Geological method for determining internal relation between pyrite and uranium ore in sandstone-type uranium ore
A pyrite and sandstone-type technology, applied in the field of sandstone-type uranium deposits, can solve problems such as constraints and lack of fine research on pyrite S isotopes, and achieve the effect of avoiding contamination
Pending Publication Date: 2021-02-19
BEIJING RES INST OF URANIUM GEOLOGY
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However, in the research process of the above-mentioned scholars, they often determine the origin of pyrite based on the mixed S isotope data of pyrites of different origins in sandstones, so as to explain its relationship with uranium mineralization, but there is a lack of information on the S isotopes of pyrites that are actually related to the formation of uranium. Fine research, thus restricting the research on the genesis of pyrite and its enrichment mechanism related to the formation of uranium ore
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[0020] A geological method for determining the internal relationship between pyrite and uranium minerals in sandstone-type uranium ore provided by the present invention will be described in detail below with reference to the accompanying drawings and examples.
[0021] A geological method for determining the intrinsic relationship between pyrite and uranium minerals in sandstone-type uranium ore, the method specifically comprises the following steps:
[0022] Step 1: Collection of borehole core samples and preparation of thin sections for sandstone-type uranium mines
[0023] The sample collection and thin-section formulation in the first step include collecting relatively hard block-like rich sandstone samples in sandstone-type uranium ore borehole cores. The number of sandstone and rich sandstone samples should be at least 10 or more (n≥10). The rich sandstone samples are ground into relatively thick thin slices of rich sandstone samples, and the thickness of rich sandstone ...
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Abstract
The invention belongs to the technical field of sandstone-type uranium ore, and particularly relates to a geological method for determining the internal relation between pyrite and uranium ore in sandstone-type uranium ore, which comprises the following steps of collecting a sample and formulating a slice, delineating a pyrite position related to uranium ore formation, determining the S isotope ofthe pyrite microcell related to uranium ore formation, and determining the internal relation between the pyrite and the uranium ore. According to the method, on the basis of finely finding out the spatial distribution relationship and boundary contact relationship between pyrite and uranium ore in sandstone-type uranium ore, the internal relation between pyrite and uranium ore is preliminarily determined, and then the cause of pyrite microcell S isotope close to the spatial relation between pyrite and uranium ore is directly determined; according to the method, the mixed dyeing effect of pyrite S isotopes of different causes is avoided, the pyrite formation and uranium enrichment mechanism in the sandstone-type uranium ore is clarified by combining the burying evolution process of the ore-containing target layer and the uranium mineralization process, and therefore the internal relation between pyrite and uranium ore is accurately determined.
Description
technical field [0001] The invention belongs to the technical field of sandstone-type uranium ore, and particularly relates to a geological method for determining the internal relationship between pyrite and uranium minerals in sandstone-type uranium ore. Background technique [0002] The enrichment of uranium in the oxidation-reduction transition zone in sandstone-type uranium deposits is generally considered to be the result of the reduction of U(VI) in groundwater to U(IV) to form uranium minerals and precipitation. The required reducing agent is mainly residual carbonization in the sandstone. Plant debris and sulfide, and uranium minerals are often seen around or replace pyrite in a ring-shaped structure. A large number of scholars have explained the ring structure of the above-mentioned pyrite and uranium minerals. Zhao Fengmin et al. (1986) thought through experimental research that it is S that reduces pyrite to U(Ⅵ) to form pitchblende. 2- ; Chen Zuyi et al. (2007) ...
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IPC IPC(8): G01N33/24G01N21/84G01N23/2251G09B23/40
CPCG01N33/24G01N21/84G01N23/2251G09B23/40
Inventor 丁波刘红旭邱林飞刘章月王文全张晓
Owner BEIJING RES INST OF URANIUM GEOLOGY
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