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Petrogenesis and tectonic implication of Paleoproterozoic granites and granulites in the Fengzhen area of North China craton

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F17%3A43913048" target="_blank" >RIV/62156489:43410/17:43913048 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216305:26620/17:PU136044

  • Result on the web

    <a href="https://doi.org/10.1016/j.precamres.2017.10.015" target="_blank" >https://doi.org/10.1016/j.precamres.2017.10.015</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.precamres.2017.10.015" target="_blank" >10.1016/j.precamres.2017.10.015</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Petrogenesis and tectonic implication of Paleoproterozoic granites and granulites in the Fengzhen area of North China craton

  • Original language description

    The North China Craton (NCC) is one of the oldest cratons in the world that preserves the records of many important geological events in the early evolution of the Earth. However, the early Precambrian tectonic evolution history of the NCC is still controversial. Here we report Paleoproterozoic leucogranites, garnet granites and granulites in the Fengzhen area that constitutes a junction between the Khondalite Belt and the Trans-North China Orogen (TNCO). The leucogranites have high SiO2 content (75-85 wt%), and magmatic zircon U-Pb age of 2199 +/- 3 Ma. Their zircons have slightly various epsilon Hf-(t) values (-0.45 to 1.41) with T-DM model ages of 2.5-2.6 Ga. The granites show strong LREE enrichment with La/Yb-cn ratio of 12-176, and have high initial Nd isotope (epsilon(Nd(t)) = 3.5-4.5). Most of them display positive Eu anomaly, excluding fractional crystallization contribution on the high Si feature. The leucogranite was produced by melting of Late Archean felsic TTGs (tonalite-trondhjemite-granodiorite) and addition of juvenile crust. Magmatic zircons yield the garnet granite age of 2002 3 Ma. The zircons show various epsilon Hf-(t) values (-5.8 to 7.1) and T-DM model ages (2.1-2.6 Ga). Low initial epsilon(Nd(t)) isotope value (-4.2 to-8.3) was determined in the granites. The granulites are high pressure metamorphic rocks with a peak pressure of 12.0 +/- 0.8 kbar, and have similar metamorphic age of 1967 10 Ma to the garnet granites. This indicates that the Fengzhen area underwent 2-Ga inter-continental orogeny, in which the melting of sedimentary rock formed the garnet granites. Similarly, sodic TTG melting to form K-rich leucogranites also needs high pressure. However, the leucogranite age is obviously older than the peak metamorphic timing of continent-continent collision. This implies that the Fengzhen area may have underwent arc-continental collision at 2.2 Ga.

  • 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

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2017

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Precambrian Research

  • ISSN

    0301-9268

  • e-ISSN

  • Volume of the periodical

    302

  • Issue of the periodical within the volume

    November

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    14

  • Pages from-to

    298-311

  • UT code for WoS article

    000415908200016

  • EID of the result in the Scopus database

    2-s2.0-85032736391