DOI: 10.1007/s00531-014-1044-3
论文题名: Geophysical exploration on the subsurface geology of La Garrotxa monogenetic volcanic field (NE Iberian Peninsula)
作者: Bolós X. ; Barde-Cabusson S. ; Pedrazzi D. ; Martí J. ; Casas A. ; Lovera R. ; Nadal-Sala D.
刊名: International Journal of Earth Sciences
出版年: 2014
卷: 103, 期: 8 起始页码: 2255
结束页码: 2269
语种: 英语
英文关键词: Electrical resistivity tomography
; Feeding system
; Garrotxa volcanic field
; Monogenetic volcanism
; Self-potential
; Subsurface geology
英文摘要: We applied self-potential (SP) and electrical resistivity tomography (ERT) to the exploration of the uppermost part of the substrate geology and shallow structure of La Garrotxa monogenetic volcanic field, part of the European Neogene–Quaternary volcanic province. The aim of the study was to improve knowledge of the shallowest part of the feeding system of these monogenetic volcanoes and of its relationship with the subsurface geology. This study complements previous geophysical studies carried out at a less detailed scale and aimed at identifying deeper structures, and together will constitute the basis to establish volcanic susceptibility in La Garrotxa. SP study complemented previous smaller-scale studies and targeted key areas where ERT could be conducted. The main new results include the generation of resistivity models identifying dykes and faults associated with several monogenetic cones. The combined results confirm that shallow tectonics controlling the distribution of the foci of eruptive activity in this volcanic zone mainly correspond to NNW–SSE and accessorily by NNE–SSW Neogene extensional fissures and faults and concretely show the associated magmatic intrusions. These structures coincide with the deeper ones identified in previous studies, and show that previous Alpine tectonic structures played no apparent role in controlling the loci of this volcanism. Moreover, the results obtained show that the changes in eruption dynamics occurring at different vents located at relatively short distances in this volcanic area are controlled by shallow stratigraphical, structural and hydrogeological differences underneath these monogenetic volcanoes. © 2014, Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84939891563&doi=10.1007%2fs00531-014-1044-3&partnerID=40&md5=43b85f2c762668849f8bdb5d0f91c33f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70430
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Group of Volcanology, Institute of Earth Sciences Jaume Almera, SIMGEO (UB-CSIC), ICTJA-CSIC, c/Lluís Solé i Sabarís s/n, Barcelona, Spain; Economic and Environmental Geology and Hydrology Group, Department of Geochemistry, Petrology and Geophysical Prospecting, Faculty of Geology, University of Barcelona, Martí Franqués s/n, Barcelona, Spain; Ecology Department, University of Barcelona, Diagonal 645, Barcelona, Spain
Recommended Citation:
Bolós X.,Barde-Cabusson S.,Pedrazzi D.,et al. Geophysical exploration on the subsurface geology of La Garrotxa monogenetic volcanic field (NE Iberian Peninsula)[J]. International Journal of Earth Sciences,2014-01-01,103(8)