CN106501871A - A kind of paleo-channel type uranium ore detection method - Google Patents

A kind of paleo-channel type uranium ore detection method Download PDF

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CN106501871A
CN106501871A CN201610825051.7A CN201610825051A CN106501871A CN 106501871 A CN106501871 A CN 106501871A CN 201610825051 A CN201610825051 A CN 201610825051A CN 106501871 A CN106501871 A CN 106501871A
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rock core
ancient
valley
uranium
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彭云彪
陈霜
陈安平
杨建新
康世虎
申科峰
鲁超
刘璐
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CNNC 208 BATTALION
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    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Abstract

The present invention relates to sandstone-type uranium mineralization with respect geologic prospect technical field, specifically discloses a kind of paleo-channel type uranium ore detection method.The method comprises the steps:1st, field rock core is edited and recorded, and is edited and recorded by geology, physical prospecting, the hydrology, obtains ancient valley Sandstone Cores feature, draws drilling composite columnar section;2nd, by sampling to rock core, and geology, physical prospecting sample analysis are carried out, obtains ancient valley sandstone rock core mineral characteristic;3rd, ancient valley plan and profile is drawn, and is edited and recorded according to borehole data and rock core, divide ancient valley sand body layer position;4th, according to ancient valley sand body layer position, oxide regions and reduced zone is divided, the front of the oxidation zone line of oxidized zone and zone of reduction interface is determined, by drilling recourse, verification, analysis delineation uranium ore body;The detection method, can effectively judge paleo-channel type Uranium Deposits environment, carry out the division of ancient valley sand body, draw a circle to approve preferable ore-finding area, provide technical method and foundation for paleo-channel type Prospecting For Uranium.

Description

A kind of paleo-channel type uranium ore detection method
Technical field
The invention belongs to sandstone-type uranium mineralization with respect geologic prospect technical field, and in particular to a kind of paleo-channel type uranium ore detection side Method.
Background technology
Paleo-channel type uranium ore is the important kind of northern SANDSTONE URANIUM DEPOSITS, when the lithology, petrofacies when continental basins is changed greatly, It is to be hardly formed traditional regional interlayer oxidized zone, and the ancient valley sand body controlled by basin basal structure is very important , explore paleo-channel type Prospecting For Uranium technology, it has also become one of important range of reconnaissance.As the type uranium formation reason is received Ancient valley sand body and the control of ore-forming setting, and because often changing its course intersection in riverbed, along with northern each sedimentary basin forms original Because differing, this just increases the difficulty of detection.In conventional work, paleo-channel type Prospecting For Uranium method is few, on the whole effect Less substantially, less efficient, relatively costly, and the genesis of ore bodies and ore-forming setting for being difficult to find out the type uranium ore, it is difficult to Technically there is certain breakthrough.Therefore, by finding ancient valley sand body, progressively explore diving-interlevel oxidation and bring breakthrough uranium ore It is a good range of reconnaissance to look for ore deposit technology.
Paleo-channel type uranium ore belongs to the category of sandstone-type uranium mineralization with respect, refers to a kind of external rear raw uranium originated in ancient valley sedimentary Mineral deposit, mainly acted on by phreatic oxidation or dived under water-interlayer oxidation enrichment forms, its uranium mineralization process is depended on as ancient Useful effect of the hydrodynamic system to river valley, these ancient paddy soil systems determine during subsurface flow direction, oxygen-containingly Uranium in lower water is enriched with permeable rock stratum.In the middle part of Er'lian Basin, paleo-channel type uranium mineralization mainly originates in fluvial deposit and three In the sedimentary sand bodies of angle continent.By the research to basin-mountain frame work, uranium source environment, sedimentary origin, river course form and scale, can be by Step explores the formation of ancient valley, reviews the enrichment of ore-forming of uranium.
Content of the invention
It is an object of the invention to provide a kind of paleo-channel type uranium ore detection method, which can pass through to analyze ancient valley molding sand The microcosmic of rock uranium ore, gross feature, effectively judge the ore-forming setting of ancient valley uranium ore, carry out looking for ore deposit and surveying for sandstone-type uranium mineralization with respect Look into.
