Exhumation time of Jiamusi-uplift of northeastern China constrained by ages of detrital minerals

According to U-Pb dating of the detrital zircons and 40Ar/39Ar detrital micas ages of sandstone samples in Boli basin and Jixi basin around Jiamusi-uplift, it can show that no age of 500 Ma represented the Jiamusi block's basement or over 500 Ma ages are found in the Didao Formation and Muling Formation's sandstones. It indicated that the Jiamusi-uplift have not yet uplifted during the deposition of the Muling Formation. The basin group in eastern Heilongjiang should be a large-scale epicontinental basin. Combing with the analysis of sandstone provenance and conglomerate provenance, the authors think that the Jiamusi-uplift began to uplift in the late period of Early Cretaceous, was up to some certain height in the early stage of Late Cretaceous, and afforded provenance to the surrounded basins. Meanwhile, the whole basin formed in the Early Cretaceous were broke into several separated basins, as a result of the uplifting of the Jiamusi uplift.