| 均衡重力异常计算方法 |
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| 引用本文： | 程振炎,尹春霞,朱金路.均衡重力异常计算方法[J].物探与化探,1985,9(5):340-346. |
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| 作者姓名： | 程振炎 尹春霞 朱金路 |
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| 摘 要： | 本文提出了采用埃利均衡补偿模式计算5ˊ×5ˊ平均均衡重力异常的一种方认。计算是使用5ˊ×5ˊ平均高程值,将A～O带分为近、中、远三个区:近区用1ˊ40〞×1ˊ40〞的柱体,中区用5ˊ×5ˊ的柱体,远区用15ˊ×15ˊ的柱体,分别采用矩形柱体、质线和质点的正演公式计算地形一均衡校正值。从华南某地区的均衡重力异常图可以看出,根据均衡重力异常可以消除由地壳厚度变化而产生的区域场,突出局部异常场。
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COMPUTING METHOD FOR ISOSTATICGRAVITY ANOMALIES |
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| Institution: | Institute of Geology, Chinese Academy of Geological Sciences |
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| Abstract: | This paper proposes a technique for adopting Airy isostatic compensation model to calculate the 5ˊ×5ˊ average isostatic gravity anomaly. In calculation, 5ˊ×5ˊ average elevation was used and A～Q zone was divided into three areas, i. e., the near, the middle and the distant terrain. Columns of 1ˊ40" ×1ˊ40", 5ˊ×5ˊ and 15ˊ×15ˊ are used respectively for the near, the middle and the distant terrain, and forward formulae for rectangular column, mass line and particle are adopted to calculate topography-isostatic corrections. It is demonstrated from the isostatic gravity anomaly map of a certain area in South China that the isostatic gravity anomaly can eliminate the regional field caused by variation in thickness of the crust, and thus show prominently the local anomalous field. |
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