Magmatic activity and hydrocarbon potential revealed by Paleozoic collapse structures in the Hangjinqi area, northern Ordos Basin, China

Collapsed reflections of lower Ordovician carbonates and upper Carboniferous-lower Permian coal-bearing strata occur below the middle Shihezi Formation in Hangjinqi area, northern Ordos Basin. This study takes advantage three-dimensional seismic data, logging core data well-testing to investigate genesis collapsed their implications for hydrocarbon potential. These collapse structures have a subcircular appearance map view. The columnar basement volcanic tuff around indicate that formation these are related magmatic activity. Most terminate upward H1 member Formation, which explains its greater thickness supports hypothesis activity occurred during depositional stage early Permian. can increase space reservoirs, magma conduit also regional sedimentary cap rock above improve sealing capacity rock. results provide insights into potential Paleozoic rocks