综合物化探方法探测沙湾隐伏断裂带中段
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摘要
沙湾断裂带是珠江三角洲内的一组NW向断裂带,出露较少,以隐伏为主。在本次隐伏断裂探测过程中,采用了浅层地震反射波法、高密度电法及土壤氡气法,对沙湾断裂带中段隐伏断裂——大乌岗断裂、沙湾断裂、陈村断裂、紫坭断裂进行了综合探查,共发现7处异常,初步查明沙湾断裂带的通过位置等几何信息,为进一步进行钻孔验证奠定基础。
The Shawan fault zone in the Pearl River delta consists of a group of NW-striking faults,discontinuously exposed and concealed.In the detection of this group of faults,the authors adopted the integrated geophysical-geochemical method comprising geophysical survey,shallow seismic reflection method and high-density electrical method as well as geochemical survey.Integrated survey was conducted for 4 concealed faults(Dawugang fault,Shawan fault,Chencun fault and Zini fault) which belong to the Shawan fault zone.During the detection,7 anomalies were delineated,and geometrical information concerning the fault position was preliminarily obtained,thus laying the foundation for drilling verification.
The Shawan fault zone in the Pearl River delta consists of a group of NW-striking faults,discontinuously exposed and concealed.In the detection of this group of faults,the authors adopted the integrated geophysical-geochemical method comprising geophysical survey,shallow seismic reflection method and high-density electrical method as well as geochemical survey.Integrated survey was conducted for 4 concealed faults(Dawugang fault,Shawan fault,Chencun fault and Zini fault) which belong to the Shawan fault zone.During the detection,7 anomalies were delineated,and geometrical information concerning the fault position was preliminarily obtained,thus laying the foundation for drilling verification.
引文
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[2]Fuis G S.West margin of North American synthesis of recent seis-mic transects[J].Tectonophysics,1998,288:265-292.
[3]邓起东,徐锡伟,张先康,等.城市活动断裂探测的方法和技术[J].地学前缘,2003,10(1):93-104.
[4]Suzuki K,Toda S,Kusunoki K,et al.Case studies of electrical andelectromagnetic methods applied to mapping active faults beneaththe thick Quaternary[J].Engineering Geology,2000,56(1):29-45.
[5]刘菁华,王祝文,刘树田,等.城市活动断裂带的土壤氡、汞气评价方法[J].吉林大学学报:地球科学版,2006,36(2):295-297.
[6]王志成.土氡测量在海口市活动断层探测中初步应用[J].华南地震,2006,26(4):61-66.
[7]冯军,李红光,吴涛,等.河北隆尧隐伏断裂地球化学探测[J].物探与化探,2011,35(5):597-599.
[8]邓起东.城市活动断裂探测和地震危险性评价问题[J].地震地质,2003,24(4):601-605.
[9]李出安,林小明,范运岭,等.广州沙湾断裂带的主要特征[J].城市地质,2010,5(2).
[10]苏鹤军,张慧,刘旭宙.兰州刘家堡隐伏断层的地球化学探测方法试验[J].高原地震,2005,17(1):9-16.
[11]赵桂芝,肖德涛.土壤氡浓度测量现状[J].核电子学与探测技术,2007,27(3):583-587.
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