CN108335223A - A kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method - Google Patents
A kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method Download PDFInfo
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- 229910052770 Uranium Inorganic materials 0.000 title claims abstract description 162
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000033558 biomineral tissue development Effects 0.000 title claims abstract description 29
- 238000005516 engineering process Methods 0.000 title claims abstract description 23
- 238000004458 analytical method Methods 0.000 claims abstract description 26
- 239000000284 extract Substances 0.000 claims abstract description 12
- 230000002349 favourable effect Effects 0.000 claims abstract description 12
- 239000004576 sand Substances 0.000 claims description 88
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- 208000035126 Facies Diseases 0.000 claims description 18
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- 238000007254 oxidation reaction Methods 0.000 claims description 17
- 238000010276 construction Methods 0.000 claims description 16
- 238000011161 development Methods 0.000 claims description 14
- 230000018109 developmental process Effects 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 14
- 230000008021 deposition Effects 0.000 claims description 12
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- 238000000605 extraction Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 9
- 238000011156 evaluation Methods 0.000 claims description 8
- 230000003628 erosive effect Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 206010019909 Hernia Diseases 0.000 claims description 4
- 101000744515 Homo sapiens Ras-related protein M-Ras Proteins 0.000 claims description 4
- 102100039789 Ras-related protein M-Ras Human genes 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
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- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 claims description 3
- 229910052776 Thorium Inorganic materials 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000010835 comparative analysis Methods 0.000 claims description 3
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- 238000012217 deletion Methods 0.000 claims description 3
- 230000037430 deletion Effects 0.000 claims description 3
- 238000010790 dilution Methods 0.000 claims description 3
- 239000012895 dilution Substances 0.000 claims description 3
- 238000004393 prognosis Methods 0.000 claims description 3
- 229910052704 radon Inorganic materials 0.000 claims description 3
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000002427 irreversible effect Effects 0.000 abstract description 3
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- 230000009466 transformation Effects 0.000 description 4
- 230000004075 alteration Effects 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 241001045988 Neogene Species 0.000 description 2
- 244000061458 Solanum melongena Species 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 101150091879 neo gene Proteins 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011028 pyrite Substances 0.000 description 2
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 2
- 229910052683 pyrite Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
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- 239000002253 acid Substances 0.000 description 1
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- 239000010433 feldspar Substances 0.000 description 1
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- 239000005416 organic matter Substances 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 230000032696 parturition Effects 0.000 description 1
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- 238000004904 shortening Methods 0.000 description 1
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- 238000003786 synthesis reaction Methods 0.000 description 1
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Abstract
The invention belongs to a kind of uranium geology studying technological domains, specifically disclose a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method, this method comprises the following steps：Step 1, the advantageous geologic setting of U metallogeny and ore-forming setting are determined；Step 2, mine destination layer sedimentary subfacies or microfacies and spatial distribution are looked in determination；Step 3, the identification and positioning of U metallogeny favorab1e sandbadies；Step 4, it integrates and extracts at mine advantageous information；Step 5, delineation is at mine Favorable Areas, overall merit minerogenic potentiality；Each step of the present invention is in irreversible mode of taking advantage of a situation, can efficiently, it is quick, objectively evaluate a regional U metallogeny potentiality；Uranium geologic setting and ore-forming setting analysis are primary factors, and wherein uranium source analysis is the most important thing, if uranium source is not present in this area, other conditions there will not be well the presence of uranium ore again；By analyzing metallogenetic geologic setting and ore-forming setting, it is determined that advantageous minerogenetic conditions.
Description
Technical field
The invention belongs to uranium geology studying technological domains, and in particular to a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method.
Background technology
Sandstone-type uranium mineralization with respect is substantially the buried blind ore in sedimentary basin, and the uranium ore body of crop out is largely degraded
Leaching, no use value.The most directly effective method of uranium ore body for finding the type is exactly that probing discloses, but economy at
Ben Taigao does not meet the current economic development constitution in China.To precisely, efficiently find sandstone-type uranium mineralization with respect, more have at present
The method of effect is exactly data (including geology, drilling, the survey for making full use of the departments such as coalfield and oil to carry out in each basin
Well, earthquake, physical prospecting, change visit, remote sensing), in conjunction with Ministry of Nuclear Industry ground radiological survey, boat put with the data such as magnetic airborne survey,
By analyzing this area's Geological characteristics of uranium metallogenesis, extracts to the advantageous information of Prospecting For Uranium, tentatively draw a circle to approve prospective area, then pass through
A small amount of probing verification, further analyzes metallogenic geologic features and ore information, gradually reduces and reconnoitres range, finally locks target
Area.