Technical scheme is as follows:A kind of paleo-channel type uranium ore detection method, the method specifically include following steps:
Step 1, field rock core are edited and recorded, and are edited and recorded by geology, physical prospecting, the hydrology, obtain ancient valley Sandstone Cores feature, are drawn and are bored Hole composite columnar section;
During rock core is edited and recorded in the wild, geological analysis are carried out to the rock core obtained by ancient valley sand body, including color point Analysis, elemental analysis;According to the lithology, color and material composition that are obtained, log sheet is drawn;By physical prospecting, water Text is edited and recorded, and obtains gamma-radiation value and the hydrogeological characteristics of rock core;
Step 2, by sampling to rock core, and carry out geology, physical prospecting sample analysis, obtain ancient valley sandstone rock core ore deposit Thing feature;
Geology, physical prospecting rock core are sampled, through the analysis test of targetedly rock core, analysis test result is carried out Contrast, obtains ancient valley oxidized zone and zone of reduction mineral characteristic;
Step 3, the firsthand information information obtained by step 1, step 2, draw ancient valley plan and profile, and Edited and recorded according to borehole data and rock core, divide ancient valley sand body layer position;
Step 4, according to ancient valley sand body layer position, with reference to step 1, the obtained rock core of step 2, mineral, geophysical information, In conjunction with composite columnar section, oxide regions and reduced zone is divided, the front of the oxidation zone line of oxidized zone and zone of reduction interface is determined, By drilling recourse, verification, analysis delineation uranium ore body.
In described step 1, the color of ancient valley sand body rock core is different for oxidized form sand body and reduced form sand body are presented Color, wherein, for oxidized form sand body is in green or light green color, for reduced form sand body assumes canescence or grey.
In described step 1 in ancient valley sand body rock core, oxidized form sand body contains more limonite and kaolin, for Reduced form sand body contains more pyrite and organic matter.
Ancient valley sandstone rock core mineral characteristic is obtained in described step 2 further includes following steps:
Step 2.1, acquisition ancient valley oxidized zone and zone of reduction rock forming mineral attribute;
Detect that ancient valley oxidized zone shows as oxide yellow by analysis;Strong oxdiative rock is in yellow, light yellow or yellowish green Color, development ferritization or hematization;Weak oxide rock is white, canescence or light gray, and develops in rock a large amount of Star spot shape, ribbon ferritization spot.
Ancient valley sandstone rock core mineral characteristic is obtained in described step 2 further includes following steps:
Step 2.2, acquisition ancient valley Geochemical Characteristics;
Successively from after the primary red rock geochemical type of oxidized zone, oxidized zone raw yellow petrogeochemistry type, Weak oxide band canescence petrogeochemistry type, zone of reduction grey rock geochemical type to redox zone, this The rock of five types gradually increases than current potential, and intermediate zone grey or Dark grey sandstone have stronger reduced form;Oxidized zone sandstone Middle agensis pyrite is more containing pyrite in zone of reduction gray post ore;Fe in oxidized zone3+、ω(Fe2O3) content height, Fe in zone of reduction2+, ω (FeO) content high;ω(Fe2O3)/ω (FeO) ratio is bigger, illustrates that oxidability is stronger.
Ancient valley sandstone rock core mineral characteristic is obtained in described step 2 further includes following steps:
Step 2.3, acquisition ancient valley geophysical character;
The distribution for reflecting original rich uranium geologic body/layer using the distributed area that gamma is abnormal and thorium is extremely dizzy;Using uranium, Charcoal absorption radon measurement and the abnormal dizzy distribution reflection of polonium method measurement have the geologic body/layer of uranium pre-enrichment effect, including rock Slurry point is different, rotten and deposition preenrichment is acted on;Directly reflect the migratory direction of uranium element using mobile uranium High-Field of moving into.
Ancient valley sandstone rock core mineral characteristic is obtained in described step 2 further includes following steps:
Step 2.4, acquisition ancient valley hydrogeological characteristics;
Ancient paddy soil circulative metabolism is the necessary requirement that oxygen-containing uranium containing water is able to continuously unload enriched uranium;As ground The fluvial sandstone in the enrichment place of lower water migration pathway and uranium ore, determines ground together with the conditions such as Basin Tectonic, sedimentary evolution Benefit-the Jing of lower water-row's mechanism;Underground water is lost after source region or the supply of local eminence area from basin, penetrates into Furukawa from different directions Paddy, turned round by river course, broadened, breaks location excretion;
Described step 3 is specifically included:
According to rock core geologic feature and the synthetic column map analysis of drilling, with reference to geophysical logging curve, comprehensive to Gu River valley sand body layer position is divided, wherein, with reference to geophysical logging curve include gamma curve, apparent resistivity curve, density curve, Sound wave curve.
