摘要
应用美国LaCoste-Rombcrg D型重力仪可以进行微重力方法探测,在良好条件下观测精度可以达到2—3μGal.给出一个微重力探查的实例,在30m^2的室内面积上,进行30cm×30cm、50cm×50cm 的测点网的微重力测量.经常规的、与第一次给出的建筑物重力效应改正对观测重力值进行改正,得到经改正的重力场值.对于三个小幅度重力异常圈闭进行了正演模拟分析与作出解释.通过浅地震探测和挖掘验证,各小异常的解释结果与实际情况基本上相符或一致.这样,对微重力方法的探查能力给出了初步分析研究的结果.
Microgravity surveys can be carried out with the LaCoste—Romberg D gravimeter.The observationprecision will reach 2—3 Gal in a good condition.An example of this has been given in this paper.Microgravity surveys were carried out in a room with an area of 30m^2with survey point of 30cm×30cm,50cm×50cm.The corrected gravity values have been obtained through the correction of the building effecton the normal results.Forward calculation modelling and analysis were made on the three small—scalegravity anomaly closures and explainations have been gotten based on them.Through shallow seismic sur- vcy and cxcavations,it has bcen proved that explorations on small—scale anomalies ar(?) basiclly same as ac(?)tual situation.Thus preliminary results are obtained through this study show explorating ability ofmicrogravity mothod.
出处
《地球物理学进展》
CSCD
1993年第3期96-104,共9页
Progress in Geophysics
基金
国家自然科学基金
