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  Tectonism and Its Relation to Magmatism Around Santorini Volcano From Upper Crustal P Wave Velocity

Heath, B. A., Hooft, E. E. E., Toomey, D. R., Papazachos, C. B., Nomikou, P., Paulatto, M., Morgan, J. V., Warner, M. R. (2019): Tectonism and Its Relation to Magmatism Around Santorini Volcano From Upper Crustal P Wave Velocity. - Journal of Geophysical Research: Solid Earth, 124, 10, 10610-10629.
https://doi.org/10.1029/2019JB017699

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001098 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001098_1
Genre: Journal Article

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 Creators:
Heath, B. A.1, 2, Author
Hooft, E. E. E.1, 2, Author
Toomey, D. R.1, 2, Author
Papazachos, C. B.1, 2, Author
Nomikou, P.1, 2, Author
Paulatto, M.1, 2, Author
Morgan, J. V.1, 2, Author
Warner, M. R.1, 2, Author
Affiliations:
1External Organizations, ou_persistent22              
2Publikationen aller GIPP-unterstützten Projekte, Deutsches GeoForschungsZentrum, Potsdam, ou_44021              

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 Abstract: At extensional volcanic arcs, faulting often acts to localize magmatism. Santorini is located on the extended continental crust of the Aegean microplate and is one of the most active volcanoes of the Hellenic arc, but the relationship between tectonism and magmatism remains poorly constrained. As part of the Plumbing Reservoirs Of The Earth Under Santorini experiment, seismic data were acquired across the Santorini caldera and the surrounding region using a dense amphibious array of >14,300 marine sound sources and 156 short‐period seismometers, covering an area 120 km by 45 km. Here a P wave velocity model of the shallow, upper‐crustal structure (<3‐km depth), obtained using travel time tomography, is used to delineate fault zones, sedimentary basins, and tectono‐magmatic lineaments. Our interpretation of tectonic boundaries and regional faults are consistent with prior geophysical studies, including the location of basin margins and E‐W oriented basement faults within the Christiana Basin west of Santorini. Reduced seismic velocities within the basement east of Santorini, near the Anydros and Anafi Basins, are coincident with a region of extensive NE‐SW faulting and active seismicity. The structural differences between the eastern and western sides of Santorini are in agreement with previously proposed models of regional tectonic evolution. Additionally, we find that regional magmatism has been localized in NE‐SW trending basin‐like structures that connect the Christiana, Santorini, and Kolumbo volcanic centers. At Santorini itself, we find that magmatism has been localized along NE‐SW trending lineaments that are subparallel to dikes, active faults, and regional volcanic chains. These results show strong interaction between magmatism and active deformation.

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Language(s): eng - English
 Dates: 2019-08-092019
 Publication Status: Finally published
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1029/2019JB017699
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Title: Journal of Geophysical Research: Solid Earth
Source Genre: Journal, SCI, Scopus
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Pages: - Volume / Issue: 124 (10) Sequence Number: - Start / End Page: 10610 - 10629 Identifier: ISSN: 2169-9313
Other: Wiley
Other: American Geophysical Union (AGU)
Other: 2169-9356
CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/jgr_solid_earth