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DOI | 10.1038/s41561-018-0194-5 |
Influence of eruptive style on volcanic gas emission chemistry and temperature | |
Oppenheimer, Clive1; Scaillet, Bruno2; Woods, Andrew3; Sutton, A. Jeff4; Elias, Tamar4; Moussallam, Yves1,5 | |
2018-09-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2018 |
卷号 | 11期号:9页码:678-+ |
文章类型 | Article |
语种 | 英语 |
国家 | England; France; USA |
英文摘要 | Gas bubbles form as magmas ascend in the crust and exsolve volatiles. These bubbles evolve chemically and physically as magma decompression and crystallization proceed. It is generally assumed that the gas remains in thermal equilibrium with the melt but the relationship between gas and melt redox state is debated. Here, using absorption spectroscopy, we report the composition of gases emitted from the lava lake of Kilauea Volcano, Hawaii, and calculate equilibrium conditions for the gas emissions. Our observations span a transition between more and less vigorous-degassing regimes. They reveal a temperature range of up to 250 degrees C, and progressive oxidation of the gas, relative to solid rock buffers, with decreasing gas temperature. We suggest that these phenomena are the result of changing gas bubble size. We find that even for more viscous magmas, fast-rising bubbles can cool adiabatically, and lose the redox signature of their associated melts. This process can result in rapid changes in the abundances of redox-sensitive gas species. Gas composition is monitored at many volcanoes in support of hazard assessment but time averaging of observations can mask such variability arising from the dynamics of degassing. In addition, the observed redox decoupling between gas and melt calls for caution in using lava chemistry to infer the composition of associated volcanic gases. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000443302900016 |
WOS关键词 | KILAUEA VOLCANO ; EREBUS VOLCANO ; BASALTIC MAGMAS ; SUBMARINE LAVAS ; OXIDATION-STATE ; SULFUR ; ANTARCTICA ; WATER ; SPECTROSCOPY ; PRESSURE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34924 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Cambridge, Dept Geog, Cambridge, England; 2.Univ Orleans, CNRS, Inst Sci Terre Orleans, BRGM, Orleans, France; 3.Univ Cambridge, BP Inst, Cambridge, England; 4.US Geol Survey, Hawaiian Volcano Observ, Hawaii Natl Pk, Volcano, HI 96785 USA; 5.Univ Blaise Pascale, CNRS, IRD, Lab Magmas & Volcans,OPGC, Clermont Ferrand, France |
推荐引用方式 GB/T 7714 | Oppenheimer, Clive,Scaillet, Bruno,Woods, Andrew,et al. Influence of eruptive style on volcanic gas emission chemistry and temperature[J]. NATURE GEOSCIENCE,2018,11(9):678-+. |
APA | Oppenheimer, Clive,Scaillet, Bruno,Woods, Andrew,Sutton, A. Jeff,Elias, Tamar,&Moussallam, Yves.(2018).Influence of eruptive style on volcanic gas emission chemistry and temperature.NATURE GEOSCIENCE,11(9),678-+. |
MLA | Oppenheimer, Clive,et al."Influence of eruptive style on volcanic gas emission chemistry and temperature".NATURE GEOSCIENCE 11.9(2018):678-+. |
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