A 60 million year record of continental back-arc cyclic melting
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F19%3A00000081" target="_blank" >RIV/00025798:_____/19:00000081 - isvavai.cz</a>
Result on the web
<a href="https://www.nature.com/articles/s41561-019-0298-6" target="_blank" >https://www.nature.com/articles/s41561-019-0298-6</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41561-019-0298-6" target="_blank" >10.1038/s41561-019-0298-6</a>
Alternative languages
Result language
angličtina
Original language name
A 60 million year record of continental back-arc cyclic melting
Original language description
Continental crust forms and evolves above subduction zones as a result of heat and mass transfer from the mantle below. The nature and extent of this transfer remain debated. While it has been recognized that arc magmatism at active continental margins can be cyclical at 50 to 1 Myr timescales, such cyclicity has not been recognized in the back-arc. Here we investigate the melting of sedimentary rocks in the continental back-arc of the western Gondwana margin during the Cambrian–Ordovician Famatinian mountain building process (orogeny) of NW Argentina. New LA-ICP-MS U-Pb age of zircons that formed during crustal melting, range from 505 to 440 Ma, concentrated into age groups spaced by 10-15 Myr. This suggests multiple and cyclical melting events in the continental back-arc, which matches the > 60 Myr duration of the magmatic activity in the arc and demonstrates that thermal and magmatic cyclicity extends also to the continental hinterland. We conclude that back-arc melting reflects a long-lasting, pulsating, cyclical heat transfer from mantle to crust that leads to thorough crustal reworking, transforming sedimentary rocks into crystalline continental crust. Thus, while magma transfer from the mantle promotes crustal growth in convergent margins, cyclical melting promotes crustal maturation of the back-arc.
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
10505 - Geology
Result continuities
Project
<a href="/en/project/GA13-16315S" target="_blank" >GA13-16315S: Prograde metamorphism, crustal thickening and lower crustal flow: new concept of building of crustal root in Variscan orogen</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nature Geoscience
ISSN
1752-0894
e-ISSN
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Volume of the periodical
12
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
5
Pages from-to
215-219
UT code for WoS article
000460103000016
EID of the result in the Scopus database
2-s2.0-85061210122