Abstract
AbstractThe Jiaodong Peninsula of eastern Shandong Province comprises the Jiaobei terrain of North China affinity and the Sulu ultrahigh-pressure metamorphic terrain. In this study, we present zircon U-Pb ages, major- and trace-element data, and Sr-Nd-Pb isotopic compositions of intermediate to mafic dikes from the Linglong region of the Jiaobei terrain and the Rushan region of the Sulu terrain to discuss the nature of the mantle source(s) beneath eastern China during the Early Cretaceous. Zircon U-Pb dating yields Early Cretaceous dike emplacement ages ranging from ∼124 to ∼120 Ma for the Linglong region and from ∼118 to ∼108 Ma for the Rushan region. Dikes from both regions are all potassic, with “arc-like” trace-element distributions as well as high unradiogenic Pb isotopic composition, low initial eNd values (−19.64 to −10.80), and high radiogenic 87Sr/86Sr ratios (0.7075–0.7112), suggesting the involvement of an extensively enriched mantle component. Such isotopic characteristics are found in contemp...
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.