This method is built upon on the basis of certain uranium ore research, forefathers' data is made full use of, in conjunction with necessary geology
Work, rapid extraction look for mine advantageous information, the economical and efficient ground regional U metallogeny potentiality of overall merit one, and comply with me
State is just moving towards the big data epoch, utilizes a kind of effective ways of looking for deposit with complex information.
Invention content
The purpose of the present invention is to provide a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method, this method is whole by synthesis
Basic geological data and Geophysical-chemical data are managed, U metallogeny feature is studied, extracts ore information, draws a circle to approve Prospective area for uranium, it is objective
Evaluation region U metallogeny potentiality.
Realize the technical solution of the object of the invention：A kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method, this method include such as
Lower step：
Step 1, the advantageous geologic setting of U metallogeny and ore-forming setting are determined；
Step 2, mine destination layer sedimentary subfacies or microfacies and spatial distribution are looked in determination；
Step 3, the identification and positioning of U metallogeny favorab1e sandbadies；
Step 4, it integrates and extracts at mine advantageous information；
Step 5, delineation is at mine Favorable Areas, overall merit minerogenic potentiality.
The step 1 includes the following steps：
Step 1.1 analyzes destination layer containing mine and its overlying inside the uranium source and basin of basin peripheral foot erosion source region
The uranium source that stratum is built.
Step 1.2 determines the advantageous geological conditions of U metallogeny by tectonic sedimentary-Paleoclimatic Evolution comprehensive analysis.
In the step 1.1, uranium source analysis is the primary essential and requisite item of U metallogeny Potential Evaluation, both
The uranium source for analyzing basin peripheral foot erosion source region is analyzed destination layer containing mine and its superstratum inside basin and is built again
The uranium source made.
The data of uranium source analysis can utilize measured data and boat put data, not only to analyze geologic body whether uranium-bearing
(5×10-6~10 × 10-6) or rich uranium (>10×10-6), more to analyze ancient uranium content (Gui), active uranium content (Hui) and uranium
Several key parameters such as transport coefficient (Bi), calculation formula such as formula (1) (2) shown in (3)；
Hui=Gui-Ui (2)
Bi=Hui/Gui (3)
Thi-actual measurement thorium content；Ui-actual measurement uranium content；- geologic element U/Th average values.
Wherein active uranium content (Hui) positive value shows that the point provides the ratio of mobile uranium for other locations, and negative value shows this
Point receives the enrichment of later stage uranium；When uranium transport coefficient (Bi) is more than 1, which has moving into and being enriched with for uranium, otherwise shows uranium
Move out and dilution.
In the step 1.2, to analyze and look for whether the mine destination layer deposition phase has stable tectonic subsidence and relative humidity
Geologic climate, it is ensured that destination layer have steady and continuous sand body deposit, sand thickness will have abundant in 20~60m, and in sand body
Organic matters, the organic carbon content such as breeze, seam want>0.2%；The deposition diagenesis later stage of destination layer containing mine will have stable construction
Lifting acts on and relatively arid paleoclimate condition, destination layer buried depth are advisable at 1000 meters with shallow, has part to go out in pelvic floor hernia
Open country table can provide water inlet for the injection of uranium-bearing oxygenated water；There is certain effect of tilting during construction lifting, cause
Destination layer has stable slope belt development, ramp angles to be generally less than 10 °, and slope length is wanted>7km can be interlayer oxidized zone
Development sufficient action time is provided；The U metallogeny later stage should not have strong construction lifting effect, ore body can be caused to be raised to
Earth's surface degrades destruction.The sandstone-type uranium deposit phase is often arid with this area's sedimentary formation long term deletion phase and same period geologic climate
Condition matches, this is an important Geologic Indicators for analyzing the U metallogeny phase.
Borehole data and well-log information are fully collected in the step 2, in conjunction with surface occurence, establish sedimentary facies,
The distinguishing mark of parfacies and microfacies；Pass through a plurality of drilling even well profile, the distribution mode of comparative analysis sedimentary facies, in sand body thickness
It spends on the basis of isopleth map and the establishment of sand factor isopleth map, further establishment deposition phasor；Sedimentary facies is studied to close with U metallogeny
System determines control mine sedimentary facies.The best sedimentary facies of sandstone-type uranium mineralization with respect is braided stream and braided river delta, followed by song
Flow river and meandering stream delta phase.
