CN109212625A - A kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method - Google Patents
A kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method Download PDFInfo
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Abstract
The invention belongs to sandstone-type uranium deposit paleohrdrodynamic condition analysis and synthesis electric powder predictions in Meso-Cenozoic basins, and in particular to a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method.The method of the present invention includes the following steps: step S1 divides the palaeohydrogeology phase time；Step S2 statistics drilling mud stone and sandstone thickness；Step S3 calculates formation compaction thickness；Step S4 calculates ancient water seepage action intensity；Step S5 calculates ancient water leaking-in action intensity；Step S6 calculates water-bearing layer fossil ground water alternate intensity.Method of the invention simplifies drilling sandstone and mud stone thickness statistical method, eliminate the influence for looking for mine target zone sandstone distribution area, thickness and porosity to change to ancient underground alternate intensity, quantitative, reliable palaeohydrogeology foundation is provided for Formation of Sandstone-type Uranium Deposits prediction, the quantitative forecast suitable for northern China Meso-Cenozoic basins uranium ore and other Sedimentary Ore Deposits.
Description
Technical field
The invention belongs to sandstone-type uranium deposit paleohrdrodynamic condition analysis and synthesis Predicting Techniques in Meso-Cenozoic basins to lead
A kind of domain, and in particular to sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method.
Background technique
Sandstone-type uranium mineralization with respect is a kind of epigenetic water into uranium deposit, and Groundwater dynamic condition is control interlayer oxidized zone development model
One of enclose with the important factor in order of scale.China's Meso-Cenozoic basins sandstone-type uranium mineralization with respect is mostly ancient mine, and ore -forming age is main
Concentrate on J3-K1、K2, N-Q time equivalence, there are more phase property, and the low-grade ore age is compared with early, high-grade ore is later, early stage uranium ore (change)
The body transformation effect strong by the later period.
Uplift stage, large-scale basin receive Atmospheric precipitation in pelvic floor hernia, develop infitration type underground water；Stratum settlement
Stage, Basin Central are developed exudative type underground water by compaction；During Basin Evolution, due to structural environment, basin
The influence of the factors such as height difference, different times exudative type underground water and infitration type underground water are alternately to develop, only in ancient hydrodynamic(al)
In the metastable situation of power condition, just it is unlikely to destroy existing uranium deposit, and rich product can be transformed again to mineral deposit.
Sandstone-type uranium deposit paleohrdrodynamic condition analysis and synthesis electric powder prediction, needs to sand in Meso-Cenozoic basins
Lithotype uranium ore fossil ground water alternate intensity quantitative calculation method is studied, to evaluate Mesozoic & Cenozoic sediment basins ancient paddy soil item
Part provides reliable judgment basis for sandstone-type uranium mineralization with respect prediction.
Summary of the invention
The technical problem to be solved in the invention are as follows: propose that a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitatively calculates
Method is mentioned with rapidly and accurately evaluating Mesozoic & Cenozoic sediment basins paleohrdrodynamic condition for the positioning of sedimentary basin sandstone-type uranium mineralization with respect
For ancient hydrodynamics foundation.
It is described that technical scheme is as follows:
A kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method, it is characterised in that: the following steps are included: step
Rapid S1 divides the palaeohydrogeology phase time；Step S2 statistics drilling mud stone and sandstone thickness；Step S3 calculates formation compaction thickness；Step
Rapid S4 calculates ancient water seepage action intensity；Step S5 calculates ancient water leaking-in action intensity；Step S6 calculates water-bearing layer fossil ground water
Alternate intensity.
As a preferred solution: according to the basin-mountain frame work phase time, and combining sandstone-type uranium mineralization with respect Main Metallogenic mesh in step S1
Layer, divide palaeohydrogeology phase time.
As a preferred solution: the mud stone includes silty and coal in step S2；The sandstone include gritstone,
Middle sandstone, packsand and siltstone.
As a preferred solution: calculating formation compaction thickness using following formula in step S3:
δ H=H1-HIt is existing=H1(m1-mIt is existing)/(1-mIt is existing)
In formula,
δ H is formation compaction thickness；
HIt is existingTo look for mine target zone in evaluation phase formation thickness；
H1To look for mine target zone formation thickness before the evaluation phase；
mIt is existingTo look for mine target zone in evaluation phase stratum mudstone porosity；
m1To look for mine target zone in evaluation phase preceding stratum mudstone porosity.
