A method for exploring heavy mineral sand resources in shallow sea and related equipment

By collecting passive source micromotion data in shallow sea heavy mineral placer exploration, constructing spectral ratio curves and inverting bedrock surface depth, and combining geological model analysis, the problem of difficulty in balancing exploration depth and resolution in existing technologies has been solved, achieving high-precision resource potential assessment.

CN122151196APending Publication Date: 2026-06-05GUANGZHOU MARINE GEOLOGICAL SURVEY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGZHOU MARINE GEOLOGICAL SURVEY
Filing Date
2026-02-02
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies face challenges in shallow sea heavy mineral placer exploration, including interference with data quality due to complex sea conditions, difficulty in balancing detection depth and resolution, insufficient penetration capability of shallow stratigraphic profiles, limited ability of single-channel seismic analysis to identify thin or deep sand bodies, severe ambiguity in sand-mud interface identification, and difficulty in characterizing three-dimensional morphology under sparse boreholes, resulting in low accuracy in resource assessment.

Method used

By acquiring preliminary research data, passive source micromotion data were collected using a submarine seismograph, and horizontal and vertical spectral ratio curves were constructed for spectral separation to obtain the low-frequency curve of the bedrock resonance peak. A paleotopographic map was constructed by combining the bedrock surface depth inversion and then overlaid with a regional geological model to assess the potential of heavy mineral resources.

Benefits of technology

It effectively overcomes the shortcomings of existing technologies, utilizes natural field sources to adapt to complex coastal and shallow marine environments, penetrates deep interfaces, reveals paleogeomorphic units, and improves the targeting of exploration and the accuracy of resource potential assessment.

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Abstract

The application discloses a shallow sea heavy mineral sand mine resource exploration method and related equipment, and the method comprises the following steps: obtaining pre-research data of a target shallow sea area, predicting an exploration scheme based on the pre-research data, and arranging a bottom seismograph in the target shallow sea area based on the exploration scheme; collecting passive source micro-motion data by using the bottom seismograph, and extracting original data from the passive source micro-motion data based on a preset data quality standard; constructing a horizontal and vertical spectral ratio curve based on the original data, performing frequency spectrum separation on the horizontal and vertical spectral ratio curve, and obtaining a low-frequency curve of a bedrock resonance peak; constructing a palaeotopographic map through bedrock surface depth inversion based on the low-frequency curve; obtaining a regional geological model of the target shallow sea area, superimposing and analyzing the palaeotopographic map and the regional geological model, and obtaining an evaluation result of heavy sand mine resource potential. The application can effectively improve the exploration directivity and the accuracy of resource potential evaluation by identifying the change of ore-controlling landforms, and can be widely applied to the technical field of data processing.
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