QIANGTANG MASSIF CRUST DEFORMATION FEATURES, DIFFERENCE AND ITS GENETIC MECHANISM STUDY

Based on the integrated interpretation to the area located between 32°N and 35°N latitude,88°E and 89°E longitudes, the authors analysis the shallow and deep crust deformation of the Qiangtang Massif.Gravity,aeromagnetic,magnetotelluric and seismic surveys show that the Qiangtang Massif could be divided from north to south in the horizontal surface into three parts: the northern and the southern Qiangtang sag, the medial Armugang dome. The aeromagnetic anomaly contour line (AACL) of the medial dome is linear anomaly belts, whose amount varies between -50 nT and 260nT; the AACL of the northern sag is gently negative,whose value varies between 0 and -10nT, and its maximum aeromagnetic basement top depth is 11km;the AACL of the southern sag is gently low,positive alternating with negative, whose amount varies between -30nT and 30nT,and its maximum basement top depth is 9km.