Abstract
Zircon U-Pb dating was carried out for a number of the metamorphic rocks of different grades in the southern part of the Dabie terrain. They include regional orthogneisses and enclosed phyllite in South Dabie unit as well as schist and amphibolite in Susong metamorphic belt. The ages of one orthogneiss sample indicate an emplacement time of its protolith at Neoproterozoic (576±49Ma) and a metamorphic event at 245±33Ma. Ages of 400 to 500Ma were obtained for the samples of the orthogneiss and phyllite in South Dabie ultrahigh pressure terrain as well as schist and amphibolite in Susong metamorphic belt suggesting that these rocks were affected by a tectono-thermal event at Early Palaeozoic. This implies that the rocks were not subducted to mantle depths by plate subduction and did to suffer resetting of U-Pb isotopic system by ultrahigh pressure metamorphism at Triassic.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
