A Calculation Method of Basement Maturity and Uranium Ore-forming Potential in Sedimentary Basins

A calculation method and maturity technology, applied in the field of uranium mines, can solve difficult problems and achieve the effects of good accuracy, strong operability and wide coverage

CN103675942BActive Publication Date: 2017-02-22BEIJING RES INST OF URANIUM GEOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-02-22

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Abstract

The invention belongs to the technical field of uranium mine, and particularly relates to a sedimentation basin basement maturity and uranium metallogenetic potentiality computing method, aiming to discriminate tectonic environment and earth crust maturity when igneous rocks in large sedimentation basin basement edge etching source area according to petrogeochemistry analytic data and to sort quality of uranium source conditions according to degree of maturity so as to provide conditions for evaluation of large sedimentation basin uranium metallogenetic potentiality. The computing method includes the steps of collecting samples of the igneous rocks in the basin edge etching source area at different geological ages, measuring ferrous oxide content and content of primary components and secondary components of the collected samples of igneous rocks, determining the rock series according to the component content measuring result and calculating thickness of earth crust correspondingly, and according to the calculated results, determining attribution of the rock series, deducing the tectonic environment and earth crust maturity when the igneous rocks form, and evaluating the sedimentation basin uranium metallogenetic potentiality.
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Description

technical field

[0001] The invention belongs to the field of uranium ore technology, and specifically relates to a calculation method for basement maturity of sedimentary basins and uranium ore-forming potential, which is suitable for discriminating the tectonic environment and crustal maturity when igneous rocks are formed in erosion source areas of large-scale sedimentary basins, and then evaluating Evaluation of uranium mineralization potential in the basin. Background technique

[0002] The research results of regional uranium mineralization law show that uranium ore has obvious adhesion to mature continental crust, uranium ore and mature continental crust are spatially dependent, and the tectonic setting before the basin-forming period has great influence on uranium mineralization in the later basin. Development has a certain control and influence. At present, studies on crustal maturity are mostly concentrated in orogenic belts. There are no mature technical methods f...

Examples

Embodiment Construction

[0021] A method for calculating the basement maturity and uranium mineralization potential of a sedimentary basin provided by the present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0022] like figure 1 As shown in , a calculation method for the basement maturity and uranium mineralization potential of a sedimentary basin includes the following steps:

[0023] Step S1: Collect igneous rock samples of different geological ages in the basin margin erosion source area

[0024] For example, samples of igneous rocks of different geological ages in the pre-mineral period (pre-basin period or basin sedimentation period but prior to sandstone uranium ore formation) were collected in the erosion source area around the basin. The samples should be fresh and unaltered, with a weight of about 200-300g.

[0025] Step S2: Determining the amount of ferrous oxide and the amount of primary and secondary components on the collected ...