气候变化领域集成服务门户(CCPortal): A Novel Multidisciplinary Approach for the Thermo-Rheological Study of Volcanic Areas: The Case Study of Long Valley Caldera

CCPortal

DOI	10.1029/2020JB020331
	A Novel Multidisciplinary Approach for the Thermo-Rheological Study of Volcanic Areas: The Case Study of Long Valley Caldera
	Gola G.; Barone A.; Castaldo R.; Chiodini G.; D'Auria L.; García-Hernández R.; Pepe S.; Solaro G.; Tizzani P.
发表日期	2021
ISSN	21699313
卷号	126 期号:2
英文摘要	We propose a novel multidisciplinary approach to image the thermo-rheological stratification beneath active volcanic areas, such as Long Valley Caldera (LVC). We performed a thermal fluid dynamic model via optimization procedure of the thermal conditions of the crust. We characterize the topology of the hot magmatic bodies and the hot fluid circulation (the permeable fault-zones), using both a novel imaging of the a and b parameters of the Gutenberg-Richter law and an innovative procedure analysis of P-wave tomographic models. The optimization procedure provides the permeability of a reservoir (5.0 × 10−14 m2) and of the fault-zone (5.0 · 10−14 – 1.0 × 10−13 m2), as well as the temperature of the magma body (750–800°C). The imaging of the rheological properties of the crust indicates that the brittle/ductile transition occurs about 5 km b.s.l. depth, beneath the resurgent dome. There are again deeper brittle conditions about 15 km b.s.l., agreeing with the previous observations. The comparison between the conductive and the conductive-convective heat transfer models highlights that the deeper fluid circulation efficiently cools the volumes above the magmatic body, transferring the heat to the shallow geothermal system. This process has a significant impact on the rheological properties of the upper crust as the migration of the B/D transition. Our findings show an active magmatic system (6–10 km deep) and confirm that LVC is a long-life silicic caldera system. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Borehole temperature; long valley caldera; optimization procedure; rheology; seismic tomography; thermal regime
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/187378
作者单位	Istituto di Geoscienze e Georisorse, Consiglio Nazionale delle Ricerche, Pisa, Italy; Istituto per il Rilevamento Elettromagnetico dell'Ambiente, Consiglio Nazionale delle Ricerche, Napoli, Italy; Istituto Nazionale di Geofisica e Vulcanologia, Bologna, Italy; Instituto Volcanológico de Canarias, Santa Cruz de Tenerife, Spain
推荐引用方式 GB/T 7714	Gola G.,Barone A.,Castaldo R.,et al. A Novel Multidisciplinary Approach for the Thermo-Rheological Study of Volcanic Areas: The Case Study of Long Valley Caldera[J],2021,126(2).
APA	Gola G..,Barone A..,Castaldo R..,Chiodini G..,D'Auria L..,...&Tizzani P..(2021).A Novel Multidisciplinary Approach for the Thermo-Rheological Study of Volcanic Areas: The Case Study of Long Valley Caldera.Journal of Geophysical Research: Solid Earth,126(2).
MLA	Gola G.,et al."A Novel Multidisciplinary Approach for the Thermo-Rheological Study of Volcanic Areas: The Case Study of Long Valley Caldera".Journal of Geophysical Research: Solid Earth 126.2(2021).