The step 3 includes the following steps：
Mine destination layer favorab1e sandbadies thickness is looked in step 3.1 determination
The advantageous sand factor of mine destination layer is looked in step 3.2 determination
Step 3.3 determination looks for mine destination layer favorably to aoxidize sand coarse aggregate ratio
Step 3.1 on the basis of above-mentioned steps 2 work out sand thickness isopleth map, with U metallogeny close by analysis sand thickness
System establishes advantageous sand thickness and spatial distribution；
Step 3.2 analyzes sand factor and relationship to uranium ore formation, really on the basis of above-mentioned steps 2 work out sand factor isopleth map
Found advantageous sand factor and spatial distribution；
Destination layer oxidation sand coarse aggregate ratio isopleth map is worked out in the step 3.3.Wherein 0 in grey detrital deposit construction
Primary Grey Reduction environment is represented, primary Grey Reduction environment is represented in red detrital deposit construction, and representing oil gas will
The primary red reducing environment built transformation grey and built.Analysis oxidation sand coarse aggregate ratio and relationship to uranium ore formation, establish advantageous oxidation
Sand coarse aggregate ratio and spatial distribution.
The step 4 includes the following steps：
Step 4.1 extracts advantageous information of the geological conditions to U metallogeny；
Step 4.2 extraction boat is put, physical prospecting, is changed in the data such as spy, remote sensing to Uranium Metallogenic Prognosis advantageous information.
The advantageous geological conditions that the step 4.1 is extracted includes channel deposit parfacies, the distribution of destination layer stabling slope band
Area, the distributed area of destination layer favorab1e sandbadies thickness, the distributed area of the advantageous sand factor of destination layer, destination layer favorably aoxidize sand coarse aggregate ratio
Distributed area.
The advantageous predictive information that the step 4.2 is extracted includes that boat puts uranium enrichment region, mobile uranium enrichment region and uranium loss
Area, ground radiological survey U contents exceptions area, control mine fold and the fracture of navigate magnetic and gravity joint interpretation, soil radon measurement
Exceptional value distributed area.
The step 5 will be wanted by ArcGIS softwares or MapGIS software realizations at the advantageous geological information of mine and prediction
The conversion and extraction of element are drawn a circle to approve by MRAS softwares and man-machine joint into mine Favorable Areas, and the Beneficial Ore-forming condition of analyzed area
And unfavorable factor, finally realize objective, accurately and efficiently evaluation region U metallogeny potentiality.
The beneficial technical effect of the present invention lies in：
1, each step of the present invention is in irreversible mode of taking advantage of a situation, can efficiently, it is quick, objectively evaluate one it is regional
U metallogeny potentiality；
2, uranium geologic setting and ore-forming setting analysis are primary factors, and wherein uranium source analysis is the most important thing, if
Uranium source is not present in this area, then other conditions there will not be well the presence of uranium ore again；
3, by analyzing metallogenetic geologic setting and ore-forming setting, it is determined that advantageous minerogenetic conditions, then make full use of
The data such as materialization is distant and boat is put, extraction component of forecast, not only cost-effective, the shortening period, but also can be advantageous compared with mine is accurately drawn a circle to approve into
Area, overall merit U metallogeny potentiality provide for Prospecting For Uranium work and reconnoitre deployment foundation.
Specific implementation mode
With reference to embodiment, invention is further described in detail.
Realize the technical solution of the object of the invention：A kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method, this method include such as
Lower step：
Step 1, the advantageous geologic setting of U metallogeny and ore-forming setting are determined；
Step 2, mine destination layer sedimentary subfacies or microfacies and spatial distribution are looked in determination；
Step 3, the identification and positioning of U metallogeny favorab1e sandbadies；
Step 4, it integrates and extracts at mine advantageous information；
Step 5, delineation is at mine Favorable Areas, overall merit minerogenic potentiality.
The step 1 includes the following steps：
Step 1.1 analyzes destination layer containing mine and its overlying inside the uranium source and basin of basin peripheral foot erosion source region
The uranium source that stratum is built.
Step 1.2 determines the advantageous geological conditions of U metallogeny by tectonic sedimentary-Paleoclimatic Evolution comprehensive analysis.
In the step 1.1, uranium source analysis is the primary essential and requisite item of U metallogeny Potential Evaluation, both
The uranium source for analyzing basin peripheral foot erosion source region is analyzed destination layer containing mine and its superstratum inside basin and is built again
The uranium source made.
The data of uranium source analysis can utilize measured data and boat put data, not only to analyze geologic body whether uranium-bearing
(5×10-6~10 × 10-6) or rich uranium (>10×10-6), more to analyze ancient uranium content (Gui), active uranium content (Hui) and uranium
Several key parameters such as transport coefficient (Bi), calculation formula such as formula (1) (2) shown in (3)；
Hui=Gui-Ui (2)
Bi=Hui/Gui (3)
Thi-actual measurement thorium content；Ui-actual measurement uranium content；- geologic element U/Th average values.
