120 results about "Uranium mineralization" patented technology

The invention discloses a scientific deep drilling site selection method of a volcanic type uranium ore field. The method includes following steps: S01: recognizing an area uranium mineralization background, and screening an area with good uranium mineralization background as a primary selection area via the recognition of the area uranium mineralization background; S02: recognizing whether the overall structure of each volcanic basin in the primary selection area is good for mineralization, and recognizing at least one volcanic basin whose overall structure is good for mineralization in the primary selection area as a secondary selection area; S03: selecting abnormal positions in the secondary selection area by employing geophysical and geochemical methods; and S04: determining the deep drilling site according to the abnormal positions. According to the selection method, the range is gradually reduced from large to small, the deep drilling site is determined, the process is clear, the implementation is convenient, and the deep drilling construction of the deep drilling site determined by the method can strongly guarantee smooth operation of uranium ore exploration and research work.

The invention belongs to the technical field of uranium mineralization prediction, and particularly discloses a paleochannel type sandstone-type uranium ore deposit positioning method. The method includes the following steps of firstly, recognizing whether a uranium ore geological region to be positioned belongs to a uranium production paleochannel or not; secondly, if yes, delineating a uranium production paleochannel section in the region; thirdly, delineating a soil radon gas abnormal area of the uranium production paleochannel section delineated in the second step; fourthly, overlapping the uranium production paleochannel section delineated in the second step with the soil radon gas abnormal area delineated in the third step, thereby positioning a paleochannel type sandstone-type uranium mineralization favorable area, namely, the overlapping area of the uranium production paleochannel section and the soil radon gas abnormal area. The method has the advantages of being high in positioning accuracy, high in ore finding efficiency, rapid and low in cost.

The invention belongs to the technical field of sandstone-type uranium mineralization potential evaluation and collective geological prospecting in a basin, and specifically relates to a method for defining a favorable area of sandstone-type uranium mineralization under a strong construction background. The method comprises the following steps: 1, selecting a target layer in a work area; 2, calculating a lifting denudation quantity of the target layer; 3, constructing a preferable prediction theme; 4, predicting a weight assignment value of the theme; 5, calculating and predicting the unit ore-forming favorability; 6, defining and layering the favorable area of uranium mineralization. The method carries out the qualitative and quantitative evaluation of the most key construction parameters, highlights the contribution of a stratum denudation quantity caused by the construction effect to a uranium ore deposit, and preliminarily selects the evaluation region.

The present invention belongs to the uranium geology and resource evaluation technology field, in particular to a method of positioning the uranium deposits rapidly and effectively in a hot spot active region. The method comprises the following steps of 1 determining a hot spot active region range and a geological background; 2 screening and positioning a uranium mineralization favorable area in the hot spot active region; 3 screening and positioning a key section in a favorable metallogenic region; 4 determining a uranium mineralization environment in the key section; 5 integrating the metallogenic information and predicting the mineralization; 6 drilling and verifying in the key section. A uranium deposit and ore body positioning technology of the present invention is based on a brand new hot spot uranium mineralization theory and a prediction method and combines the geology, geophysics and geochemistry features to carry out the regional mineralization prediction and positioning on the basis of fully mining the previous data, and an operation method is simple and convenient and is high in accuracy, the prediction blindness is reduced, and the evaluation time is shortened.

The invention belongs to the field of geophysical exploration methods, and particularly relates to a comprehensive geophysical method for sedimentary basin uranium resource exploration. The method includes the following steps: in a sedimentary basin for uranium resource exploration, utilizing gravity data to delineate basement relief and determine a depression area; in the depression area, performing aeromagnetic measuring to determine favorable uranium mineralization regions; on the basis of the favorable uranium mineralization regions, carrying out three-dimensional seismic exploration, and delineating distribution characteristics, structural characteristics and inversion-series physical parameters of layers containing mine meshes. By the method, a technical means is provided for sedimentary basin uranium resource evaluation, economic risk of sedimentary basin uranium resource exploration is lowered, and exploration cycle is shortened.

The invention belongs to the technical field of uranium deposit prospecting, and provides a sedimentary basin oil and gas strong reduction action zone sandstone type uranium deposit prospecting model establishing method which fully integrates the oil and gas reduction action, interlayer oxidation, the plane of unconformity, fracturing, sand bodies and other geological actions and geological units, discloses all the geological actions and the relationship thereof and determines a prospecting target for the sedimentary basin oil and gas strong reduction action zone. The method comprises the following steps that step one, a target layer is determined; step two, the oil and gas reduction action distribution range is delimitated; step three, time of the plane of unconformity is determined; step four, time Th of the oil and gas reduction action is determined; step five, the uranium mineralization type is determined; and step six, the prospecting model is established.