The remarkable result of the present invention is:A kind of paleo-channel type uranium ore detection method of the present invention, effectively can sentence Disconnected paleo-channel type Uranium Deposits environment, carries out the division of ancient valley sand body, draws a circle to approve preferable ore-finding area, is that paleo-channel type uranium ore is looked for Ore deposit provides technical method and foundation;The present invention can be widely applied to Prospecting Sandstone-type Uranium Deposits and reconnoitre, with it, Er'lian Basin achieves huge exploration breakthrough.It is found that in succession Bayan crow drawing, hada figure are large-scale, match Henkel finishes medium-sized uranium deposit With the preferable uranium ore place of production of a collection of potentiality, make two companies have evolved into one of important uranium resource base of China, be that China's nuclear energy is opened Send out and national defense construction provides sufficient resource reserve force.2016, with the method, have found in hada figure mineral deposit and be so far Only most rich industrial uranium ore hole (square meter uranium amount 63.77kg/m of Er'lian Basin2).
Specific embodiment
A kind of paleo-channel type uranium ore detection method, the method specifically include following steps:
Step 1, field rock core are edited and recorded, and are edited and recorded by geology, physical prospecting, the hydrology, obtain ancient valley Sandstone Cores feature, are drawn and are bored Hole composite columnar section;
During rock core is edited and recorded in the wild, geological analysis are carried out to the rock core obtained by ancient valley sand body, including color point Analysis, elemental analysis;According to the lithology, color and material composition that are obtained, log sheet is drawn;By physical prospecting, water Text is edited and recorded, and obtains gamma-radiation value and the hydrogeological characteristics of rock core;
The color of ancient valley sand body rock core assumes different colors for oxidized form sand body and reduced form sand body, wherein, right In oxidized form sand body in green or light green color, for reduced form sand body assumes canescence or grey;For ancient valley sand body rock core Elemental analysis for, oxidized form sand body contains more limonite and kaolin, for reduced form sand body contain more Pyrite and organic matter;
Step 2, by sampling to rock core, and carry out geology, physical prospecting sample analysis, obtain ancient valley sandstone rock core ore deposit Thing feature;
Geology, physical prospecting rock core are sampled, through the analysis test of targetedly rock core, analysis test result is carried out Contrast, obtains ancient valley oxidized zone and zone of reduction mineral characteristic;
Step 2.1, acquisition ancient valley oxidized zone and zone of reduction rock forming mineral attribute;
Detect that ancient valley oxidized zone shows as oxide yellow by analysis;Strong oxdiative rock is in yellow, light yellow or yellowish green Color, development ferritization or hematization;Weak oxide rock is white, canescence or light gray, and develops in rock a large amount of Star spot shape, ribbon ferritization spot;
Ancient valley zone of reduction rock gray or Dark grey, often containing carbonate plant chip or pyrite;
Step 2.2, acquisition ancient valley Geochemical Characteristics;
Successively from after the primary red rock geochemical type of oxidized zone, oxidized zone raw yellow petrogeochemistry type, Weak oxide band canescence petrogeochemistry type, zone of reduction grey rock geochemical type to redox zone, this The rock of five types gradually increases than current potential, and intermediate zone grey or Dark grey sandstone have stronger reduced form;Oxidized zone sandstone Middle agensis pyrite is more containing pyrite in zone of reduction gray post ore;Fe in oxidized zone3+、ω(Fe2O3) content height, Fe in zone of reduction2+, ω (FeO) content high;ω(Fe2O3)/ω (FeO) ratio is bigger, illustrates that oxidability is stronger;
Step 2.3, acquisition ancient valley geophysical character;
The distribution for reflecting original rich uranium geologic body/layer using the distributed area that gamma is abnormal and thorium is extremely dizzy;Using uranium, Charcoal absorption radon measurement and the abnormal dizzy distribution reflection of polonium method measurement have the geologic body/layer of uranium pre-enrichment effect, including rock Slurry point is different, rotten and deposition preenrichment is acted on;Directly reflect the migratory direction of uranium element using mobile uranium High-Field of moving into;
Step 2.4, acquisition ancient valley hydrogeological characteristics;
Ancient paddy soil circulative metabolism is the necessary requirement that oxygen-containing uranium containing water is able to continuously unload enriched uranium;As ground The fluvial sandstone in the enrichment place of lower water migration pathway and uranium ore, determines ground together with the conditions such as Basin Tectonic, sedimentary evolution Benefit-the Jing of lower water-row's mechanism;Underground water is lost after source region or the supply of local eminence area from basin, penetrates into Furukawa from different directions Paddy, turned round by river course, broadened, breaks location excretion;
