《Table 2 Basic information of borehole in the quaternary borehole database of the 1∶50 000Shaliu riv

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《河北省1:50000沙流河幅第四系钻孔数据库》

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The drilling borehole in the survey is PZK10，with a depth of 301 m，penetrating the Cenozoic.Mechanical core drilling was employed in borehole construction，the caliber of which was 108 mm.PVC pipes were used as core boxes，so as to conduct core sampling and preservation.Comprehensive logging was conducted after borehole drilling was finished.JGS-1 comprehensive digital logging equipments manufactured by Chongqing Geological Instrument Factory were used in filed logging，and potential difference was indirectly measured by making use of automatic compensating principle of the potentiometer；an induced polarization（IP）logging，DZD–6A multifunctional direct current（IP）apparatus，also manufactured by Chongqing Geological Instrument Factory，were used.Comprehensive logging of boreholes in aspects of apparent resistivity，natural potential，natural gamma，borehole temperature，IP and borehole deviation was conducted.For technical indexes，Specifications for Geophysical Logging of Coal（DZ/T0080–1993）and Working Specification for Hydrogeological Logging（DZ/T0181–1997）were followed.After field measurement was finished each day，the collected data and information were be transferred from apparatus to digital storage hard disk，to check whether the collected data files，field record，point coordinate of the measurement point，dot mark and other information were correct and not missed.After it was checked correctly，it would then be stored for later processing.