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地处粤东的潮汕平原发育北西向与北东向两组活动断裂。经航片仔细解译 ,发现黄岗水断裂和丰顺 -汕头断裂的部分段落呈明显水系左旋位错现象。野外调查证实了沿该两条断裂的地貌体位移 ,并选择 3处位移点作了大比例尺地形图测绘 ,对被位移地貌体进行了采样测年。经计算 ,黄岗水断裂和丰顺 -汕头断裂的全新世左旋走滑运动平均速率分别达 1 11±0 0 9～ 2 6 9± 0 2 4mm a和 3 2 6± 0 2 6mm a。这些较强活动的北西向断裂延伸入海与海域水深4 0～ 50m处的北东向牛山岛 -兄弟屿 -南澎列岛强活动断裂的交汇处是发生强震的有利部位
Located in eastern Guangdong’s Chaoshan Plain northwest and northeast to the development of two active faults. Carefully interpreted by the aerial photos, it was found that some sections of the Huanggangshui fault and the Fengshun-Shantou fault were obviously left-handed dislocation of the water system. Field surveys confirmed the displacement of the topography along the two faults and selected three displacement points for large-scale topographic mapping. Samples of the displaced topography were sampled and measured. After calculation, the average velocity of LST in the Huanggangshui fault and the Fengshun-Shantou fault is respectively 1 11 ± 0 0 9 ~ 2 6 9 ± 0 2 4mm a and 3 2 6 ± 0 2 6mm a. The strong activity of the NW strike extending into the sea and the sea depth of 40 ~ 50m north-easterly Niushan Island - Peninsula - South Penghu strong active fault at the junction of the favorable location of strong earthquakes occur