Step 3, the firsthand information information obtained by step 1, step 2, draw ancient valley plan and profile, and Edited and recorded according to borehole data and rock core, divide ancient valley sand body layer position;
According to rock core geologic feature and the synthetic column map analysis of drilling, with reference to geophysical logging curve, comprehensive to Gu River valley sand body layer position is divided, wherein, with reference to geophysical logging curve include gamma curve, apparent resistivity curve, density curve, Sound wave curve;
For the paleo-channel type uranium deposit of Er'lian Basin, the resistivity of its mud stone, density are minimum, gamma-irradiation dose rate, sound Fast time difference highest, as the increase of clast granularity, resistivity and density also gradually increase, and gamma-irradiation dose rate gradually drops Low;Gravitational field is total to be characterized in that anomaly area is narrow and small, and quantity is various, and distortion is substantially, axially based on east northeast, abnormal more with intensive Band is boundary;The total variation tendency of electrical property feature is that earth's surface is high, and Neogene System, Paleogene System and Cretaceous System are low, with igneous rock, metamorphic rock electricity Resistance rate highest;In Cretaceous System, shale resistivity is low, and sand paper mud stone, argillaceous sandstone, sand-mud interbed resistivity are medium, sandstone, gravel Rock, chiltern conglomerate or coal seam resistivity are higher;According to mud stone, the parameters feature of sandstone, mud stone and sand layers position is divided;
Step 4, according to ancient valley sand body layer position, with reference to step 1, the obtained rock core of step 2, mineral, geophysical information, In conjunction with composite columnar section, oxide regions and reduced zone is divided, the front of the oxidation zone line of oxidized zone and zone of reduction interface is determined, By drilling recourse, verification, analysis delineation uranium ore body;
Using ancient valley plan and profile, according to the position of sand body in step 3, target zone sand body is carried out lithology, Color, physical property characteristic analysis, obtain oxidation sand body and reduction sand body;Oxide regions and reduced zone is divided, diving-interlayer is delineated Front of the oxidation zone line, originates near the front forward line of diving-interlayer oxidized zone uranium ore body more.

Claims (8)

1. a kind of paleo-channel type uranium ore detection method, it is characterised in that:The method specifically includes following steps:
Step 1, field rock core are edited and recorded, and are edited and recorded by geology, physical prospecting, the hydrology, obtain ancient valley Sandstone Cores feature, draw drilling comprehensive Close block diagram;
During rock core is edited and recorded in the wild, geological analysis are carried out to the rock core obtained by ancient valley sand body, including color analysis, thing Matter constituent analysis;According to the lithology, color and material composition that are obtained, log sheet is drawn;Compiled by physical prospecting, the hydrology Record, obtains gamma-radiation value and the hydrogeological characteristics of rock core;
Step 2, step 2, by sampling to rock core, and carry out geology, physical prospecting sample analysis, obtain ancient valley sandstone rock core Mineral characteristic;
Geology, physical prospecting rock core are sampled, through the analysis test of targetedly rock core, it is right that analysis test result is carried out Than obtaining ancient valley oxidized zone and zone of reduction mineral characteristic;
Step 3, the firsthand information information obtained by step 1, step 2, drafting ancient valley plan and profile, and according to Borehole data and rock core are edited and recorded, and divide ancient valley sand body layer position;
Step 4, according to ancient valley sand body layer position, with reference to step 1, the obtained rock core of step 2, mineral, geophysical information, in conjunction with Composite columnar section, divides oxide regions and reduced zone, determines the front of the oxidation zone line of oxidized zone and zone of reduction interface, pass through Probing recourse, verification, analysis delineation uranium ore body.
2. a kind of paleo-channel type uranium ore detection method according to claim 1, it is characterised in that:Described step 1 middle ancient times The color of river valley sand body rock core assumes different colors for oxidized form sand body and reduced form sand body, wherein, for oxidation molding sand Body is in green or light green color, for reduced form sand body assumes canescence or grey.
