A quantitative evaluation method and system for the relationship between shear zone deformation and mineralization based on magnetic fabric

Abstract

The present invention relates to the field of mineral exploration and prospecting technology, specifically to a quantitative evaluation method and system for the relationship between shear zone deformation and mineralization based on magnetic fabric. The invention systematically compares the differences in magnetic fabric parameters between ore-bearing and non-ore-bearing mylonites, revealing that the magnetic susceptibility intensity (e.g., Km greater than 1000 micro-SI) and the degree of anisotropy of magnetic susceptibility (e.g., Pj greater than 1.5) are key indicators of mineralizing fluids. The significant increase in the Km value in ore-bearing mylonites is attributed to the directional enrichment of magnetite / hematite induced by hydrothermal activities during the mineralization period, and the degree of enrichment directly reflects the fluid permeation-precipitation efficiency. The invention quantitatively evaluates the deformation intensity of shear zones and the potential for mineralization through anisotropy of magnetic susceptibility parameters (Km, Pj, T), and combines a three-dimensional magnetic fabric model with rock magnetism screening to achieve intelligent classification of ore-bearing properties and prediction of deep ore bodies, breaking through the limitations of traditional qualitative analysis.

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