The article looks at the results of a comprehensive study of the mineralogic composition of sandstones and U–Pb isotopic dating of detrital zircons from the Paleozoic-Early Mesozoic deposits of the Laoeling-Grodekovo terrane in western Primorye. Studies have shown that different aged sandstones of the terrane differ markedly in their mineralogical and geochemical parameters and, hence, they were derived from different sources. Sandstones of the Kordonka Formation are made up of fragments of basic and intermediate volcanic rocks of the oceanic island arc, as well as igneous and sedimentary rock assemblages of the oceanic island-arc basement. Eroded stable cratons and uplifted basement blocks which were crystalline basement inliers either flanked by rift zones or occurring along transform faults exerted a strong control on the accumulation of sandstones of the Reshetnikovka, Barabash and Mangugai formations. The main suppliers of detritus were acidic igneous rocks with minor inputs from ancient sedimentary rocks. It may well be that the edges of rifts and the eroded encialic arc provided clastic material for the rocks of the Talma Formation. The U-Pb geochronological studies on detrital zircons made it possible to constrain the age and possible position of the igneous complexes that supplied clastic material to the sedimentary basins of the terrane. Sandstones were found to contain detrital zircons with concordant ages from 2553 to 205 Ma, with Paleozoic zircons forming several age groups being dominant. Zircons of Precambrian and Triassic ages are far fewer. In general, the revealed age ranges of detrital zircons from sandstones of the Laoeling-Grodekovo terrane agree fairly well with the known stages of granitoid magmatism manifestations in the eastern part of the Central Asian fold belt.