| 顾及垂直形变速率影响的茅山地区重力场变化 |
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| 引用本文： | 吴晓峰,宋 浩,代宪鹏,范文华,孙君嵩.顾及垂直形变速率影响的茅山地区重力场变化[J].大地测量与地球动力学,2019,39(8):804-809. |
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| 作者姓名： | 吴晓峰 宋 浩 代宪鹏 范文华 孙君嵩 |
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| 摘 要： | 利用CORS获得的垂直形变速率，对CG-5测得的重力变化进行布格梯度改正，绘制茅山断裂带周边真实的区域重力场，并分析其变化。选取茅山断裂带附近18个相对重力点进行同步GPS-RTK测量，将测量数据进行对比分析，并将GPS所测高程变化量作为重力值归算依据；以2014年重力值为基准，将2016～2017年3期重力测量值进行梯度变化修正，绘制重力场异常等值线图，并对茅山断裂带重力场异常变化进行研究。结果表明，将未进行高程修正前的重力场差分图与修正后的进行对比，其形态发生较大变化，高梯度区域和零值线方向均发生改变。该研究成果对依据差分变化趋势判定年度异常区具有重要意义。
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| 关 键 词： | 重力场 GPS-RTK 大地水准面 茅山断裂带 布格重力异常 |
Gravity Field Variation in Maoshan Area Considering Vertical Strain Rate |
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| WU Xiaofeng,SONG Hao,DAI Xianpeng,FAN Wenhua,SUN Junsong.Gravity Field Variation in Maoshan Area Considering Vertical Strain Rate[J].Journal of Geodesy and Geodynamics,2019,39(8):804-809. |
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| Authors: | WU Xiaofeng SONG Hao DAI Xianpeng FAN Wenhua SUN Junsong |
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| Abstract: | We correct the gravity change obtained by the vertical change rate to the gravity change of CG-5 by CORS, plot the real regional gravity field map of the Maoshan fault zone, and analyze the gravity field changes in this area. 18 relative gravity points near the Maoshan fault zone are selected for synchronous GPS-RTK measurement. We compare and analyze the measured data, and calculate the height variation of the GPS as the basis of the gravity value. On the basis of the gravity value of 2014, we correct the gravity measured values of three periods from 2016 to 2017 by the gradient variation, and draw the anomalous contour map of the gravity field to study the anomalous variation of the gravity field in the Maoshan fault zone. The results show that the contrast of the gravitational field difference diagram before the elevation correction shows that the shape of the gravity field changes greatly, and the direction of the high gradient area and the zero line are all changed. The research results are of great significance for determining the annual anomaly area based on the trend of differential variation. |
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| Keywords: | gravity field GPS-RTK geoid Maoshan fault zone Bouguer gravity anomaly |
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