In step S3, representational buried depth and porosity standard variation curve can be chosen, is peeled back to using inverting
Technology successively calculates and looks for mine target zone and its overlying strata in the mudstone porosity in a certain period.
As a preferred solution: calculating ancient water seepage action intensity using following formula in step S4:
IExudation=(Sn×δH)/(Ss×Hs×ms)
In formula,
IExudationFor ancient water seepage action intensity；
SnTo look for mine target zone mud stone distribution area before the evaluation phase；
SsTo look for sandstone aquifer distribution area in mine target zone；
HsTo look for sandstone aquifer thickness in mine target zone；
msTo evaluate phase sandstone porosity.
In step S4, in same water-bearing rock group, Sn=Ss。
As a preferred solution: calculating ancient water leaking-in action intensity using following formula in step S5:
IIt penetrates into=F × P × a × t/ (Ss×Hs×ms)
In formula,
IIt penetrates intoFor ancient water leaking-in action intensity；
F is to look for mine target zone basin edge outcrop area；
P is annual rainfall；
A is precipitation recharge coefficient；
T is the penetration stage duration.
In step S5, mine target zone basin edge outcrop area F and sandstone aquifer distribution area S are looked forsIt is measured on geologic map
It determines；Annual rainfall P is determined with reference to the precipitation under the conditions of Different climate now using analogy method according to geologic climate data；Drop
Rain infiltrated water a comprehensively considers stratum relative elevation, the seepage of water of sandstone and earth's surface network of rivers developmental state and determines；Penetration stage is held
Continuous time t is determined according to absolute geochronology.
As a preferred solution: calculating water-bearing layer fossil ground water alternate intensity using following formula in step S6:
I=IIt penetrates into/IExudation==(F × P × a × t)/(Sn×δH)
In formula,
I is water-bearing layer fossil ground water alternate intensity.
The invention has the benefit that
(1) a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method of the invention, from being conducive to sandrock-type
The angle of Uranium Deposits comprehensively considers palaeohydrogeology phase time, drilling mud stone and sandstone thickness, formation compaction thickness, ancient exudation
The geologic(al) factors such as water action intensity, ancient water leaking-in action intensity, water-bearing layer fossil ground water alternate intensity, establish one kind and are suitable for
The method flow that Meso-Cenozoic basins difference geologic(al) period fossil ground water alternate intensity quantitatively calculates, can rapidly and accurately evaluate
Mesozoic & Cenozoic sediment basins paleohrdrodynamic condition provides ancient hydrodynamics foundation for the positioning of sedimentary basin sandstone-type uranium mineralization with respect；
(2) a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method of the invention simplifies in calculating process
Sandstone and mud stone thickness statistical method make mud stone squeezing THICKNESS CALCULATION have feasibility；
(3) a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method of the invention, according to geologic climate and Gu
Geomorphic feature calculates water leaking-in action intensity, and then calculates sandstone-type uranium and look for mine target zone fossil ground water alternate intensity, calculates
Method strong operability；
(4) a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method of the invention, eliminates target zone sand
Rock distribution area, thickness and porosity change the influence to ancient paddy soil criterion, and it is fixed to provide for Formation of Sandstone-type Uranium Deposits prediction
Amount, reliable palaeohydrogeology foundation；
(5) a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method of the invention, the fossil ground water of calculating
Alternate intensity is accurate and reliable, the quantitative forecast suitable for northern China Meso-Cenozoic basins uranium ore and other Sedimentary Ore Deposits.
Detailed description of the invention
Fig. 1 is a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method flow chart of the invention；
Fig. 2 is drilling mud stone and sandstone statistical chart.
Specific embodiment
A kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity of the invention is quantitatively calculated with reference to the accompanying drawings and examples
Method is described in detail.
As shown in Figure 1, a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method of the invention, including it is following
Step:
Step S1 divides the palaeohydrogeology phase time
In workspace according to the basin-mountain frame work phase time, and sandstone-type uranium mineralization with respect Main Metallogenic target zone is combined to determine the ancient hydrology
Geologic age time.Specifically, the main foundation for dividing the hydrogeological phase is the expansion and contraction, heavy of structural evolution, water storage basin
Long-pending and eluviation replacement, and needed for the technology of sandstone-type uranium mineralization with respect prediction and evaluation, the palaeohydrogeology phase time is divided, each
The Paleo-hydrogeological Condition should make a marked difference in the hydrogeological phase.Northern China Meso-Cenozoic basins are by Yanshanian movement
The influence of (four phases time) and Himalaya movement (two phases time), and divide the main time node of palaeohydrogeology phase.With
Palaeohydrogeology cascade correlation can also be fine to group according to the needs that sandstone-type uranium mineralization with respect is evaluated by the raising of basin research degree
Group.
