Abstract: The authors have studied the activitis of Heyuan-Shaowu fault, Guangzhou-Conghua fault, Shougouling fault, Baini-Shawan fault by means of measuring gaseous mercury content with XG-4 digital mercurimeter. 296 gaseous samples were collected along 29 measurement lines. After analysing and comparing the measuring data the authors have come to get five preliminary conclusions: 1) there is higher background value of mercury content in the area where developed active fault has been preferred over ordinary area; 2) the sections showing high mercury content appear in and around active fault zone, mercury content decrease with the distance from the fault, 3) mercury content in the intense active section of the active fault is higher than that in the other section, 4) the site of anomalous mercury content commonly is in the upfaulted block and 5) the position of the buried active fault can be determined based upon the distribution of the sites of anomalous, mercury content.

Key words: Guangdong, Mercury content in soil, Active fault

摘要： 测定壤中的气汞量来研究活断层,是探测断层及其附近壤中气汞量的大小以确定断层活动性的一种地球化学方法。我们采用了XG-4型数字测汞仪于1985年11月至1986年5月先后在广东河源-邵武断裂、广州-从化断裂、广州瘦狗岭断裂、白泥-沙湾断裂、珠江-威远断裂等地布置了29条测线(图1),大部分垂直断裂走向,按一定间距取了296个样点。从测点样品所显示的气汞量的数值来看,过断层的测点气汞量值都有不同强度的升高,因此,用测汞来研究断层现代活动性显然是一种很有前途的方法。

关键词: 广东, 壤中气汞量, 活断层