THE INFLUENCE OF COASTAL MOUNTAINS ON MARINE GRAVITY DATA
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摘要:
在处理近海重力数据时, 近海山体对船测重力数据的影响是不能忽略的。笔者提出一种校正近海山体对船测重力数据影响的方法, 使用点元法计算近海山体对船测重力数据的影响值, 并给出其消除方法。以位于崂山邻近海域的工区为例, 通过计算崂山的影响值可知, 测点距山体距离与影响值成反比, 最大可达0.12mGal, 当距离超过20km, 影响值忽略不计。通过上述方法, 可以得到更加准确的海洋重力数据, 从而进行更加有效的地质解释。
Abstract:Abstract: When the offshore gravity data is processed, the impact of coastal mountains on ship gravity data cannot be ignored. This paper deals with the methodology to reduce the influence of offshore mountain masses on ship measured gravity data, and the point element method is introduced to calculate the value of the influence. Then a method is given to eliminate the influence. Taking the working area off the Laoshan mountains as an example, by calculating the influence value of Laoshan, the distance between the measured point and the mountain is inversely proportional to the influence value, and the maximum is 0.12 mGal. When the distance exceeds 20 km, the influence value is neglected. Through the above method, more accurate ocean gravity data can be obtained for better geological interpretation.
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Key words:
- marine gravity data /
- coastal mountain /
- point element method
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