The Deep physical geographic characteristics and Neopaleozoic geological structural exploration of Erlian basin, Inner Mongolia, China

The Neopaleozonic of Erlian basin is rebuilt by polyphase tectonic movements, such as Hercynian, Indo-Chinese epoch, Yanshanian. It remains many series of strata (Devonian, Carboniferous, Permian etc) now, which distributions are controlled by regional deep structures. Aiming at rehandling the seismic data of Neopaleozonic, we can improve the deep S/N ratio, enhance deep energy reflection, so that the seismic reflection features are more clearly. We can determine the location of deep structures accurately through carry on the gravity data overlapping process, research regional geological characteristics integrally, use small subfield filtering methods and image enhancement technology. Integrated geophysical data and the geological survey data, we think the Erlian basin grow five deep structures of EW-NE, which have controlled clearly the geostructure evolution, the sedimentary formation, the magmatic activity, the metamorphism function, because they have a wide-scale growth and move for a long time. It's displayed by seismic data that the Neopaleozonic of Erlian basin grows generally through long-term drape uplift and erosion, there is a more serious erosion at west, a considerable remnants thickness at east in all. The Devonian distributes primarily at north of Hegen mountain structures while missed at south, Carboniferous and Permian distribute widely throughout the basin, which have a large thickness at east and north, and in other zones, they have a thickness diversity of local residue which the maximum closes to 10000 meters.