Wherein active uranium content (Hui) positive value shows that the point provides the ratio of mobile uranium for other locations, and negative value shows this
Point receives the enrichment of later stage uranium；When uranium transport coefficient (Bi) is more than 1, which has moving into and being enriched with for uranium, otherwise shows uranium
Move out and dilution.
In the step 1.2, to analyze and look for whether the mine destination layer deposition phase has stable tectonic subsidence and relative humidity
Geologic climate, it is ensured that destination layer have steady and continuous sand body deposit, sand thickness will have abundant in 20~60m, and in sand body
Organic matters, the organic carbon content such as breeze, seam want>0.2%；The deposition diagenesis later stage of destination layer containing mine will have stable construction
Lifting acts on and relatively arid paleoclimate condition, destination layer buried depth are advisable at 1000 meters with shallow, has part to go out in pelvic floor hernia
Open country table can provide water inlet for the injection of uranium-bearing oxygenated water；There is certain effect of tilting during construction lifting, cause
Destination layer has stable slope belt development, ramp angles to be generally less than 10 °, and slope length is wanted>7km can be interlayer oxidized zone
Development sufficient action time is provided；The U metallogeny later stage should not have strong construction lifting effect, ore body can be caused to be raised to
Earth's surface degrades destruction.The sandstone-type uranium deposit phase is often arid with this area's sedimentary formation long term deletion phase and same period geologic climate
Condition matches, this is an important Geologic Indicators for analyzing the U metallogeny phase.
Borehole data and well-log information are fully collected in the step 2, in conjunction with surface occurence, establish sedimentary facies,
The distinguishing mark of parfacies and microfacies；Pass through a plurality of drilling even well profile, the distribution mode of comparative analysis sedimentary facies, in sand body thickness
It spends on the basis of isopleth map and the establishment of sand factor isopleth map, further establishment deposition phasor；Sedimentary facies is studied to close with U metallogeny
System determines control mine sedimentary facies.The best sedimentary facies of sandstone-type uranium mineralization with respect is braided stream and braided river delta, followed by song
Flow river and meandering stream delta phase.
The step 3 includes the following steps：
Mine destination layer favorab1e sandbadies thickness is looked in step 3.1 determination
The advantageous sand factor of mine destination layer is looked in step 3.2 determination
Step 3.3 determination looks for mine destination layer favorably to aoxidize sand coarse aggregate ratio
Step 3.1 on the basis of above-mentioned steps 2 work out sand thickness isopleth map, with U metallogeny close by analysis sand thickness
System establishes advantageous sand thickness and spatial distribution；
Step 3.2 analyzes sand factor and relationship to uranium ore formation, really on the basis of above-mentioned steps 2 work out sand factor isopleth map
Found advantageous sand factor and spatial distribution；
Destination layer oxidation sand coarse aggregate ratio isopleth map is worked out in the step 3.3.Wherein 0 in grey detrital deposit construction
Primary Grey Reduction environment is represented, primary Grey Reduction environment is represented in red detrital deposit construction, and representing oil gas will
The primary red reducing environment built transformation grey and built.Analysis oxidation sand coarse aggregate ratio and relationship to uranium ore formation, establish advantageous oxidation
Sand coarse aggregate ratio and spatial distribution.
The step 4 includes the following steps：
Step 4.1 extracts advantageous information of the geological conditions to U metallogeny；
Step 4.2 extraction boat is put, physical prospecting, is changed in the data such as spy, remote sensing to Uranium Metallogenic Prognosis advantageous information.
The advantageous geological conditions that the step 4.1 is extracted includes channel deposit parfacies, the distribution of destination layer stabling slope band
Area, the distributed area of destination layer favorab1e sandbadies thickness, the distributed area of the advantageous sand factor of destination layer, destination layer favorably aoxidize sand coarse aggregate ratio
Distributed area.
The advantageous predictive information that the step 4.2 is extracted includes that boat puts uranium enrichment region, mobile uranium enrichment region and uranium loss
Area, ground radiological survey U contents exceptions area, control mine fold and the fracture of navigate magnetic and gravity joint interpretation, soil radon measurement
Exceptional value distributed area.
The step 5 will be wanted by ArcGIS softwares or MapGIS software realizations at the advantageous geological information of mine and prediction
The conversion and extraction of element are drawn a circle to approve by MRAS softwares and man-machine joint into mine Favorable Areas, and the Beneficial Ore-forming condition of analyzed area
And unfavorable factor, finally realize objective, accurately and efficiently evaluation region U metallogeny potentiality.