Step S2 statistics drilling mud stone and sandstone thickness
The thickness of drilling sandstone and mud stone in the palaeohydrogeology phase time that this step statistic procedure S1 delimited.Sedimentary basin
In deposit be mainly made of numerous not uniform thickness, interlaced sandstone and mud stone, aqueous series of rocks are classified as by this calculation method
Mud stone and sandstone two major classes.Gritstone, middle sandstone, packsand and siltstone are little in the variation of compacting process porosity, unite
It is calculated as sandstone；Silty and coal a large amount of connate water exudations, formation thickness in compacting process are obviously reduced, and statistics is mud
Rock.As shown in Fig. 2, thickness is equal to all entirely looking for mine target zone to be converted into only one sandstone aquifer on section
The summation of sandstone thickness, and bury in section center, sandstone aquifer is all mud stone up and down, respective cumulative thickness is counted,
To restore the formation thickness in metallogenic period.
Step S3 calculates formation compaction thickness
It buries in compacting process, the skeleton thickness volume on stratum is constant always, and the reduction of formation thickness is due to burying depth
The increase of degree causes mudstone porosity to reduce.The porosity of mud stone and sandstone and the correlation of depth have phase in sedimentary basin
As variation tendency, can according to sedimentary porosity change calculate stratum compacted thickness.Formation thickness and porosity exist
Relationship shown in following formula:
HIt is existing(1-mIt is existing)=H1(1-m1)
In formula,
HIt is existingTo look for mine target zone in evaluation phase formation thickness；
H1To look for mine target zone formation thickness before the evaluation phase；
mIt is existingTo look for mine target zone in evaluation phase stratum mudstone porosity；
m1To look for mine target zone in evaluation phase preceding stratum mudstone porosity.
And then formation compaction thickness δ H is calculated using following formula:
δ H=H1-HIt is existing=H1(m1-mIt is existing)/(1-mIt is existing)。
Representational buried depth and porosity standard variation curve are chosen, is peeled back to technology using inverting, is successively calculated
It looks for mine target zone and its overlying strata in the mudstone porosity in a certain period, and then calculates formation compaction thickness.
Step S4 calculates ancient water seepage action intensity
The water seepage intensity of a certain palaeohydrogeology phase, mainly by mud stone, the number of water seepage is determined in compacting process
, therefore, ancient water seepage action intensity IExudationMud stone squeezes the ratio between water volume and reservoir sandstone volume i.e. under compaction, adopts
It is calculated with following formula:
IExudation=(Sn×δH)/(Ss×Hs×ms)
In formula,
SnTo look for mine target zone mud stone distribution area before the evaluation phase；
SsTo look for sandstone aquifer distribution area in mine target zone；
HsTo look for sandstone aquifer thickness in mine target zone；
msTo evaluate phase sandstone porosity.
Mudstone stratum compacted thickness δ H is calculated according to step S3, due to same water-bearing rock group Sn=Ss, ancient water seepage effect is by force
Degree can be pressed: IExudation=δ H/ (Hs×ms) calculate.It can be seen that water seepage action intensity is not evaluated the shadow of target zone distribution area
It rings, it is only related to mudstone compacting thickness and sandstone pores.
Step S5 calculates ancient water leaking-in action intensity
A certain period Gu water leaking-in action intensity depends on precipitation, basin edge stratum outcrop area and precipitation recharge coefficient,
Ancient water leaking-in action intensity IIt penetrates intoThat is the ratio between basin edge Atmospheric precipitation source underground water volume and reservoir sandstone volume.Using following
Formula calculates:
IIt penetrates into=F × P × a × t/ (Ss×Hs×ms)
In formula,
F is to look for mine target zone basin edge outcrop area；
P is annual rainfall；
A is precipitation recharge coefficient；
T is the penetration stage duration.
