首页> 外文期刊>Journal of Volcanology and Geothermal Research >Constraining the degassing processes of Popocatepetl Volcano, Mexico: A vesicle size distribution and glass geochemistry study
【24h】

Constraining the degassing processes of Popocatepetl Volcano, Mexico: A vesicle size distribution and glass geochemistry study

机译:限制墨西哥Popocatepetl火山的脱气过程:囊泡大小分布和玻璃地球化学研究

获取原文
获取原文并翻译 | 示例
           

摘要

The explosive activity of Popocatepetl Volcano is a threat to the surrounding densely populated areas and it is therefore important to recognize indicators of change in eruptive style (explosive to dome building) within a short period of time. In this study we present results of vesicle size distributions (VSDs) and compositional analysis of matrix glass from juvenile clasts from five of the main plinian eruptions of Popocatepetl (ca. 23-1.2 ka), the 2001 small eruption during partial dome collapse and four eruptions during 1997 (May 11th and June 14th, 15th and 30th). Major element analysis of matrix glass (WDS-EPMA) allows the estimation of the depth from which the erupted magma went into disequilibrium (between crystals and melt), by calculating the equilibrium pressure using the quartz-albite-orthoclase ternary system of Blundy and Cashman (2001). Quantitative interpretation of texture in juvenile (pumice or scoria) clasts via VSD analysis using CSD software was used to link physical changes experienced by magma during ascent, with conditions responsible for eruptions. The extent and style of vesiculation in juvenile clasts is also related to eruption style and duration and has specifically allowed the recognition of changes in vesicular texture that represent variations from explosive to dome building activity (Mangan and Sisson, 2000; Adams et al., 2006). This study highlights a more complicated story in terms of magma storage, than that previously accepted for the Popocatepetl volcanic system and is an important contribution to ongoing research at the volcano.
机译:Popocatepetl火山的爆炸活动对周围人口稠密的地区构成威胁,因此,重要的是要在短时间内识别出喷发方式变化(爆炸对圆顶建筑)的指标。在这项研究中,我们介绍了五种主要的普林卡特彼勒喷发(约23-1.2 ka),2001年部分穹顶塌陷和2001年的小喷发中的幼年碎屑的囊泡大小分布(VSD)和基质玻璃成分分析的结果1997年(5月11日和6月14日,15日和30日)爆发。基质玻璃的主要元素分析(WDS-EPMA)通过使用Blundy和Cashman的石英-轨道-正长石酶三元系统计算平衡压力,可以估算喷出的岩浆进入不平衡(晶体与熔体之间)的深度。 (2001)。使用CSD软件通过VSD分析定量分析少年(浮石或鳞屑)岩屑的质地,以将岩浆在上升过程中经历的物理变化与造成喷发的条件联系起来。未成年碎屑的囊泡形成的程度和样式也与喷发的样式和持续时间有关,并且特别允许识别囊泡纹理的变化,这些变化代表了炸药到圆顶建筑活动的变化(Mangan和Sisson,2000; Adams等,2006)。 )。这项研究突出了一个关于岩浆储存的故事,这比以前的波波卡特佩特尔火山系统所接受的故事更为复杂,这是对该火山正在进行的研究的重要贡献。

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