Abstract:

By means of migration imaging technique of magnetotelluric data, and to explorat the characteristics of converted-wave layer below the deep geological structure, it is reveals the existence of composite anticline. Depressions within the basin have the features with low gravity, high magnetic and low resistivity, the sedimentary strata shows low-frequency and low-amplitude magnetic anomaly, magmatic rock have high-frequency and high-intensity magnetic anomaly, resistivity shows a three-layer structure of low-high-low in middle and eastern part of the profile, the magmatic rock has high resistivity and Paleozoic has low resistivity. Paleozoic strata exist in deep controlled by Derbugan and Wunuer-Elunchun fracture, with the depth of 2-6 km and thickness of 2-4 km. Paleozoic was composed with three anticlines, and the interface play a certain role in controlling of the shallow sag distribution. Mudstone, shale, limestone and slate are well developed in Late Paleozoic Carboniferous of Hailar basin, with these results we predicated that there are a good prospect for oil and gas exploration.

Key words: gravity, magnetic and electric, the migration imaging technique of magnetotelluric data, deep structure, Late Paleozoic, Hailar basin