Sequence Stratigraphy with Fills of Volcanic Rocks in Xujiaweizi Faulted Depression of Songliao Basin, Northeast China

Volcanic rocks widely developed during late Jurassic-Farly Cretaceous in Xujiaweizi faulted depression of Songliao basin, Northeast China. The basin filling geometric pattern of volcanic eruptive rocks depends on both of the eruptive locations in a basin and structural styles of fault terraces. It is divided into three types by eruptive locations and occurrences of eruptive rocks, including the pattern of eruption along fault and occurrence (PEAFO), the pattern of eruption on footwall of a fault and occurrence (PEOFO) and the pattern of eruption on hangingwall of fault and occurrence (PEOHO) in Xujiaweizi fault depression. Those basin filling patterns of volcanic eruptive rocks are with specific geometric characteristics, occurred at different stages of early lowstand, late lowstand and transgressive, controlling or affecting basin topography, sedimentation, the geometry of sedimentary body and sequence architecture during a sequence evolution. The sequence stratigraphic models may be used in oil and gas exploration to predict reservoirs.