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Method suitable for in-situ leaching sandstone type uranium-containing basin target area recognition

A geophysical and identification method technology, applied in the field of comprehensive geophysical exploration, can solve problems such as lack of geophysical problems, poor matching degree of geological problems, etc., and achieve good consistency results

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

[0003] In the actual geophysical exploration of in-situ leaching sandstone-type uranium deposits, due to the lack of systematic selection and analysis of different geophysical methods and corresponding parameters for different exploration stages, the matching degree between the method and the geological problems that need to be solved is poor

Method used

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Effect test

Embodiment 1

[0027] A comprehensive geophysical target identification method suitable for in-situ leaching sandstone-type uranium-bearing basins, the method sequentially includes the following steps:

[0028] Step 1: In the leaching sandstone type uranium-bearing sedimentary basin, divide the tectonic unit of the sedimentary basin, and determine the depression and uplift area of ​​the basin

[0029] When the basement depth of in situ sandstone-type uranium-bearing sedimentary basins is 0-600 meters, the scope of the study area is less than 500 square kilometers, and the regional gravity data with a scale of 1:200000 are used to divide the tectonic units.

[0030] Step two, in the depression area divided by step one, divide the boundary of the rock mass so as to optimize the favorable areas for uranium mineralization;

[0031] When the basement depth of the local leached sandstone-type uranium-bearing sedimentary basin is 0-600 meters, the scope of the research area is less than 500 square ...

Embodiment 2

[0035] A comprehensive geophysical target identification method suitable for in-situ leaching sandstone-type uranium-bearing basins, the method sequentially includes the following steps:

[0036] Step 1: In the leaching sandstone type uranium-bearing sedimentary basin, divide the tectonic unit of the sedimentary basin, and determine the depression and uplift area of ​​the basin

[0037] When the basement depth of in situ sandstone-type uranium-bearing sedimentary basins is 600-1500 Å, the research area ranges from 500 to 1,000 square kilometers, and the depression tectonic units are divided using regional gravity data with a scale of 1:500,000.

[0038] Step two, in the depression area divided by step one, divide the boundary of the rock mass so as to optimize the favorable areas for uranium mineralization;

[0039] When the basement depth of the local leached sandstone-type uranium-bearing sedimentary basin is 600-1500mm, the research area is within 500-1000 square kilometers...

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Abstract

The invention belongs to the field of comprehensive geophysical exploration methods, and particularly discloses an effective comprehensive geophysical method suitable for in-situ leaching sandstone type uranium-containing basin target area recognition. The method comprises the following steps: step 1, dividing an in-situ leaching sandstone type uranium-containing sedimentary basin into sedimentarybasin geodetic structure units, and determining basin depression and upheaval areas; step 2, dividing rock boundaries in the depression areas divided in the step 1 so as to preferably select favorable uranium mineralization sections; and step 3, on the basis of the uranium mineralization favorable section optimized in the step 2, determining underground geoelectric structure characteristics, anddetermining the spatial distribution and form of the sand body favorable for uranium mineralization. According to the invention, three geophysical methods of gravity, high-precision magnetic measurement and high-precision electromagnetic method are combined, the coverage is wide, the applicability is high, and the accuracy is high.

Description

technical field [0001] The invention belongs to the field of comprehensive geophysical prospecting methods, and in particular relates to an effective comprehensive geophysical method suitable for identifying targets in in-situ leaching sandstone-type uranium-bearing basins. Background technique [0002] In the field of in-situ leaching sandstone-type uranium deposit exploration, commonly used geophysical exploration methods mainly include gravity, magnetic method, and electromagnetic method. Gravity exploration methods have achieved positive results in solving geological problems such as tectonic unit division and basement fluctuations; The magnetic method plays an important role in delineating intrusive rocks, demarcating rock mass boundaries and fault structures, especially in the search for uranium and polymetallic minerals in recent years; It is a direct method to understand the distribution and burial depth of favorable ore-forming sand bodies by detecting the electrica...

Claims

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Application Information

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IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 喻翔汪硕杨龙泉梁永顺武鼎胡小婕
Owner BEIJING RES INST OF URANIUM GEOLOGY
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