Comprehensive geophysical method for sedimentary basin uranium resource exploration
The invention belongs to the field of geophysical exploration methods, and particularly relates to a comprehensive geophysical method for sedimentary basin uranium resource exploration. The method includes the following steps: in a sedimentary basin for uranium resource exploration, utilizing gravity data to delineate basement relief and determine a depression area; in the depression area, performing aeromagnetic measuring to determine favorable uranium mineralization regions; on the basis of the favorable uranium mineralization regions, carrying out three-dimensional seismic exploration, and delineating distribution characteristics, structural characteristics and inversion-series physical parameters of layers containing mine meshes. By the method, a technical means is provided for sedimentary basin uranium resource evaluation, economic risk of sedimentary basin uranium resource exploration is lowered, and exploration cycle is shortened. 1. A sedimentation basin of the uranium resources comprehensive geophys method, comprising the following steps: 1st step, the exploration of the uranium resources in sedimentary basins, information by utilizing gravity, adumbrated substrate fluctuation, determining depression area ; 2nd step, the step of determining in the 1st depression area , in measuring aeromagnetic , favourable in sedimentary basins determining uranium mineralization lot; 3rd step, the favourable uranium mineralization 2nd step of determining on the basis of the lot, to carry out three-dimensional seismic exploration, adumbrated containing ore is spread a, structure and invert series of physical property parameter is. 2. A sedimentation basin of the uranium resources comprehensive geophys method according to Claim 1, characterized in that in the 1st step, information by utilizing gravity, the conditions of the substrate to delineate: gravity information for a scale of 1:200000 to 1:1000000; In the 2nd step, carried out measuring aeromagnetic , determined in sedimentary basins of the conditions of the lot uranium mineralization : aeromagnetic the measuring scale 1:50000 to 1:100000. 3. A sedimentation basin of the uranium resources comprehensive geophys method according to Claim 2, characterized in that in the third step, to carry out three-dimensional seismic exploration, adumbrated containing ore is spread a, structure and invert series of physical property parameter is the conditions of: the earthquake gathering said 500 an integer multiple of, the frequency of the detector -4Hz 40Hz, track pitch 10-25 meters, samplerate 0.25 milliseconds -2.0 milliseconds, record length 1.0 seconds -2.0 seconds, endpoint blasting, 20-40 times covering, bundle 6 line 6 processing to 12 line 12 processing observing system, outlined purpose of containing ore level burying depth 100-1500 meters. 4. A sedimentation basin of the uranium resources comprehensive geophys method according to Claim 2, characterized in that when the base is buried depth less than 500 meters, using 1:200000 information of gravity; when the base is buried deep in the 501 to 1000 meters, using 1:500000 gravity information; greater than the depth of burial when the substrate 1001 m, using 1:1000000 information of gravity; when the base is buried depth less than 500 meters, using 1:50000 information aeromagnetic ; when the base is buried deep in the 501 to 1000 meters and the base the burying depth greater than 1000 meters, using 1:100000 aeromagnetic information. 5. A sedimentation basin of the uranium resources comprehensive geophys method according to Claim 3, characterized in that when the detection of deeply buried interface 100 to 500 meters, earthquake gathering said to 500 channels, the detector frequency 40Hz, track pitch 10 meters, samplerate 0.25 milliseconds, record length 1.0 seconds, endpoint blasting, 20 time covering, bundle 6 line 6 the field measurement processing observation system; when the to be detection of deeply buried interface 501 meters to 1000 meters, earthquake gathering said to 1000 channel, the detector frequency 10Hz, track pitch 20 meters, samplerate 1.0 milliseconds, record length 2.0 seconds, endpoint blasting, 30 times covering, bundle 8 line 8 the field measurement processing observation system; when the embedded depth of the interface to be surveyed more than 1001 m, earthquake gathering said to 1500 channel, the detector frequency 4Hz, track pitch 25 meters, samplerate 2.0 milliseconds, record length 2.0 seconds, endpoint blasting, 40 times covering, bundle 12 line 12 processing observing system.