The invention belongs to the technical field of sandstone-type uranium mine mineralization prediction, and relates to a sandstone-type uranium mine favorable mineralization lithofacies belt positioning method. The method includes the following steps that: step 1, regional geological data are collected, and a sandstone-type uranium mine uranium-prospecting key area and target horizon are determined; step 2, the sedimentary facies type and spatial distribution characteristics of the key area and the target horizon in the step 1 are sorted; and step 3, the sedimentary facies belt of favorable uranium mineralization is delineated qualitatively and quantitatively on the basis of a uranium-bearing stratum structure, sand body physical properties, lithological combinations, paleoclimate, oxidizing zone developmental conditions and uranium-bearing geological conditions.

The invention belongs to the field of sandstone-type uranium ore exploration, and specifically discloses an outlining method for an in-situ leaching sandstone-type uranium-bearing basin favorable mineralization section. The method comprises the steps: determining a research area, and selecting a target layer; collecting a land surface sample of a bottom plate of a basin edge target layer, a drilled coal stone sample or a carbon mudstone sample; collecting sandstone samples of the above samples at the same layer; carrying out the vitrinite reflectance measurement of the collected coal stone sample or the collected carbon mudstone sample, and calculating the maximum burial depth of an ore-containing target layer; selecting apatite minerals from the collected mudstone sample, carrying out the fission-track dating of apatite, and carrying out the inversion of the relation between temperature and time in construction evolution; verifying whether the above inversion result is matched with the actual condition or not: extracting the measurement result if the above inversion result is matched with the actual condition, or else checking whether the sampling is standard or not; drawing an erosion thickness contour map in the research area according to an erosion thickness calculation result, carrying out the research of restriction of construction uplift erosion on uranium mineralization, and outlining a favorable mineralization section. The method is clear in sampling object, is clear in analysis flow, and is simple in operation.

The invention belongs to the technical field of uranium geology research, and specifically relates to a method of selecting a target area of a sandstone-type uranium deposit based on mineralization favorability. The method includes the following steps: S1, determining a favorable environment for uranium mineralization; S2, determining uranium mineralization prediction factors; S3, assigning valuesto the uranium mineralization prediction factors; S4, calculating the value of uranium mineralization favorability; and S5, delineating a mineralization target area, and evaluating the potential of uranium mineralization. The steps of the method are irreversible. The potential of uranium mineralization in a region can be evaluated efficiently, quickly and objectively.

The invention belongs to the field of uranium resource exploration, in particular discloses a low background earth atmosphere exploration method suitable for uranium resource exploration, which comprises the following steps: soaking polyester film explorers in deionized water in a ultrasonic cleaner, and using ultrasonic waves and the deionized water to clean the polyester film explorers for at least 90 minutes; after drying the polyester film explorers, manufacturing the dried polyester film explorers into earth atmosphere explorers; setting measuring lines at equal intervals, wherein a plurality of points are formed on each measuring line; excavating a deep pit below each measuring point, and putting the explorers which are suspended with thin lines at the bottoms of the pits; embeddingthe earth atmosphere explorers for at least 30 days; when the preset time is due, taking out the earth atmosphere explorer corresponding to each measuring point; after preprocessing the earth atmosphere explorers by ashing and acid dissolution, using a plasma mass spectrometer to measure uranium in samples; and carrying out normalizing the weights of the polyester film earth atmosphere explorers to obtain nano-grade uranium content. The method of the invention obtains nano-grade uranium particle information with a high signal-to-noise ratio caused by concealed uranium mineralization in uraniumresource exploration.

The invention relates to a detection method of nano-scale uranium particles based on soil water in vapor phase and vaporous water collectors. The method comprises the following steps: arranging five or more than five equidistant measuring lines in a prospect area of a sandstone type uranium mine, arranging a plurality of points with the same point spacing and line spacing, and burying the vaporous water collectors into small pits with the depth of 60-70cm under each point; taking out the vaporous water collectors after being buried for at least10 days; measuring the uranium concentration of condensation water collected by the vaporous water collectors by a plasma mass spectrometer; finally, drawing a chorogram of the uranium concentrations of the soil vaporous water at the uranium mine by a multi-fractal interpolation method, determining a lower limit of uranium anomaly by a statistical analysis method, and inferring a spatial position of uranium mineralization. The method can help effectively detect nano-scale uranium mineralization information originating from a deep part. The vaporous water collectors have simple structure and easy manufacture, and can conveniently collect the vaporous water originating from the deep part.

