Determination of Contractional Fault Systems in the Southern Margin of the Ordos Basin, China, by Multisource Data Processing

In this paper, multisource geoscientific data processing are used to study the reverse faults in the southern margin of Ordos basin, China, such data include NOAA data, the data of Bouguer gravity anomaly and aeromagnetic anomaly, and the multisource geophysical processing methods include upward continuations, vertical derivative and gradient image, and synthetic image processing method – remote sensing image processing and geophysical image processing under I²S600. On the basis of these results and with geological investigation in the field, the authors have determined the existence of an EW striking contractional system, a NE striking contractional system and a NW striking contractional system. These three systems reveal the evolution of geological structures along the southern margin of Ordos basis and in the north side of Qinling orogenic belt.