过度的脱气驱动了Nevado del Ruiz的长期火山动荡
João Lages1, Zoraida Chacón2, Julian Ramirez2
1Dipartimento DiSTeM, Università Degli Studi Di Palermo, Palermo, Italy. joaopedro.nogueiralages@unipa.it.
Scientific reports
|January 12, 2024
概括
在Nevado del Ruiz的火山气体分析显示了高的二氧化碳 (CO2) 含量和从浅层岩中显著的SO2脱气. 这种不平衡表明,可能会加速火山动荡和未来的火山爆发.
科学领域:
- 火山学 火山学是一门学科.
- 地质化学 地质化学
- 地球科学 地球科学 地球科学
背景情况:
- 尼瓦多·德尔·鲁伊斯火山表现出持续的脱气.
- 了解岩气相互作用对于预测火山爆发至关重要.
研究的目的:
- 在2018-2021年期间调查内瓦多德尔鲁伊斯的脱气来源和机制.
- 为了建模二氧化碳 (CO2) 和二氧化硫 (SO2) 排放之间的关系.
- 评估未来火山动荡的可能性.
主要方法:
- 分析火山气体组成的分析.
- 测量二氧化硫 (SO2) 的流量.
- 卫星热数据的解释.
- 脱气模型. 脱气模型.
主要成果:
- 在火山羽毛中观察到持续高的CO2/SO2比率 (5.4±1.9).
- 脱气模型表明,二氧化碳从1至4公里深处的石岩中溶出.
- 过度的SO2脱气归因于CO2丰富的气泡通过浅层岩上升.
- 显著的岩脱气 (大约. 974 mm3) 在研究期间爆发最小 (<1 mm3).
结论:
- 在Nevado del Ruiz的脱气和喷发的岩之间存在很大的不平衡.
- 增加深层二氧化碳的流入和被动脱气的中断可以加速火山动荡.
- 这些过程可能会在重大喷发之前发生.
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