English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/97569
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Investigation of the inner structure of La Crosa de Sant Dalmai maar (Catalan Volcanic Zone, Spain)

AuthorsBolós, Xavier ; Barde-Cabusson Stéphanie ; Pedrazzi, Dario ; Martí Molist, Joan ; Casas, Albert; Himi, M.; Lovera, R.
KeywordsGeoelectrical methods
Maar-diatreme
Gravity survey
Magnetic survey
Drill core
Catalan Volcanic Zone
Issue Date2012
PublisherElsevier
CitationJournal of Volcanology and Geothermal Research 247-248: 37- 48 (2012)
AbstractLa Crosa de Sant Dalmai volcano is the largest volcanic edifice of the Catalan Volcanic Zone (NE Spain). It is a very well preserved maar-type structure, 1.5. km in diameter, excavated at the contact between a hard substrate and a soft substrate formed by Palaeozoic granites and Pliocene and Quaternary gravels, respectively. In order to infer the uppermost inner structure of La Crosa de Sant Dalmai maar and to characterise its main geological and tectonic constraints, we have performed a multiparametric geophysical study including gravimetry, magnetometry, self-potential, and electrical resistivity tomography. The results obtained together with a field geology revision and additional geological data from two drill cores, provide a detailed picture of the post-eruptive maar infill sequence as well as of the uppermost part of the maar-diatreme structure. This information helps in understanding the origin and subsequent evolution of the volcano, which included an alternation of phreatomagmatic and Strombolian phases. Geophysical data show that the last Strombolian phase, which culminated with the formation of a scoria cone inside the maar, was associated with a NW-SE trending regional fault. The little erosion and degradation of the original tephra ring suggest a much younger age of La Crosa de Sant Dalmai maar than was previously stated. © 2012 Elsevier B.V.
Publisher version (URL)http://dx.doi.org/10.1016/j.jvolgeores.2012.08.003
URIhttp://hdl.handle.net/10261/97569
DOI10.1016/j.jvolgeores.2012.08.003
Identifiersdoi: 10.1016/j.jvolgeores.2012.08.003
issn: 0377-0273
Appears in Collections:(ICTJA) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.