The beneficial technical effect of the present invention lies in：Each step of the present invention is in irreversible mode of taking advantage of a situation, can efficiently, soon
A regional U metallogeny potentiality are objectively evaluated in victory.Uranium geologic setting and ore-forming setting analysis are primary factors, wherein uranium
Source condition analysis is the most important thing, if uranium source is not present in this area, other conditions there will not be uranium ore well again
In the presence of；By analyzing metallogenetic geologic setting and ore-forming setting, it is determined that advantageous minerogenetic conditions, then make full use of materialization
Distant and boat such as puts at the data, extracts component of forecast, not only cost-effective, shorten the period, but also can more accurately draw a circle to approve into mine Favorable Areas, comprehensive
Evaluation U metallogeny potentiality are closed, is provided for Prospecting For Uranium work and reconnoitres deployment foundation.
Embodiment
By taking ordovician Series In The Southern Margin of The Ordos Basin Bin County-Changwu Region as an example, a kind of sandrock-type that the present invention will be described in detail is provided
Uranium ore Comprehensive Assessment Technology method.
Bin County-Changwu Region tectonics is located in Ordos Basin her Shan slope of secondary structural element and Weihe north is grand
The intermediate location risen.The sedimentary cover of exposure is developed from bottom to top upper Triassic series, Middle Jurassic series YAN ' AN FORMATION, straight sieve group and peace
Determine group, Lower Cretaceous Series, Neogene System and the 4th system, missing Lower Jurassic Series Fu County group, Malm fragrance river group, upper Cretaceous series and
Paleogene System.Straight sieve group hypomere is main target zone containing mine, and pay-rock is mainly the grey feldspar stone rich in breeze and pyrite
Sand rock, followed by grey-green sandstone.Ledge bottom is thick-layer grey mud stone at the top of YAN ' AN FORMATION, is straight sieve at the top of ledge
Group epimere thick-layer aubergine mudstone, has " mud-sand-mud " advantageous structure of U metallogeny.Unfavorable factor is that ledge is by basin
Ground mantle fold squeezes and a variety of effects such as diagenetic compaction and the transformation of later stage fluid, causes sand body epigenetic alteration complicated more
Sample, Uranium ore forming process are also a variety of effects of more phases time, and additional landforms cheuch in length and breadth, gives ordovician Series In The Southern Margin of The Ordos Basin uranium ore
It reconnoitres and brings certain difficulty.The present invention is also that be relatively more suitable for geological conditions more complicated, has certain difficulty to geologic prospect
The region of degree makes full use of various data, quickly and efficiently a kind of technical method of comprehensive analysis U metallogeny potentiality.
A kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method provided by the present invention, this method comprises the following steps：
Step 1, the advantageous geologic setting of U metallogeny and ore-forming setting are determined
Step 1.1 by containing mine destination layer sand body detrital material ingredient, structure, construction and bottom clastic composition and occurrence,
Determine Sediment Source and uranium source essentially from the basin west and south and western both direction, wherein west and south North Qinling Area distribution
It is (2.2~8.6) × 10 to have middle acid granits, migmatite and the metamorphic rock of the early Yanshan movement of large area, uranium content-6, leach
Rate is 43%~54%, and it is good that source region uranium source is lost in basin；Bin County-Changwu Region stratum uranium content average value is 1.99 × 10-6, wherein the primary gray post uranium content of straight sieve group is (4.72~9.01) × 10-6, straight sieve group grey-green sandstone uranium content is
(2.19~2.62) × 10-6, canescence sandstone uranium content 3.45 × 10-6, obviously there is the phenomenon that uranium is lost compared with gray post.
It is also quite abundant to show that straight sieve group derives uranium source, to giving birth to sandstone-type uranium mineralization with respect after formation also advantageously.
Step 1.2 passes through tectonic sedimentary-geologic climate comprehensive analysis uranium formation conditions.It is newborn in ordovician Series In The Southern Margin of The Ordos Basin
Experience generation, sedimentation 2 phases, the lifting of 5 phases, the periphery rift activity of 1 phase.Sedimentation period：Extended period, fragrant river phase；The lifting phase：Extended period
End, the Yan'an end of term, straight sieve end of term, the fragrant river end of term and the Zhidan end of term；Periphery rift activity：Early Himalaya.
