Gravity survey in the Minghsiung-Peikang area, southwestern Taiwan: possible westward-extension of the Meishan fault

A detailed gravity survey has been carried out in the Minghsiung-Peikang area, southwestern Taiwan. This survey covers an area of about 260 km². The Bouguer anomaly map is relatively simple. Except for some closed gravity low areas near Hsinkang, most contours of the map trend in the NNW-SSE direction. The anomaly more or less decreases gradually from the WSW to the ENE. This implies that the strata in this area is likely to dip to the northeast. The distribution patterns of residual and second derivative Bouguer anomalies show some specific characteristics which indicate the possibility of the westward extension of the Meishan fault from Minghsiung. -from Authors