3. a kind of paleo-channel type uranium ore detection method according to claim 1, it is characterised in that:Described step 1 middle ancient times In river valley sand body rock core, oxidized form sand body contains more limonite and kaolin, for reduced form sand body contains more Huang Iron ore and organic matter.
4. a kind of paleo-channel type uranium ore detection method according to claim 1, it is characterised in that:Obtain in described step 2 Obtain ancient valley sandstone rock core mineral characteristic and further include following steps:
Step 2.1, acquisition ancient valley oxidized zone and zone of reduction rock forming mineral attribute;
Detect that ancient valley oxidized zone shows as oxide yellow by analysis;Strong oxdiative rock be in yellow, light yellow or yellow green, Development ferritization or hematization;Weak oxide rock is white, canescence or light gray, and develops a large amount of asterisms in rock Shape, ribbon ferritization spot.
5. a kind of paleo-channel type uranium ore detection method according to claim 1, it is characterised in that:Obtain in described step 2 Obtain ancient valley sandstone rock core mineral characteristic and further include following steps:
Step 2.2, acquisition ancient valley Geochemical Characteristics;
Yellow petrogeochemistry type, weak oxygen are given birth to from after the primary red rock geochemical type of oxidized zone, oxidized zone successively Change band canescence petrogeochemistry type, zone of reduction grey rock geochemical type to redox zone, this five kinds The rock of type gradually increases than current potential, and intermediate zone grey or Dark grey sandstone have stronger reduced form;In oxidized zone sandstone not Development pyrite is more containing pyrite in zone of reduction gray post ore;Fe in oxidized zone3+、ω(Fe2O3) content is high, reduction Fe in band2+, ω (FeO) content high;ω(Fe2O3)/ω (FeO) ratio is bigger, illustrates that oxidability is stronger.
6. a kind of paleo-channel type uranium ore detection method according to claim 1, it is characterised in that:Obtain in described step 2 Obtain ancient valley sandstone rock core mineral characteristic and further include following steps:
Step 2.3, acquisition ancient valley geophysical character;
The distribution for reflecting original rich uranium geologic body/layer using the distributed area that gamma is abnormal and thorium is extremely dizzy;Using uranium, activity Charcoal absorption radon measurement and the abnormal dizzy distribution reflection of polonium method measurement have the geologic body/layer of uranium pre-enrichment effect, including magma point Different, rotten and deposition preenrichment effect;Directly reflect the migratory direction of uranium element using mobile uranium High-Field of moving into.
7. a kind of paleo-channel type uranium ore detection method according to claim 1, it is characterised in that:Obtain in described step 2 Obtain ancient valley sandstone rock core mineral characteristic and further include following steps:
Step 2.4, acquisition ancient valley hydrogeological characteristics;
Ancient paddy soil circulative metabolism is the necessary requirement that oxygen-containing uranium containing water is able to continuously unload enriched uranium;As underground water The fluvial sandstone in the enrichment place of migration pathway and uranium ore, determines underground water together with the conditions such as Basin Tectonic, sedimentary evolution Benefit-Jing-row's mechanism;Underground water is lost after source region or the supply of local eminence area from basin, is penetrated into ancient valley from different directions, is led to Cross river course turn round, broaden, breaks location excretion.
8. a kind of paleo-channel type uranium ore detection method according to claim 1, it is characterised in that:Described step 3 is concrete Including:
According to rock core geologic feature and the synthetic column map analysis of drilling, with reference to geophysical logging curve, comprehensive to ancient valley Sand body layer position is divided, and wherein, includes gamma curve, apparent resistivity curve, density curve, sound wave with reference to geophysical logging curve Curve.
CN201610825051.7A 2016-09-14 2016-09-14 A kind of paleo-channel type uranium ore detection method Pending CN106501871A (en)

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CN112580119A (en) * 2020-11-20 2021-03-30 核工业二〇八大队 Method for compiling geological map of in-situ leaching sandstone type uranium ore series
CN112580119B (en) * 2020-11-20 2023-03-17 核工业二〇八大队 Method for compiling geological map of in-situ leaching sandstone type uranium ore series
CN113049783A (en) * 2021-03-23 2021-06-29 中国地质调查局南京地质调查中心(华东地质科技创新中心) Geological data acquisition method
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