Straight sieve early stage geologic climate of sedimentation period moistens, and development has pigtail river facies, sand body 5~15m of thickness in monolayer to add up thickness
For degree generally in 10~50m, primary gray sand body organic carbon content is 0.3%~1.1%.But the same period is again by succession YAN ' AN FORMATION
Approximately EW fold control arranged in parallel, the thicker region of sand body is mainly distributed in tiltedly, is in approximately EW spread.Always
It, the deposition phase develops advantageous sand body condition.
Straight early stage in sieve latter stage to Early Creataceous Epoch and Late Cretaceous-Paleocene cause the same period to the Neogene System two long-term lifting phase
Sedimentary break, the period geologic climate is relatively arid, in pelvic floor hernia or has the region for constructing skylight, target zone containing mine to go out open country
Table is conducive to the injection of uranium-bearing oxygenated water, develops interlayer oxidized zone in straight sieve group hypomere.Bin County-Changwu Region is in straight sieve latter stage
Low, the high in the east and low in the west tectonic framework in the high south in north is presented to the early stage Cretaceous period, has the interlayer oxygen from north orientation south along northern protuberance development
Change band；So far landforms are high in the east and low in the west, high in the south and low in the north to Late Cretaceous-Paleocene, develop the interlayer oxidized zone from south orientation north.Period is again
Development has more phase gas reduction alterations, acidic fluid kaolinization alteration, before leading to ordovician Series In The Southern Margin of The Ordos Basin interlayer oxidized zone
Forward line is complicated and changeable, is also difficult to control the distribution of preceding forward line at present.The interlayer oxidized zone of development is overall by the slope of oblique both wings
Band control, it is preferable to oblique development area uranium formation conditions.
Step 2, mine destination layer sedimentary subfacies or microfacies and spatial distribution are looked in determination
It is edited and recorded by drill core, form of logs comparison, geology outcrop observation, even well profile is analyzed for drilling, determination
The straight sieve group hypomere major developmental pigtail river facies deposition in Bin County-Changwu Region.By to 152 mouthfuls of borehole data statistics, establishment in area
Straight sieve group hypomere sand thickness isopleth map and sand factor isopleth map, pass through sand thickness, the knowledge of sand factor and each parfacies of braided stream
Do not indicate, mark off river parfacies, flood plain parfacies and channel bar parfacies, establishment deposition phasor altogether, wherein river main body contains sand
Rate>70%.
Step 3, the identification and positioning of U metallogeny favorab1e sandbadies
Mine destination layer favorab1e sandbadies thickness is looked in step 3.1 determination
Step 3.1 analyzes uranium mineralization and sand thickness on the basis of above-mentioned steps 2 work out sand thickness isopleth map
Relationship establishes sand thickness within the scope of 20~50m as at mine Favorable Areas；
Step 3.2 analyzes the relationship of uranium mineralization and sand factor on the basis of above-mentioned steps 2 work out sand factor isopleth map,
Sand factor is established in 60%~90% range as at mine Favorable Areas, the region sand-body distribution is continuous, stablizes, and has a small amount of
Thin layers of mudstone interlayer, be more advantageous to the absorption to uranium into mine；
Step 3.3 determination looks for mine destination layer favorably to aoxidize sand coarse aggregate ratio
The sand body of the straight sieve group hypomere connate deposit in Bin County-Changwu Region is grey, is rich in breeze, seam and pyrite, ash
Smalt body is represented as reducing environment；Other than gray sand body, also development has aubergine, maroon, yellowish-brown, canescence, grayish green
The sand body of the multiple colors such as color, variegated, wherein celadon sand body are that ancient oxidation sand body is transformed through gas reduction, canescence
Sand body is that acidic fluid forms the hydrolysis alteration of ancient oxidation sand body, and generally the sand body of these colors represents certain oxygen
Change acts on, and it is oxidation sand body that can unify merger.Finally with 152 data organizations oxygenation efficiency isopleth map.Analysis oxidation sand coarse aggregate ratio with
Uranium mineralization relationship establishes oxidation sand coarse aggregate ratio in 0~50% range as at mine Favorable Areas.
Step 4, it integrates and extracts at mine advantageous information；
The advantageous geological conditions that the step 4.1 is extracted includes braided channel sedimentary subfacies, destination layer stabling slope band
Distributed area, destination layer favorab1e sandbadies thickness the distributed area of 20~50m, destination layer sand factor 60%~90% distributed area,
Destination layer aoxidizes distributed area of the sand coarse aggregate ratio 0~50%.