Look for mine target zone basin edge outcrop area F and sandstone aquifer distribution area SsIt measures and determines on geologic map；Year drops
Rainfall P is determined with reference to the precipitation under the conditions of Different climate now using analogy method according to geologic climate data；Rainfall infiltration system
Number a comprehensively considers stratum relative elevation, the seepage of water of sandstone and earth's surface network of rivers developmental state and determines；Penetration stage duration t
It is determined according to absolute geochronology.
Step S6 calculates water-bearing layer fossil ground water alternate intensity
Water-bearing layer fossil ground water alternate intensity refers to infitration type underground water to the alternate frequency of exudative type underground water.Due to containing
Water layer is sandstone, mud stone composition, and by the complex geologic body of construction and Fracture Control, fossil ground water alternate intensity (alternate frequency)
Infitration type underground water in true water-bearing layer is not represented to the exchange times of exudative type underground water, but is used to evaluate water-bearing layer Gu
The quantitative target of dynamic condition provides quantitative basis for the prediction of basin sandstone-type uranium mineralization with respect.Water-bearing layer fossil ground water alternate intensity I by
Ancient water leaking-in action intensity IIt penetrates into/ Gu water seepage action intensity IExudationIt is calculated, is shown below:
I=IIt penetrates into/IExudation==(F × P × a × t)/(Sn×δH)
Water-bearing layer fossil ground water alternate intensity I is determined by basin edge Atmospheric precipitation infiltration capacity and mud stone squeezing water, with evaluation
Target zone sandstone thickness and porosity variation are unrelated.
It, can be with recently in order to evaluate lifting phase fossil ground water alternate intensity due to the water seepage agensis of uplift phase
One period Gu exudation water alternate intensity substitution calculates.
For water-bearing layer fossil ground water alternate intensity I if it is less than 10, water-bearing layer mainly inherits the exudation origin cause of formation of previous stage
Water has reproducibility more；Equal to 10~100, water-bearing layer is exactly the mixing of old exudation origin cause of formation water and young infiltration origin cause of formation water
Object；When greater than 100, the underground water of the origin cause of formation is mainly penetrated into.
The index that water-bearing layer fossil ground water alternate intensity is predicted as Formation of Sandstone-type Uranium Deposits uses data quasi-
Really, calculating process is feasible, calculated result is effective, provides reliable judgment basis for sandstone-type uranium mineralization with respect prediction, or deposition
The other Mineral assessment predictions in basin provide foundation.
Embodiment
Junggar Basin, Xinjiang, china east card nurse this specially area quantitatively calculates sandstone-type uranium mineralization with respect fossil ground water alternate intensity example.
Step S1
It is morning-Middle Jurassic series that Junggar Basin, Xinjiang, china, which mainly looks for mine target zone, is commented according to structural evolution and sandstone-type uranium mineralization with respect
The Junggar Basin, Xinjiang, china east palaeohydrogeology phase time is divided into J by the needs of valence1b、J1s、J2x、J2t、J3、K1、K2、E、N
Nine hydrogeological phases, according to Prospecting Sandstone-type Uranium Deposits needs, J2X and J2T is as key evaluation layer position.
Step S2
The drilling that In The Eastern Junggar Basin exposes target zone is collected, the thickness of each drilling different layers position sandstone and mud stone is counted
Degree, statistical data are as shown in table 1.
The drilling different layers position sandstone of table 1 and mud stone thickness statistical form (m)
Note :-lacuna
Step S3
To calculate formation compaction thickness δ H, using the principle of deposition compacting and porosity variation, skill is peeled back to using inverting
Art is layered status from current basin, successively peels off by the palaeohydrogeology phase time, until all having shelled.In practical work
Low~middle Jurassic water-bearing layer is calculated in different times compacted thickness using Basinmod software in work, and calculated result is as shown in table 2.
2 human relations of table, 6 well morning Middle Jurassic series water-bearing layer different times mudstone compacting thickness table (m)
Step S4
Due to same water-bearing rock group different times Gu water seepage action intensity IExudationAccording to mudstone compacting thickness and sandstone pores
The ratio between calculate.In The Eastern Junggar Basin Wu Lungu down warping region area low~middle Jurassic sandstone buries thickness and is generally less than 2000m, not
Apparent cementation occurs, sandstone porosity is held essentially constant in compacting process, due to when counting sandstone thickness, slightly
It is sandstone that sandstone, middle sandstone, packsand and siltstone, which all count, and petrosal foramen porosity is calculated according to using 35%.Lower sieve dwarf in 6 well of human relations
System different times Gu exudation water alternate intensity calculated result is shown in Table 3.
