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Rapid stitching method for magnetic anomaly grid

A magnetic anomaly and grid technology, applied in the field of uranium ore geophysical exploration, can solve the problems that affect the comprehensive evaluation effect of geological and geophysical prospecting, there is no clear magnetic anomaly grid method process, no clear method, etc., and achieve high effectiveness , quickly understand and reduce the effect of culling

Active Publication Date: 2020-04-21
BEIJING RES INST OF URANIUM GEOLOGY
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Problems solved by technology

[0003] In the geophysical exploration and evaluation of uranium resources, in the past, there was no clear method or no clear method for fast stitching of magnetic anomaly grids, which directly affects the comprehensive evaluation of subsequent geological and geophysical prospecting. Therefore, it is urgent to provide a magnetic Abnormal grid fast stitching method

Method used

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Embodiment Construction

[0019] The present invention is described in further detail below in conjunction with embodiment.

[0020] Taking Jiangxi Xiangshan uranium ore field as an example, the present invention relates to a fast stitching method for magnetic anomaly grids, which includes the following steps in sequence:

[0021] Step 1. In the selected uranium resource exploration area, divide A and B to carry out high-precision ground magnetic surveys respectively. The scale of A zone is 1:10,000, and the scale of B zone is 1:5000. The line direction and point distance are inconsistent, but there are partially overlapping magnetic measurement data in A and B areas, forming magA and magB grid maps respectively. The interpolation method adopts the minimum curvature method, and the interpolation interval is selected as 1 / 4 grid size;

[0022] Step 2, magA and magB in the step 1 are carried out polarization processing, form gridA and gridB grid map after polarization;

[0023] In the step 2, the chemic...

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Abstract

The invention belongs to the technical field of uranium mine geophysical exploration, and particularly relates to a rapid stitching method for a magnetic anomaly grid. The method comprises the steps of 1, dividing a uranium resource exploration area into an area A and an area B to carry out ground high-precision magnetic survey respectively, and carrying out different scales in the two areas, wherein the area A and the area B are partially overlapped in magnetic data, and grid diagrams are formed respectively; 2, carrying out reduction to the pole treatment on the grid diagrams in the step 1;3, performing trend surface removal on the two grid diagrams in the step 2; 4, starting to stitch the grids with the trend surface being removed in the step 3; 5, selecting a weight for grid diagram correction; 6, expanding the correction width of the grid diagrams to obtain corrected grid diagrams; and 7, interpolating the two corrected grid diagrams in the step 6, and repeating the steps 3-7 until a finally stitched grid diagram is formed. According to the invention, the magnetic anomaly data of the same measurement area can be spliced and integrated accurately and quickly.

Description

technical field [0001] The invention belongs to the technical field of uranium ore geophysical prospecting, and in particular relates to a fast stitching method for magnetic anomaly grids. Background technique [0002] In conventional geophysical exploration of uranium resources, airborne magnetic method and ground high-precision magnetic method are relatively effective and direct detection methods for uranium ore exploration. Due to the large size of the same exploration area, it often takes a long time (several years) to complete the area survey task of the whole area, or the same exploration area is completed by multiple geophysical survey teams, the magnetic anomaly grid may be different periods, Generated under different measurement intervals and different projections, the magnetic anomaly grid may also be calculated and formed by different interpolation algorithms. In order to timely grasp the magnetic anomaly characteristics of the entire survey area, it is particular...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08G01V3/38
CPCG01V3/081G01V3/38
Inventor 喻翔张东辉武鼎杨龙泉胡小婕汪硕梁永顺
Owner BEIJING RES INST OF URANIUM GEOLOGY
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