The advantageous predictive information that the step 4.2 is extracted includes that boat puts U/Th>0.32 uranium enrichment region, mobile uranium Hui
<- 1 uranium enrichment region and Hui>1 uranium loss area, control mine fold and the fracture of navigate magnetic and gravity joint interpretation.Boat puts U/Th>
0.32 uranium enrichment region and mobile uranium Hui<- 1 uranium enrichment region coincide substantially, and is distributed in the nearly east-west cap rock back of the body
Between tiltedly in tiltedly, fold control mine is a distinctive marks of this area's U metallogeny, and crucial ore control factor；Unfavorable
Factor is that uranium enrichment region area is smaller, and disperses, this develops more phase time interlevel oxidations with step 1.2 analysis U metallogeny process and makees
It is consistent with the result acted on fluid transformation.Hui>1 uranium loss area is mainly distributed on the west and south and the northwestward, i.e. object
The source direction in source and uranium source, it is correct further to have proved the walking direction of erosion source region.
Step 5, delineation is at mine Favorable Areas, overall merit minerogenic potentiality
The advantageous prediction that the step 5 first extracts advantageous geologic elements and step 4.2 that step 4.1 is extracted is believed
Breath is expressed in the figure layer form in the areas MapGIS Zhong Yi, then utilize MRAS softwares and geology personnel combine delineation uranium at
Mine prospective area, establishment prediction result map.3 prospective areas have been drawn a circle to approve, per a piece of prospective area have been multiple advantageous geologic elements and pre-
The Overlay District of measurement information, reliability forecasting are high.
Pass through above 5 step, it is known that ordovician Series In The Southern Margin of The Ordos Basin Bin County-Changwu Region has preferable uranium source, hair
Pigtail river facies and its suitable thickness sand body rich in organic matter are given birth to, later stage development has interlayer oxidation and gas reduction to change
Affected use, is conducive to U metallogeny.But the nearly east-west fold belt that straight sieve group deposition phase just inherits divided sand body and
There is the superposition of the different directions of more phases time again, cause later stage uranium enrichment region smaller in interlayer oxidized zone, interlevel oxidation direction, at
Mine scale is limited, should be to find based on middle-size and small-size uranium deposit, and large-scale ore body may be also in the north in research area.
The present invention is explained in detail above in conjunction with embodiment, but the present invention is not limited to above-described embodiments, at this
Field those of ordinary skill within the scope of knowledge, can also make various without departing from the purpose of the present invention
Variation.The prior art may be used in the content not being described in detail in the present invention.
Claims (13)
1. a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method, which is characterized in that this method comprises the following steps：
Step 1, the advantageous geologic setting of U metallogeny and ore-forming setting are determined；
Step 2, mine destination layer sedimentary subfacies or microfacies and spatial distribution are looked in determination；
Step 3, the identification and positioning of U metallogeny favorab1e sandbadies；
Step 4, it integrates and extracts at mine advantageous information；
Step 5, delineation is at mine Favorable Areas, overall merit minerogenic potentiality.
2. a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method according to claim 1, which is characterized in that the step
1 includes the following steps：
Destination layer containing mine and its superstratum are built inside the uranium source of step 1.1 analysis basin peripheral foot erosion source region and basin
The uranium source made；
Step 1.2 determines the advantageous geological conditions of U metallogeny by tectonic sedimentary-Paleoclimatic Evolution comprehensive analysis.
3. a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method according to claim 2, it is characterised in that：The step
In 1.1, uranium source analysis is the primary essential and requisite item of U metallogeny Potential Evaluation, should analyze basin peripheral foot erosion
The uranium source of source region analyzes the uranium source that destination layer containing mine and its superstratum are built inside basin again；
The data of uranium source analysis can utilize measured data and boat put data, not only to analyze geologic body whether uranium-bearing (5 × 10-6~10 × 10-6) or rich uranium (>10×10-6), more to analyze ancient uranium content (Gui), active uranium content (Hui) and uranium transport system
Number (Bi) etc. several key parameters, calculation formula such as formula (1) (2) shown in (3)；
Hui=Gui-Ui (2)
Bi=Hui/Gui (3)
Thi-actual measurement thorium content；Ui-actual measurement uranium content；- geologic element U/Th average values；
Wherein active uranium content (Hui) positive value shows that the point provides the ratio of mobile uranium for other locations, and negative value shows that the point connects
It is enriched with by later stage uranium；When uranium transport coefficient (Bi) is more than 1, which has moving into and being enriched with for uranium, otherwise shows moving for uranium
Go out and dilution.