The invention belongs to the field of an integrated geophysical exploration method and specifically relates to a sandstone type uranium mine integrated geophysical exploration method. The method comprises the following steps: 1, determining a basin depression and uplift zones; 2, dividing a rock boundary so as to determine a favorable uranium mineralization section; and 3, carrying out electromagnetic depth detection, knowing underground geoelectric structure features, and determining sand body spatial distribution and forms facilitating uranium mineralization. By use of such a technical scheme, economic and high-efficiency integrated geophysical exploration means is provided for a basin sandstone type uranium mineralization prospecting region, embedded depth and distribution rules of an underground destination-layers sand body are effectively evaluated, and the method has great realistic significance for geological prospecting work.

The invention relates to a transitory activated carbon adsorption radon sampling device and a method for exploring transitory activated carbon adsorption radon. The transitory activated carbon adsorption radon sampling device comprises a soil gas collector, an electric time suction pump and an activated carbon absorber, wherein the air inlet of the electric time suction pump is connected with an air outlet hole of the soil gas collector, and the air outlet of the electric time suction pump is connected with a duct of the air inlet of the activated carbon absorber. The method for exploring transitory activated carbon adsorption radon comprises that: measurement is carried out three days after on-site data acquisition so as to avoid the influence of thoron effectively; and a multi-fractal spatial interpolation is adopted to achieve excellent effect in maintaining and enhancing local abnormal information and contribute to the highlight of local weal abnormal information on blind uranium mineralization. The device can quickly collect free radon in soil and acquire the abnormal information on radon from a deep area, and contributes to the prediction and evaluation of a blind uranium resource.

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.

The invention belongs to the field of uranium mineralization theories and prospecting technology methods, and particularly relates to a comprehensive method for identifying a source of a sandstone-type uranium mineralization target stratum. The comprehensive method comprises the following steps that 1, a sandstone sample of the target stratum is collected; 2, the composition and content of heavy minerals in the sample are identified; the collected sandstone sample is crushed to 80 mesh, and the heavy minerals in the sample are selected by levigating, and the composition of the heavy minerals and the relative content of various heavy minerals are identified under binoculars; 3, elemental composition in the sample is detected; part of the sample is pulverized to 200 mesh, and an ICP-MS traceelement analyzer and an X fluorescence spectrometer are used for correspondingly testing the content of trace elements and major elements in the sample; 4, detrital zircon U-Pb isotope test is carried out; the detrital zircon is separated from the heavy minerals, and laser ablation plasma mass spectrometry LA-ICP-MS is used for testing the U-Pb isotope composition of zircon in the detrital zircon; and after U-Pb isotope data are obtained, a Isoplot 4.15 software is used for processing, and an age harmonic map is fitted; and 5,source area discrimination is carried out.

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.

The invention relates to a method for finding uranium ore in a large basin in a structurally activated area, which comprises the following steps in sequence: 1. Collecting remote sensing data of the research area through satellites; 2. Performing remote sensing image processing on the remote sensing data to obtain remote sensing thematic images; Interpret the geological structure of the remote sensing thematic images to find out the fault block structures enclosed by faults; 4. According to the texture structure and the exposure and deposition of strata on the fault block structures enclosed by faults, judge the fault uplift and fault block structure. 5. Obtain the gravity data, aeromagnetic data, airborne data and geological maps on each fault uplift; 6. Carry out data integration to find out the uranium source conditions, uranium migration conditions and uranium precipitation enrichment at the same time. Seventh, look for granite-type, volcanic rock-type or carbon-silicon mudstone-type uranium mineralization belts on the fault-uplift; look for sandstone-type uranium mineralization belts on the edge of the fault-uplift. The invention narrows the scope of regional ore prospecting, expands the target types of ore prospecting, and improves the accuracy of ore prospecting.

The invention belongs to the field of the uranium mineralization theory and prospecting technologies and specifically relates to a method for establishing a mineralogical mark of an oxidized zone of sandstone-type uranium ore. The method comprises 1: acquiring a sample through a system, 2: preparing a polished thin slice, 3: observing the degree of mineral alteration and 4: establishing mineralogical markers in all oxidized zones. The method refers to the color standard but also provides a microscopic mineralogical marker, and provides a basis for the accurate banding of interlayer oxidized zones.