3 human relations of table, 6 well low~middle Jurassic different times Gu water seepage action intensity computational chart
Step S5
In The Eastern Junggar Basin is located in Wu Lungu down warping region, north side since tectonic subsidence, low~middle Jurassic stratum do not have exposure,
Water leaking-in supply is not received.The distribution of southern carat beauty mountain range granite large area, low~middle Jurassic water-bearing layer is in the big face of basin edge
Product exposure, receives the supply of Atmospheric precipitation and mountain area crevice water for a long time, has good uranium source and recharge of ground water condition,
It is into the favo(u)rable target layer position of mine.
The distribution area S of sandstonesWith look for mine target zone basin edge outcrop area F according to ten thousand geologic map of 1:25 draw a circle to approve (table
4), annual rainfall P determines (table 5) using analogy method according to geologic climate data；Precipitation recharge coefficient a takes 0.12, sandstone porosity
It is calculated according to using 35%.Ancient water leaking-in action intensity calculated result is shown in Table 6.
4 In The Eastern Junggar Basin Ka Musi of table specially area's low~middle Jurassic stratum statistical form
5 Junggar Basin different times precipitation of table and penetration stage duration table
| J1s | J2x | J2t | J3 | K1 | K2 | E | N-Q | |
| Annual rainfall P (mm/a) | 800 | 700 | 600 | 200 | 350 | 200 | 400 | 200 |
| Duration t (× 106a) | 16.7 | 5.8 | 4.8 | 18.5 | 44.5 | 34.5 | 43 | 23 |
6 In The Eastern Junggar Basin Gu of table penetrates into water alternate intensity calculation result table
Middle Jurassic series headache formula group water-bearing layer (J2T) ancient water leaking-in is alternately maximum, has reached 8487.9, seeping master
It develops in Paleogene Period (E) and Early Creataceous Epoch (K1)。
Step S6
Since based on being lifted, most of period does not have a water seepage effect on stratum after the Early Creataceous Epoch, therefore with early chalk
The exudation water alternate intensity of generation calculates lifting phase water-bearing layer fossil ground water alternate intensity.Water alternate intensity and ancient infiltration are penetrated into according to Gu
Water alternate intensity calculates low~middle Jurassic different times fossil ground water alternate intensity out, and calculated result is shown in Table 7.
7 low~middle Jurassic different times fossil ground water alternate intensity of table
By calculated result as it can be seen that low~middle Jurassic J1b、J1s、J2x、J2The water-bearing layer t group is by the strong alternating of water leaking-in
Effect, each period fossil ground water action intensity is more than 100, in Early Creataceous Epoch K1Fossil ground water alternating action is most strong, is weight
The U metallogeny phase wanted.In Junggar Basin Ka Musi specially area J1B and J1S water-bearing rock group buried depth is larger, J2The water-bearing layer t group is opposite
In J2X is buried more shallowly, and fossil ground water alternate intensity is bigger, is considered from ancient hydrodynamics angle, J2The water-bearing layer t group is Junggar Basin
Ground east card nurse this specially area is best looks for mine target zone.The headache formula group J of this area2T had been achieved with sandstone in 2015
Type Prospecting For Uranium breaks through (gold ribbon, 2016), demonstrates the validity of the invention.
It can be seen that fossil ground water alternate intensity calculated result is accurate, reliable, provided for sandstone-type uranium mineralization with respect prediction reliable
Ancient paddy soil judgment basis also has important reference to appositional pattern MINERAL PREDICTIONs other in basin.
It within the knowledge of a person skilled in the art, can also be in the premise for not departing from present inventive concept
Under make corresponding change.The content being not described in detail in the present invention can use the prior art.
Claims (10)
1. a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method, it is characterised in that: the following steps are included:
Step S1 divides the palaeohydrogeology phase time；
Step S2 statistics drilling mud stone and sandstone thickness；
Step S3 calculates formation compaction thickness；
Step S4 calculates ancient water seepage action intensity；
Step S5 calculates ancient water leaking-in action intensity；
Step S6 calculates water-bearing layer fossil ground water alternate intensity.
