Provenance of the Lower Jurassic Badaowan and Sangonghe Formations in Dongdaohaizi Depression, Junggar Basin, and Its Constraint on the Karamaili Ocean

The Paleo-Asian Ocean controlled the tectonic evolution of Northeast Asia and formed Karamaili Orogenic Belt in eastern Junggar basin. However, chronological constrain paleo-Karamaili remains unclear. In this study, we focused on sandstones Lower Jurassic Badaowan Sangonghe Formations Dongdaohaizi Depression, basin near orogenic belt. After detailed observations descriptions macroscopic features sandstone, obtained information petrology geochronology. Dickinson diagrams indicate that provenance area had characteristics a transitional recycling provenance, which is collisional belt with background oceanic-continental subduction. detrital zircon ages sediments Depression can be divided into three peaks: ~300 Ma, ~420 ~510 Ma for Formation ~310 ~410 ~500 Formation. youngest age 241 ± 2 representing an Early Permian depositional age. Combined previous studies, study represent from Ocean. During Jurassic, consistent subduction residual East induced continuous uplift region, resulting increasing exposure deep-seated rocks to provide sedimentary material. According results Ocean, as part experienced evolutionary stages: Cambrian-Early Silurian (460–540 Ma), Late Silurian-Early Carboniferous (360–440 Carboniferous–Triassic (240–340 Ma).