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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&#8239;°C can produce 30–35&#8239;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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • 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

  • 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