Magmatic recycling of accretionary wedge: A new perspective on Silurian-Devonian I-type granitoids generation in the Chinese Altai
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F20%3A00000014" target="_blank" >RIV/00025798:_____/20:00000014 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1342937X19302412" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1342937X19302412</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.gr.2019.07.019" target="_blank" >10.1016/j.gr.2019.07.019</a>
Alternative languages
Result language
angličtina
Original language name
Magmatic recycling of accretionary wedge: A new perspective on Silurian-Devonian I-type granitoids generation in the Chinese Altai
Original language description
The mechanism for generation of Silurian-Devonian hornblende-bearing I-type granitoids in the Chinese Altai still remains rather obscure. The possibility that they are derived from the regional anatexis of the Ordovician accretionary wedge, i.e., the Habahe Group, is investigated. The Habahe Group contains a large number of intermediate-to-basic components. These components occur mainly as interlayered volcanogenic bands or admixtures and less commonly as blocks varying in size from several meters to several hundreds of meters. Geochemically, this volcanogenic component is characterized by enrichment of large-ion lithophile elements relative to many of the high-field strength elements and rather radiogenic Nd isotopic signatures (epsilonNd(t): +4.1 to +9.1). Phase equilibrium and trace element modelling indicate that partial melting of the volcanogenic component at an attainable 900–1000 °C can produce 30–35 volpercent silicic melts that show a good chemical match, in terms of major element contents and trace element patterns, with those of the local I-type granitoids. Combined with regional available data, we suggest that Silurian-Devonian hornblende-bearing I-type granitoids could be derived from the partial melting of the volcanogenic components of the Habahe Group and previously inferred large input of mantle-derived magma is un-necessary. Regional anatexis of the Ordovician accretionary wedge led to the stabilization of the wedge, which may represent an important mechanism contributing to the formation of vertically stratified continental crust in accretionary orogens in general.
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/GX19-27682X" target="_blank" >GX19-27682X: Principal mechanisms of peripheral continental growth during supercontinent cycle</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Gondwana research
ISSN
1342-937X
e-ISSN
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Volume of the periodical
78
Issue of the periodical within the volume
February
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
17
Pages from-to
291-307
UT code for WoS article
000522973500017
EID of the result in the Scopus database
2-s2.0-85074780069