厄尔布鲁士火山中心下一个新的外围浅岩浆库模型

IF 0.7 4区 地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS Journal of Volcanology and Seismology Pub Date : 2023-06-23 DOI:10.1134/S0742046323700173
V. K. Milyukov, A. V. Myasnikov
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引用次数: 0

摘要

地壳岩浆结构具有明显的共振特性,这使得这些结构能够在其本征频率上产生二次地震波。在75米激光干涉仪的帮助下获得的应变数据用于识别厄尔布鲁士火山中心下的共振模式和估计岩浆结构的参数。这种共振模式是每个岩浆特征的独特特征,并决定了已识别的内部结构的大小和物理力学性质。本研究包含了一个局部特征的分析,该特征以弱地震脉冲的形式表现为一个紧凑的区域,该区域是2011年由俄罗斯科学院地球物理调查局(GS RAS)使用的小孔径地震仪器在厄尔布鲁士地区记录的。这些基于地震和应变观测以及微地震探测结果的研究结果表明,厄尔布鲁士火山中心存在一个直径2.5-3公里的新外围浅层岩浆库。
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A Model for a New Peripheral Shallow Magma Chamber Beneath the Elbrus Volcanic Center

Crustal magmatic structures possess pronounced resonant properties, which enable these structures to generate secondary seismic waves at their eigen frequencies. Strain data acquired with the help of a 75-meter laser interferometer were used to identify resonant modes and to estimate the parameters of the magmatic structures beneath the Elbrus Volcanic Center. Such resonant modes are unique features for each magmatic feature, and determine the size and physico-mechanical properties of an identified internal structure. The present study contains an analysis of a local feature that has manifested itself as a compact area in the form of weak seismic pulses that have been recorded in the Elbrus area using small-aperture seismic instruments operated by the Geophysical Survey of the Russian Academy of Sciences (GS RAS) in 2011. The results of these studies based on seismic and strain observations, as well as on the results of microseismic sounding, have shown the existence of a new peripheral shallow magma chamber 2.5‒3 km across in size as part of the Elbrus Volcanic Center.

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来源期刊
Journal of Volcanology and Seismology
Journal of Volcanology and Seismology 地学-地球化学与地球物理
CiteScore
1.50
自引率
28.60%
发文量
27
审稿时长
>12 weeks
期刊介绍: Journal of Volcanology and Seismology publishes theoretical and experimental studies, communications, and reports on volcanic, seismic, geodynamic, and magmatic processes occurring in the areas of island arcs and other active regions of the Earth. In particular, the journal looks at present-day land and submarine volcanic activity; Neogene–Quaternary volcanism; mechanisms of plutonic activity; the geochemistry of volcanic and postvolcanic processes; geothermal systems in volcanic regions; and seismological monitoring. In addition, the journal surveys earthquakes, volcanic eruptions, and techniques for predicting them.
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