Gravitational middle layer density spectrum gaining method
An intermediate layer and density technology, applied in the field of geophysical exploration, can solve the problem of the difficulty of accurately understanding the density characteristics at the measuring point, the inability to establish the relationship between the intermediate layer density and the formation, and the inability to effectively eliminate the false anomalies of gravity anomalies And other issues
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[0033] 1) The absolute gravity value and coordinate elevation of each measuring point in the survey area were obtained through gravity collection, and then an east-west survey line in the middle of the work area was selected to calculate the Bouguer gravity anomaly data with different densities;
[0034] The calculation described in step 1) includes: calculating the normal gravity value g according to the plane coordinates of the measuring points 0 ; Calculate the Bouguer correction value Δg according to the elevation of the measuring point and the density of the intermediate layer b ; Calculate the terrain correction value Δg according to the terrain data TC ; The Bouguer gravity anomaly of the measuring point adopts the formula Δg=g-g 0 +Δg b +Δg TC Calculation, where g is the absolute gravity value of the measured measuring point.
[0035] The different densities mentioned in step 1) refer to the density range of 1.5g / cm 3 ~3.0g / cm 3 , the value step is 0.02g / cm 3 Ea...
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