Detrital Zircon U-Pb Geochronology and Provenance Tracing of the Fan Deltas along the Southwestern Slope of the Shijiutuo Uplift
Zhao Meng
Xu Changgui
Du Xiaofeng
Wang Qingbin
Abstract：To trace sedimentary Source-to-Sink systems of the southwestern Shijiutuo uplift,Bohai bay basin,6 sandstone cuttings from 3 fan deltas of the third member of Dongying Formation (Ed3),along the southwestern slope of Shijiutuo uplift,were systematically sampled for detrital zircon U-Pb dating analysis in this study.It is found that sediments of the western fan delta (C6-4-4) were characterized with abundant Cretaceous zircons and a notable peak at 110 Ma,controlled by volcanic rocks of Cretaceous Yixian Formation.The sediments of the middle fan delta (C6-4-3,C6-4-6D) and the eastern fan delta (C6-4-5D) were characterized by high percentage of Jurassic zircons and a 152 Ma or 168 Ma peak,dominated by volcanic rocks of Jurassic Lanqi Formation,while their Paleozoic zircons derived from the Mesozoic sedimentary rocks.Moreover,all the samples received Archean-Proterozoic zircons from the exposed basement.This study shows that all the source strata can be traced by detrital zircon U-Pb dating except for the Paleozoic carbonate.The diversity of the provenances of the fan deltas was controlled by the inclination of the source strata:as the Mesozoic strata inclined to northwest,the Cretaceous strata dominated the western fan delta while the Jurassic strata controlled the middle and eastern fan deltas.
Keywords：provenancedetrital zircon U-Pb agethe Cretaceous Yixian Formationthe Jurassic Lanqi Formationthe Shijiutuo upliftsedimentarypetroleum geology
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 1984-1993 )