4. a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method according to claim 3, it is characterised in that：The step
In 1.2, the geologic climate for looking for the mine destination layer deposition phase whether to have stable tectonic subsidence and relative humidity is analyzed, it is ensured that destination layer
There is the sand body of steady and continuous to deposit, sand thickness will have the organic matters such as abundant breeze, seam in 20~60m, and in sand body,
Organic carbon content is wanted>0.2%；The deposition diagenesis later stage of destination layer containing mine will have stable construction lifting effect and relatively arid Gu
Weather conditions, destination layer buried depth are advisable at 1000 meters with shallow, have local crop out in pelvic floor hernia, can be uranium-bearing oxygenated water
Injection provides water inlet；There is certain effect of tilting during construction lifting, destination layer is caused to have stable slope belt development,
Ramp angles are generally less than 10 °, and slope length is wanted>7km can provide sufficient action time for the development of interlayer oxidized zone；
The U metallogeny later stage should not have strong construction lifting effect, and ore body can be caused to be raised to earth's surface and degrade destruction.Sandstone-type uranium deposit
Phase often matches with this area's sedimentary formation long term deletion phase and same period geologic climate for drought condition, this is the analysis U metallogeny phase
An important Geologic Indicators.
5. a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method according to claim 4, it is characterised in that：The step
Borehole data and well-log information are fully collected in 2, in conjunction with surface occurence, establish the identification mark of sedimentary facies, parfacies and microfacies
Will；By a plurality of drilling even well profile, the distribution mode of comparative analysis sedimentary facies is equivalent in sand thickness isopleth map and sand factor
On the basis of figure establishment, further establishment deposits phasor；Sedimentary facies and relationship to uranium ore formation are studied, determines control mine sedimentary facies.Sandstone
The best sedimentary facies of type uranium ore is braided stream and braided river delta, followed by meandering stream and meandering stream delta phase.
6. a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method according to claim 5, it is characterised in that：The step
3 include the following steps：
Mine destination layer favorab1e sandbadies thickness is looked in step 3.1 determination；
The advantageous sand factor of mine destination layer is looked in step 3.2 determination；
Step 3.3 determination looks for mine destination layer favorably to aoxidize sand coarse aggregate ratio.
7. a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method according to claim 6, it is characterised in that：Step 3.1 exists
On the basis of above-mentioned steps 2 work out sand thickness isopleth map, sand thickness and relationship to uranium ore formation are analyzed, it is thick to establish advantageous sand body
Degree and spatial distribution.
8. a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method according to claim 7, which is characterized in that step 3.2 exists
On the basis of above-mentioned steps 2 work out sand factor isopleth map, sand factor and relationship to uranium ore formation are analyzed, establishes advantageous sand factor and sky
Between be distributed.
9. a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method according to claim 8, which is characterized in that the step
Destination layer oxidation sand coarse aggregate ratio isopleth map is worked out in 3.3.Wherein 0 represents primary Grey Reduction ring in grey detrital deposit construction
Border represents primary Grey Reduction environment in red detrital deposit construction, and represents oil gas and be transformed into primary red build
The reducing environment that grey is built.Analysis oxidation sand coarse aggregate ratio and relationship to uranium ore formation, establish advantageous oxidation sand coarse aggregate ratio and spatial distribution.
10. a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method according to claim 9, it is characterised in that：The step
Rapid 4 include the following steps：
Step 4.1 extracts advantageous information of the geological conditions to U metallogeny；
Step 4.2 extraction boat is put, physical prospecting, is changed in the data such as spy, remote sensing to Uranium Metallogenic Prognosis advantageous information.
11. a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method according to claim 10, it is characterised in that：The step
The advantageous geological conditions of rapid 4.1 extraction includes channel deposit parfacies, destination layer stabling slope band distributed area, destination layer favorab1e sandbadies
The distributed area of thickness, the distributed area of the advantageous sand factor of destination layer, destination layer favorably aoxidize the distributed area of sand coarse aggregate ratio.
12. a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method according to claim 11, it is characterised in that：The step
The advantageous predictive information of rapid 4.2 extraction includes that boat puts uranium enrichment region, mobile uranium enrichment region and uranium loss area, ground radiological survey
U contents exceptions area, control mine fold and the fracture of navigate magnetic and gravity joint interpretation, soil radon measurement exceptional value distributed area.
13. a kind of sandstone-type uranium mineralization with respect Comprehensive Assessment Technology method according to claim 12, it is characterised in that：The step
Rapid 5 will lead to by ArcGIS softwares or MapGIS software realizations at the conversion and extraction of the advantageous geological information of mine and component of forecast
It crosses MRAS softwares and man-machine joint is drawn a circle to approve into mine Favorable Areas, and the Beneficial Ore-forming condition and unfavorable factor of analyzed area, it is final real
Existing objective, accurately and efficiently evaluation region U metallogeny potentiality.
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