The invention belongs to the technical field of uranium exploration and discloses a method for identifying deep uranium mineralization information in particular. The method for identifying deep uranium mineralization information comprises the following steps: (1) determining the measuring position in the measuring area; (2) taking the soil sample from the measuring position determined in the above step (1); (3) measuring the gamma spectrum of uranium content in the pit after taking the soil sample in the above step (2); (4) drying, grinding, and sieving the retrieved soil sample; (5) drying the sieved soil samples in the above steps (4); (6) extracting component uranium from the soil sample after drying by step (5) by using a medicament; (7) determining the component uranium extracted in the above steps (6); (8) making a plane contour map; (9) delineating abnormal areas; (10) according to energy spectrum uranium, component uranium, component uranium/energy spectrum abnormal uranium ratio, identifying deep uranium mineralization information. The method for identifying deep uranium mineralization information can greatly improve work efficiency and shorten the prospecting period.

The invention belongs to the technical field of uranium resource exploration, and discloses a granite-type uranium mine deep mineralization information extracting method. The method includes the following steps that: the geological units of a work area are defined according to different lithological features or strata; soil sampling is performed in the geological units; clay adsorbed state uraniumcontent and total uranium amount of soil samples in the geological units are analyzed; the ratio R of the clay adsorbed state uranium content to total uranium amount of the soil samples in the geological units is calculated according to the clay adsorbed state uranium content and total uranium amount of the soil samples; the abnormal lower limit C of the R value of the samples of the geological units is calculated; the ratio F of the R value of the samples of the geological units to the abnormal lower limit C is solved according to the R value and the abnormal lower limit C; with a constant 1adopted as the abnormal lower limit, the abnormal area of the F value of the work area is delimited, and a prospecting target area is determined for deep uranium mine exploration, and uranium mine deep mineralization information extraction is completed. With the method adopted, the interference of near-surface information can be greatly reduced, and deep uranium mineralization information can beeffectively extracted.

The invention belongs to the field of sandstone-type uranium ore favorable zone prediction technology research, and particularly relates to a sandstone-type uranium ore early exploration rapid selection method. The method comprises the steps of 1, collecting and arranging research results and regional geological data of a working area, and defining a basin edge uranium-enriched basement and a rockmass distribution range; 2, determining stratum characteristics and uranium-bearing property of the working area, and determining a main ore-bearing target stratum; carrying out favorable sedimentaryfacies belt distribution characteristic research, and accurately positioning the spatial range of favorable mineralization lithology-lithofacies belt; 3, defining a favorable uranium mineralization age, defining ancient landform characteristics of a favorable mineralization period of an ore-bearing target stratum, and defining the distribution position of a sandstone type confluence channel in the working area; and 4, quickly selecting a favorable exploration area.

The invention belongs to the technical field of uranium mine exploration, and particularly relates to a sedimentary basin edge strong oil and gas reduction area sandstone type uranium mine distant view evaluation method, which comprises the steps of 1, establishing a stratum table; 2, screening a uranium mineralization target layer; 3, delineating a sandstone-type uranium mine distant view evaluation area range; 4, determining a sandstone type uranium mineralization period; 5, determining the time of first large-scale oil gas spill in the sandstone-type uranium mine distant view evaluation area range; 6, compiling a sedimentary facies diagram of a uranium mineralization target layer in the sandstone-type uranium mine distant view evaluation area; and 7, establishing a sandstone-type uranium mine distant view evaluation model of the basin edge strong oil and gas reduction area of the sedimentary basin. According to the method, factors such as stratums, unconformity surfaces, oil-gas reduction, paleooxidation and sedimentary facies are integrated, the sandstone-type uranium ore distant view of the basin edge strong oil-gas reduction area of the sedimentary basin can be quantitativelyevaluated, and evaluation parameters are provided for sandstone-type uranium ore exploration of the area.

The invention belongs to the technical field of sandstone type uranium mineralization potential evaluation and comprehensive prospecting in the basin, and specifically discloses a method for rapidly delineating the position of a paleo-interlayer oxidation front line in an oil gas covering area. The method includes (1) determining the paleo layer working area of the oil gas covering area and selecting a destination layer; (2) selecting n uranium deposits that are similar to the working area in the oil gas covering area in the previous step (1); (3) determining the similarity Si between the n uranium deposits and the working area in step (2); (4) determining the front line development rate Vi for the n uranium deposits in step (2); and (5) delineating the paleo oxidation front line of the working area. According to the method, the paleo-interlayer oxidation front line development position can be quickly and efficiently delineated, the prospecting efficiency is improved, and the prospecting cost is saved.