Method for determining mineralization age of sandstone-type uranium ore in basin

A technology for sandstone-type uranium deposits, applied in the field of determining the metallogenic age of sandstone-type uranium deposits in sedimentary basins

Active Publication Date: 2019-03-29
BEIJING RES INST OF URANIUM GEOLOGY
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Problems solved by technology

However, the cuttings of ore sandstone often contain various primary uranium-bearing minerals, such as zircon, monazite, and titanite, etc. These components have a certain impact on the results of whole-rock U-Pb dating.

Method used

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  • Method for determining mineralization age of sandstone-type uranium ore in basin

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0023] like figure 1 As shown, the present invention provides a method for determining the ore-forming age of sandstone-type uranium deposits in basins. The method specifically includes the following steps:

[0024] Step (1) Select the target layer of uranium deposit or uranium mineralization point, and determine the stratum age of the ore-bearing formation as t 0 ;Specific steps are as follows:

[0025] (1.1) Select the main sandstone-type uranium deposits or uranium mineralization points in the working area as the research object.

[0026] (1.2) Take the main sandstone-type uranium deposits or ore-bearing formations of uranium mineralization points in the working area as the research target layer, and determine its stratigraphic age as t 0 .

[0027] Step (2) collect sandstone ore samples in the working area where the sandstone-type uran...

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Abstract

The invention discloses a method for determining a mineralization age of a sandstone-type uranium ore in a basin, belonging to the technical field of sandstone-type uranium ore in the basin. The method for determining the mineralization age of the sandstone-type uranium ore in the basin comprises the following steps: step (1), selecting a deposit and a target layer to determine a stratigraphic aget0 of an ore-bearing construction; step (2), collecting an ore sample; step (3), performing polished thin section grinding on the ore samples; step (4), performing particle size statistics on the polished thin section; step (5), breaking the samples according to the particle size level classification result, and dividing the samples according to the particle levels; step (6), performing total rock U-Pb isotopic dating on the classified samples with different particle size levels, and performing isochron age calculation meanwhile; and step (7), determining the uranium mineralization age according to the isochron age and the stratigraphic age t0. The method for determining the mineralization age of the sandstone-type uranium ore in the basin disclosed by the invention can accurately determine the formation age of the basin sandstone-type uranium ore, and eliminate the influence of the uranium-containing debris particles in the sandstone to the greatest extent, thereby maximally approaching the true formation age of the uranium ore.

Description

technical field [0001] The invention belongs to the technical field of sandstone-type uranium deposits in basins, and in particular relates to a method for determining the ore-forming age of sandstone-type uranium deposits in sedimentary basins. Background technique [0002] The precise determination of metallogenic age is a golden key to understand the metallogenic regularity of ore deposits and predict the prospecting target area. However, the metallogenic chronology of sandstone-type uranium deposits in the basin is currently facing enormous difficulties and challenges, and it is a world problem that needs to be solved urgently. This is mainly because the ore-forming system of this type of deposit is completely open, and the uranium ore is subjected to continuous destruction and transformation. At the same time, the grade of sandstone-type uranium deposits is usually low (industrial grade 0.01%), and the size of new (secondary) uranium minerals is generally only 0.n—n (μ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/00
CPCG01N23/00
Inventor 黄少华秦明宽李娟东艳刘章月何中波
Owner BEIJING RES INST OF URANIUM GEOLOGY
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