A METHOD FOR DETERMINING ORE-FORMING AGE OF SANDSTONE-TYPE URANIUM DEPOSIT 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: 2021-04-13
BEIJING RES INST OF URANIUM GEOLOGY
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  • Abstract
  • Description
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  • Application Information

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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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  • A METHOD FOR DETERMINING ORE-FORMING AGE OF SANDSTONE-TYPE URANIUM DEPOSIT IN BASIN

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Embodiment Construction

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

[0023] like figure 1 As shown, the present invention provides a method for determining the mineralization age of a sandstone-type uranium deposit in a basin, the method specifically includes the following steps:

[0024] Step (1) Select the target layer of uranium deposit or uranium mineralization point, and determine the 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 as the research objects in the working area.

[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) collecting sandstone ore samples in the working area where the sandstone-type urani...

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Abstract

The invention belongs to the technical method field of sandstone-type uranium deposits in basins, and specifically discloses a method for determining the ore-forming age of sandstone-type uranium deposits in basins. Formation age t 0 ; Step (2) ore sample collection; Step (3) light thin slice grinding of ore sample; Step (4) carry out particle size statistics on light thin slice; Step (5) break the sample according to the particle size classification result, and the sample is divided according to the particle level; Step (6) performs whole-rock U-Pb isotope dating on the classified samples of different granularity levels, and calculates the isochron age in parallel; step (7) according to the isochron age and stratigraphic age t 0 , to determine the metallogenic age of uranium ore. The method of the invention can accurately determine the formation age of the sandstone-type uranium deposit in the basin, eliminate the influence of uranium-containing clastic particles in the sandstone to the greatest extent, and then approach the true formation age of the uranium deposit to the greatest extent.

Description

technical field [0001] The invention belongs to the technical field of sandstone-type uranium deposits in basins, and particularly relates to a method for determining the metallogenic age of sandstone-type uranium deposits in sedimentary basins. Background technique [0002] Precise determination of metallogenic age is a golden key for understanding the metallogenic regularity of the deposit and predicting the prospecting target area. However, the mineralogy of sandstone-type uranium deposits in the basin is currently facing huge difficulties and challenges, and it is a world problem that needs to be solved urgently. This is mainly due to the fact that the metallogenic system of this type of deposit is completely open, and the uranium ore has been continuously destroyed and transformed. At the same time, the grade of sandstone-type uranium ore is usually low (industrial grade 0.01%), the size of new (secondary) uranium minerals is generally only 0.n-n (μm), and it contains ...

Claims

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Application Information

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Patent Type & Authority Patents(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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