Detection method for identifying concealed fracture structure of hydrothermal uranium deposit

Abstract

The invention belongs to the technical field of hydrothermal uranium ore geological exploration, and particularly relates to a detection method for identifying concealed fracture structure of a hydrothermal uranium deposit. The detection method comprises the following steps of: step 1, carrying out measurement by adopting four measurement methods of gravity, ground high-precision magnetic measurement, ground gamma-ray energy spectrum and soil radon gas in a hydrothermal uranium resource exploration region; step 2, performing upward continuation on gravity data in the step 1, and solving a vertical-horizontal first-order derivative DZG; step 3, performing reduction-to-pole on the magnetic data in the step 1, and solving a vertical first-order derivative processing DZM; step 4, calculating an average value and a mean square error of the uranium content of the ground gamma-ray energy spectra and the soil radon gas concentration obtained in the step 1; step 5, calculating an information contrast value of ground gamma-ray spectrum measurement and soil radon gas instantaneous measurement data; and step 6, deducing and interpreting a concealed fracture structure. According to the detection method, information and features of the concealed fracture structure can be precisely identified.

Description

Technical field [0001] The invention belongs to the technical field of geological exploration of hydrothermal uranium deposits, and particularly relates to a detection method for identifying hidden fracture structures of hydrothermal uranium deposits. Background technique [0002] Hydrothermal uranium deposits refer to useful mineral deposits formed by ore-forming methods such as filling, metasomatism, and sedimentation in various favorable structures and rock bodies under certain physical and chemical conditions. Including granite-type and volcanic-type uranium deposits, it is the main industrial type in my country. Uranium deposits are generally located in the outer contact zone or faulted structure of the rock mass. At present, fault structures that are exposed to the surface and are shallower buried for geological traceability have been discovered. Searching for deep concealed fault structures has become one of the main problems facing uranium geologists. The problem of conc...

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Problems solved by technology

Ground-based gamma-ray spectroscopy mainly reflects the radioactive characteristics of the shallow surface, and single use can no longer meet the needs of deep uranium ore prospecting. Although the detection depth of radon and its progeny measurement method is greater than that of gamma-ray spectroscopy, but Because it is easily affected by factors such as landform and climate, its practical application effect is also ambiguous.

[0004] In the previous work of fault structure deduction and interpretation, there was no comprehensive consideration and analysis. For the exploration of hidden fault structures in hydrothermal uranium deposits, it is necessary to combine several typical and effective identification and detection technologies to establish more accurate hidden faults. structure recognition method

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