Contact of the Samoan plume with the Tonga subduction from intermediate and deep-focus earthquakes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F21%3A00547282" target="_blank" >RIV/67985530:_____/21:00547282 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007%2Fs10712-021-09679-9" target="_blank" >https://link.springer.com/article/10.1007%2Fs10712-021-09679-9</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10712-021-09679-9" target="_blank" >10.1007/s10712-021-09679-9</a>
Alternative languages
Result language
angličtina
Original language name
Contact of the Samoan plume with the Tonga subduction from intermediate and deep-focus earthquakes
Original language description
The Tonga subduction zone in the south-west Pacific is the fastest convergent plate boundary in the world with the most active mantle seismicity. This zone shows unique tectonic features including Samoan volcanic lineament of plume-driven origin near the northern rim of the Tonga subducting slab. The proximity of the Samoa hotspot to the slab is enigmatic and invokes debates on interactions between the Samoa plume and the Tonga subduction. Based on long-term observations of intermediate and deep-focus Tonga earthquakes reported in the Global Centroid Moment Tensor (CMT) catalog, we provide novel detailed imaging of this region. Accurate traveltime residua of the P- and S-waves recorded at two nearby seismic stations of the Global Seismographic Network are inverted for the P- and S-wave velocities and their ratio and reveal their pronounced lateral variations. In particular, they differ for the southern and northern parts of the Tonga subduction region. While no distinct anomalies are detected in the southern Tonga segment, striking low-velocity anomalies associated with a high V-p/V-s ratio are observed in the northern Tonga segment close to the Samoa plume. These anomalies spread through the whole upper mantle down to depths of similar to 600 km. Together with the fast extension of the northern back-arc Lau Basin, slab deformation and geochemical enrichment in the northern Tonga region, they trace deep-seated magmatic processes and evidence an interaction of the Tonga subduction with the Samoa plume.
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
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
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
Surveys in Geophysics
ISSN
0169-3298
e-ISSN
1573-0956
Volume of the periodical
42
Issue of the periodical within the volume
6
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
29
Pages from-to
1347-1375
UT code for WoS article
000723547600001
EID of the result in the Scopus database
2-s2.0-85120079341