Joint seismic and gravity data inversion to image intra-crustal structures: The Ivrea Geophysical Body along the Val Sesia Profile (Piedmont, Italy)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F21%3A00544667" target="_blank" >RIV/67985530:_____/21:00544667 - isvavai.cz</a>
Result on the web
<a href="https://www.frontiersin.org/articles/10.3389/feart.2021.671412/full" target="_blank" >https://www.frontiersin.org/articles/10.3389/feart.2021.671412/full</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3389/feart.2021.671412" target="_blank" >10.3389/feart.2021.671412</a>
Alternative languages
Result language
angličtina
Original language name
Joint seismic and gravity data inversion to image intra-crustal structures: The Ivrea Geophysical Body along the Val Sesia Profile (Piedmont, Italy)
Original language description
We present results from a joint inversion of new seismic and recently compiled gravity data to constrain the structure of a prominent geophysical anomaly in the European Alps: the Ivrea Geophysical Body (IGB). We investigate the IGB structure along the West-East oriented Val Sesia profile at higher resolution than previous studies. We deployed 10 broadband seismic stations at 5 km spacing for 27 months, producing a new database of similar to 1000 high-quality seismic receiver functions (RFs). The compiled gravity data yields 1 gravity point every 1-2 km along the profile. We set up an inversion scheme, in which RFs and gravity anomalies jointly constrain the shape and the physical properties of the IGB. We model the IGB's top surface as a single density and shear-wave velocity discontinuity, whose geometry is defined by four, spatially variable nodes between far-field constraints. An iterative algorithm was implemented to efficiently explore the model space, directing the search toward better fitting areas. For each new candidate model, we use the velocity-model structures for both ray-tracing and observed-RFs migration, and for computation and migration of synthetic RFs: the two migrated images are then compared via cross-correlation. Similarly, forward gravity modeling for a 2D density distribution is implemented. The joint inversion performance is the product of the seismic and gravity misfits. The inversion results show the IGB protruding at shallow depths with a horizontal width of similar to 30 km in the western part of the profile. Its shallowest segment reaches either 3-7 or 1-3 km depth below sea-level.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10507 - Volcanology
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Frontiers in Earth Science
ISSN
2296-6463
e-ISSN
2296-6463
Volume of the periodical
9
Issue of the periodical within the volume
May
Country of publishing house
CH - SWITZERLAND
Number of pages
17
Pages from-to
671412
UT code for WoS article
000659893100001
EID of the result in the Scopus database
2-s2.0-85107594900