DOI: 10.1002/2015GL064426
论文题名: Three-dimensional resistivity image of the magmatic system beneath Lastarria volcano and evidence for magmatic intrusion in the back arc (northern Chile)
作者: Díaz D. ; Heise W. ; Zamudio F.
刊名: Geophysical Research Letters
ISSN: 0094-9613
EISSN: 1944-9344
出版年: 2015
卷: 42, 期: 13 起始页码: 5212
结束页码: 5218
语种: 英语
英文关键词: central Andes
; magnetotellurics
; volcanoes
Scopus关键词: Deformation
; Magnetotellurics
; Central Andes
; Electrical resistivity structures
; Important features
; Magmatic intrusions
; Magmatic plumbings
; Magnetotelluric methods
; Resistivity images
; Surface deformation
; Volcanoes
; backarc basin
; deformation mechanism
; electrical resistivity
; fumarole
; magma
; magmatism
; magnetotelluric method
; three-dimensional modeling
; uplift
; volcanic gas
; Andes
; Chile
; Lastarria Volcano
英文摘要: Lazufre volcanic center, located in the central Andes, is recently undergoing an episode of uplift, conforming one of the most extensive deforming volcanic systems worldwide, but its magmatic system and its connection with the observed uplift are still poorly studied. Here we image the electrical resistivity structure using the magnetotelluric method in the surroundings of the Lastarria volcano, one of the most important features in the Lazufre area, to understand the nature of the magmatic plumbing, the associated fumarolic activity, and the large-scale surface deformation. Results from 3-D modeling show a conductive zone at 6km depth south of the Lastarria volcano interpreted as the magmatic heat source which is connected to a shallower conductor beneath the volcano, showing the pathways of volcanic gasses and heated fluid. A large-scale conductive area coinciding with the area of uplift points at a magma intrusion at midcrustal depth. Key Points Electrical resistivity images of the Lastrarria volcano The magmatic source is located to the south of Lastarria volcano Deep conductor in the back arc suggests magmatic intrusion. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938216209&doi=10.1002%2f2015GL064426&partnerID=40&md5=f6f19caf8d6bb0c9d8f8f3c513a7ba37
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9228
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Departamento de Geofísica, Universidad de Chile, Santiago, Chile
Recommended Citation:
Díaz D.,Heise W.,Zamudio F.. Three-dimensional resistivity image of the magmatic system beneath Lastarria volcano and evidence for magmatic intrusion in the back arc (northern Chile)[J]. Geophysical Research Letters,2015-01-01,42(13).