2. a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method according to claim 1, feature exist
In: in step S1, according to the basin-mountain frame work phase time, and sandstone-type uranium mineralization with respect Main Metallogenic target zone is combined, with dividing the ancient hydrology
The matter phase time.
3. a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method according to claim 1, feature exist
In: in step S2, the mud stone includes silty and coal；The sandstone includes gritstone, middle sandstone, packsand and flour sand
Rock.
4. a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method according to claim 1 or 3, feature
It is: in step S3, formation compaction thickness is calculated using following formula:
δ H=H1-HIt is existing=H1(m1-mIt is existing)/(1-mIt is existing)
In formula,
δ H is formation compaction thickness；
HIt is existingTo look for mine target zone in evaluation phase formation thickness；
H1To look for mine target zone formation thickness before the evaluation phase；
mIt is existingTo look for mine target zone in evaluation phase stratum mudstone porosity；
m1To look for mine target zone in evaluation phase preceding stratum mudstone porosity.
5. a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method according to claim 4, feature exist
In: in step S3, representational buried depth and porosity standard variation curve are chosen, is peeled back to technology using inverting, successively
Calculating looks for mine target zone and its overlying strata in the mudstone porosity in a certain period.
6. a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method according to claim 4, feature exist
In: in step S4, ancient water seepage action intensity is calculated using following formula:
IExudation=(Sn×δH)/(Ss×Hs×ms)
In formula,
IExudationFor ancient water seepage action intensity；
SnTo look for mine target zone mud stone distribution area before the evaluation phase；
SsTo look for sandstone aquifer distribution area in mine target zone；
HsTo look for sandstone aquifer thickness in mine target zone；
msTo evaluate phase sandstone porosity.
7. a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method according to claim 6, feature exist
In: in step S4, in same water-bearing rock group, Sn=Ss。
8. a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method according to claim 6, feature exist
In: in step S5, ancient water leaking-in action intensity is calculated using following formula:
IIt penetrates into=F × P × a × t/ (Ss×Hs×ms)
In formula,
IIt penetrates intoFor ancient water leaking-in action intensity；
F is to look for mine target zone basin edge outcrop area；
P is annual rainfall；
A is precipitation recharge coefficient；
T is the penetration stage duration.
9. a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method according to claim 8, feature exist
In: in step S5, look for mine target zone basin edge outcrop area F and sandstone aquifer distribution area SsIt measures and determines on geologic map；
Annual rainfall P is determined with reference to the precipitation under the conditions of Different climate now using analogy method according to geologic climate data；Rainfall enters
Infiltration coefficient a comprehensively considers stratum relative elevation, the seepage of water of sandstone and earth's surface network of rivers developmental state and determines；When penetration stage continues
Between t according to absolute geochronology determine.
10. a kind of sandstone-type uranium mineralization with respect fossil ground water alternate intensity quantitative calculation method according to claim 8, feature exist
In: in step S6, fossil ground water alternate intensity in water-bearing layer is calculated using following formula:
I=IIt penetrates into/IExudation==(F × P × a × t)/(Sn×δH)
In formula,
I is water-bearing layer fossil ground water alternate intensity.
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| CN110889206A (en) * | 2019-11-07 | 2020-03-17 | 核工业北京地质研究院 | Quantitative calculation method for sandstone-type uranium mineralization time between weak-structure single-inclined-belt layers |
| CN114114458A (en) * | 2021-11-17 | 2022-03-01 | 核工业北京地质研究院 | Method for predicting sandstone-type uranium ore deep blind ore body under thick-coverage and super-coverage background |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110889206A (en) * | 2019-11-07 | 2020-03-17 | 核工业北京地质研究院 | Quantitative calculation method for sandstone-type uranium mineralization time between weak-structure single-inclined-belt layers |
| CN110889206B (en) * | 2019-11-07 | 2023-07-14 | 核工业北京地质研究院 | Quantitative calculation method for sandstone uranium mineralization time between weak-structure single-inclined belt layers |
| CN114114458A (en) * | 2021-11-17 | 2022-03-01 | 核工业北京地质研究院 | Method for predicting sandstone-type uranium ore deep blind ore body under thick-coverage and super-coverage background |
| CN114114458B (en) * | 2021-11-17 | 2024-01-12 | 核工业北京地质研究院 | Sandstone type uranium ore deep blind ore body prediction method under thick coverage overburden background |
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