@article{23,
  keywords = {Bohemian Massif, Continental arc, H melting, migmatite, relamination},
  author = {Radmila Nahodilov{\'a} and Pavl{\'\i}na Hasalov{\'a} and Pavla {\v S}t{\'\i}psk{\'a} and Karel Schulmann and Prokop Z{\'a}vada and Jitka M{\'\i}kov{\'a} and Andrew Kylander-Clark and Petra Maierov{\'a}},
  title = {Exhumation of subducted continental crust along the arc region},
  abstract = {The Kutn{\'a} Hora crystalline complex (KHCC) in the Bohemian Massif is a HP/HT complex adjacent to the magmatic arc. It is dominated by migmatite, orthogneiss and granulite with bodies of eclogite and peridotite. The KHCC migmatite consists of K-feldspar, plagioclase, quartz, phengite, biotite, garnet and kyanite. Melting conditions were estimated at 780 {\textdegree}C and >16 kbar and inferred melt volume varies between 1 and 4 vol\%. Peak temperature is 865 {\textdegree}C at 18{\textendash}19 kbar followed by decompression in the presence of melt to 12{\textendash}13 kbar and 770{\textendash}800 {\textdegree}C. U-Pb monazite geochronology reveals a spread of ages between 550 Ma and 330 Ma. REE patterns show low Yb/Gd for 550{\textendash}500 Ma, high Yb/Gd for ages at  480 Ma, and decreasing Yb/Gd towards  340 Ma. First monazite in equilibrium with garnet constrains the HP metamorphism to  350 Ma, which is followed by recrystallization of monazite down to 325 Ma. U-Pb zircon geochronology displays an age range from  670 Ma to  430 Ma. The broad age range records a span of protolith crystallization and/or old metamorphism. The presence of HP ky + mu migmatite, their P{\textendash}T path, protolith zircon and monazite metamorphic ages and whole-rock geochemistry are similar to HP migmatites in the Eger crystalline complex (ECC) in the Saxothuringian domain further in the west. We propose the following geodynamic scenario for subduction-relamination-exhumation mechanism: (i) subduction of the Saxothuringian continental lithosphere at 360 Ma related to early stage of trans-lithospheric diapirism triggered by arc-related magma weakening; (ii) large-scale emplacement of relaminant into the upper plate lithosphere at 350{\textendash}340 Ma; and (iii) return flow of the relaminant along the subduction interface (the ECC) and emplacement of relaminant in the upper{\textendash}middle crust in the rear part of the arc system (the KHCC) at 340{\textendash}330 Ma.},
  year = {2020},
  booktitle = {Gondwana Research},
  journal = {Gondwana Research},
  series = {Gondwana Research},
  volume = {80},
  pages = {157-187},
  issn = {1342-937X},
  url = {http://www.sciencedirect.com/science/article/pii/S1342937X19303016},
  doi = {https://doi.org/10.1016/j.gr.2019.10.011},
}