Abstract
Using cathodoluminescence (CL) imaging and LA-ICP-MS in site U-Pb isotope dating technigue, this paper presents zircon U-Pb dating for the gabbro from the Baihua igneous complex in Tianshui area, eastern Gansu pvovince and reveals interesting tectonic implication. Baihua igneous complex consists mainly of pyroxenite-gabbro (diorite)-diorite-quartz diorite. They form a complete comagmatic evolutionary series. The tectonics environment discrimination of trace element geochemistry reveals the igneous complexs formed in an island-arc setting. The LA-ICP-MS single-zircons U-Pb age of the gabbro from Baihua igneous complex is (449.7 ± 3.1) Ma (MSWD = 1.9), which shows that the forming time of the island-arc type magmatite in northern zone of West Qinling is Late Ordovician, also reveals that the timing of subduction of paleo-ocean basin represented by the Guanzizhen ophiolite and resulting island-arc-type magmatic activities is probably Middle-Late Ordovician.
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.
