Method for identifying and positioning favorable sand body for ore-forming of sandstone-type uranium ore in basalt coverage area

A favorable sand body, identification and positioning technology, applied in the field of uranium mineralization prediction, can solve the problems of slow and unsatisfactory sandstone-type uranium ore prospecting progress, and achieve good consistency

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

[0004] The purpose of the present invention is to address the deficiencies of the prior art, and provide a method for identifying and locating favorable sand bodies in sandstone-type uranium ore-forming area...

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  • Method for identifying and positioning favorable sand body for ore-forming of sandstone-type uranium ore in basalt coverage area
  • Method for identifying and positioning favorable sand body for ore-forming of sandstone-type uranium ore in basalt coverage area
  • Method for identifying and positioning favorable sand body for ore-forming of sandstone-type uranium ore in basalt coverage area

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Embodiment Construction

[0050] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0051] A method for identifying and locating favorable sand bodies for ore-forming sandstone-type uranium deposits in basalt-covered areas, the method comprising the following steps:

[0052] Step 1: Identify the extent of the surface basalt overburden

[0053] Collect a 1:200,000 geological and mineral map of the study area, delineate the area covered by surface basalt on the map; determine the age of basalt eruption and possible intrusive strata on the comprehensive stratigraphic columnar section map.

[0054] Step 2: Identify the basement depth of the basalt-covered area

[0055] The 200,000 gravity data of the basalt-covered area were collected, and the Parker inversion method was used to perform quantitative inversion, and the basement depth map of the basin in the study was calculated. The area where the basement depth is less than 100m is def...

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Abstract

The invention belongs to the technical field of uranium mineralization prediction, and particularly relates to a method for identifying and positioning a favorable sand body for ore-forming of a sandstone-type uranium ore in a basalt coverage area. The method comprises the steps of 1, finding out the range of a basalt coverage area on the ground surface; 2, calculating the basement burial depth ofthe basalt coverage area; 3, finding out the basement lithology of the basalt coverage area and determining a favorable sandstone-type uranium ore-forming section, wherein the step includes the sub-steps of 3.1, interpreting the basement lithology according to aeromagnetic data, and 3.2, determining a favorable sandstone-type uranium ore-forming section; 4, finding out characteristics of the sandbody in the sedimentary stratum under the basalt coverage, wherein the step includes the sub-steps of 4.1, carrying out broadband magnetotelluric profile measurement, and 4.2, finding out characteristics of the sand body in the sedimentary stratum under the of basalt coverage; 5, identifying and positioning a favorable sandstone-type uranium ore ore-forming sand body, wherein the step includes the sub-steps of 5.1, identifying and positioning a favorable ore-forming sand body in a basin area, and 5.2, identifying and positioning a favorable ore-forming sand body in a favorable riverway development area of an upheaval area; and 6, verifying the favorable ore-forming sand body through drilling.

Description

technical field [0001] The invention belongs to the technical field of uranium ore-forming prediction, and in particular relates to a method for identifying and locating favorable sand bodies of sandstone-type uranium deposits in basalt-covered areas. Background technique [0002] At present, the sandstone-type uranium resources produced abroad under basalt cover amount to 660,000 tons, which shows great value for uranium ore prospecting. The study found that in addition to water vapor, the fluid composition in the basalt thermal generation zone also has H 2 , He, N 2 , Na, K, CO 2 、CH 3 , halogen, sulfate, etc., in the fluid migration channel, the water-rock interaction is strengthened, the fluid extracts uranium in the surrounding rock, and redistributes it in ancient river valleys, permeable layers, sandstone layers, and sandstone layers in the upper part of the weathered crust, forming Enrichment ore of uranium. Therefore, identifying and locating favorable sand bod...

Claims

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Application Information

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IPC IPC(8): G01V11/00G01V3/08G01V3/38
CPCG01V3/081G01V3/38G01V11/00
Inventor 李子颖刘武生李西得吴曲波汪硕
Owner BEIJING RES INST OF URANIUM GEOLOGY
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