Abstract: Tabei uplift tensional tectonics belt distributed in Luntai fault-uplift at its axis, mostly formed in early period of Himalayan event, controlled by the left-lateral couple of force, resulted from NW-SE striking local tensile stress field caused by sinistral torsion of the pre-existing fault in early period of Himalayan orogeny. Faults appear in a left-lateral echelon arrangement in plane and as small-sized graben combination in section. The deeper part of faults formed negative inverted structure along with the pre-existing fault. Fold structure associated with the fault distributed along fault strike, controlled by faulting. Tabei uplift tensional tectonics belt is. expected to have satisfactory oil and gas prospect due to its favorable structural position.

Key words: Graben, Fault, Fold, Shear structural system, Stress field