气候变化领域集成服务门户(CCPortal): Effusion Rate Evolution During Small-Volume Basaltic Eruptions: Insights From Numerical Modeling

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DOI	10.1029/2019JB019301
	Effusion Rate Evolution During Small-Volume Basaltic Eruptions: Insights From Numerical Modeling
	Aravena A.; Cioni R.; Coppola D.; de' Michieli Vitturi M.; Neri A.; Pistolesi M.; Ripepe M.
发表日期	2020
ISSN	21699313
卷号	125 期号:6
英文摘要	The temporal evolution of effusion rate is the main controlling factor of lava spreading and emplacement conditions. Therefore, it represents the most relevant parameter for characterizing the dynamics of effusive eruptions and thus for assessing the volcanic hazard associated with this type of volcanism. Since the effusion rate curves can provide important insights into the properties of the magma feeding system, several efforts have been performed for their classification and interpretation. Here, a recently published numerical model is employed for studying the effects of magma source and feeding dike properties on the main characteristics (e.g., duration, erupted mass, and effusion rate trend) of small-volume effusive eruptions, in the absence of syn-eruptive magma injection from deeper storages. We show that the total erupted mass is mainly controlled by magma reservoir conditions (i.e., dimensions and overpressure) prior to the eruption, whereas conduit processes along with reservoir properties can significantly affect mean effusion rate, and thus, they dramatically influence eruption duration. Simulations reproduce a wide variety of effusion rate trends, whose occurrence is controlled by the complex competition between conduit enlargement and overpressure decrease due to magma withdrawal. These effusion rate curves were classified in four groups, which were associated with the different types described in the literature. Results agree with the traditional explanation of effusion rate curves and provide new insights for interpreting them, highlighting the importance of magma reservoir size, initial overpressure, and initial width of the feeding dike in controlling the nature of the resulting effusion rate curve. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	basaltic magmas; conduit modeling; effusion rate; effusive eruptions; numerical modeling; volcanology
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187820
作者单位	Dipartimento di Scienze della Terra, Università di Firenze, Florence, Italy; Dipartimento di Scienze della Terra, Università di Torino, Torino, Italy; Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Pisa, Italy; Dipartimento di Scienze della Terra, Università di Pisa, Pisa, Italy
推荐引用方式 GB/T 7714	Aravena A.,Cioni R.,Coppola D.,et al. Effusion Rate Evolution During Small-Volume Basaltic Eruptions: Insights From Numerical Modeling[J],2020,125(6).
APA	Aravena A..,Cioni R..,Coppola D..,de' Michieli Vitturi M..,Neri A..,...&Ripepe M..(2020).Effusion Rate Evolution During Small-Volume Basaltic Eruptions: Insights From Numerical Modeling.Journal of Geophysical Research: Solid Earth,125(6).
MLA	Aravena A.,et al."Effusion Rate Evolution During Small-Volume Basaltic Eruptions: Insights From Numerical Modeling".Journal of Geophysical Research: Solid Earth 125.6(2020).