformation rate insinuate that a potentially large volcanic system is forming.
机译：坍塌的火山口是地球上最大的火山喷发的结构表面表现形式，直径可达数十公里，而喷发量大于1000 km〜3。塌陷破火山口的残余物可以在南美火山弧上发现，并且被认为是不活跃的。但是，这项研究表明，这种规模的系统可能会在相对较短的时间内激活，而不会引起太多关注。使用基于卫星的InSAR数据，在Lazufre火山区（智利）观察到45 km宽的地面变形拉长区域，十年前未发现变形。变形信号显示2003-2006年期间隆升高达〜3 cm yr〜（-1），影响面积约1100 km〜2，其大小可与黄石或长谷等超级火山相媲美。这种变形信号可以用大约10 km深度的岩浆体膨胀，每年以4 km的速度横向扩展和传播来解释。尽管尚不清楚这种侵入是否会导致喷发，但它的大小和迅速的变形速率暗示着正在形成一个潜在的大火山系统。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
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