Fault-Fold Stress Mapping for Deep Hydrothermal Deposit Targets
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Solution Overview
Problem
The challenge of accurately predicting and localizing deep hydrothermal deposits controlled by fault-fold structures is hindered by unclear mechanical mechanisms of ore-forming processes, complex ore-controlling factors, and interference from humanistic and geological factors, which complicates geophysical and chemical prospecting and increases exploration costs.
Innovation Solution
A target delineation method utilizing Orefield Geomechanics principles to analyze geometric, kinematic, and mechanical characteristics of fault-fold structures, identify ore-controlling patterns, and determine stress transformation regions as favorable ore-forming zones, guiding deep prospecting and reducing verification costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If geophysical exploration is used for deep prospecting, then the coverage area increases, but the resolution decreases and anomaly analysis becomes difficult
Solution Approach 1:
The patent divides the exploration process into multiple stages: first using geophysical exploration for broad coverage, then applying structural analysis methods to segment and prioritize specific target areas, and finally using drilling for verification. This segmentation allows the system to maintain both wide coverage and high precision in critical areas.
Solution Approach 2:
The patent introduces structural analysis as an intermediary method between geophysical exploration and drilling. By analyzing fault-fold structures and stress fields, it translates vague geophysical anomalies into specific, testable predictions about orebody locations, improving the effectiveness of subsequent drilling operations.
2Measurement precision
If drilling exploration is used to verify deep deposits, then the verification accuracy increases, but the exploration cost increases
Solution Approach 1:
The patent performs preliminary structural analysis and stress field calculations before conducting drilling operations. By identifying favorable ore-forming zones through theoretical analysis of fault-fold structures and stress transformation regions, it pre-screens potential targets, ensuring that drilling resources are concentrated only on the most promising locations.
Solution Approach 2:
The patent changes the approach from direct drilling verification to a multi-parameter analysis system that incorporates structural geometry, kinematic characteristics, stress field distribution, and ore-controlling patterns. This allows for accurate target prediction without immediate drilling, reducing the number of expensive exploratory holes needed.
3Measurement precision
If comprehensive structural analysis is performed to identify ore-controlling patterns, then the target prediction accuracy improves, but the analysis complexity increases
Solution Approach 1:
The patent segments the complex structural analysis into hierarchical levels: deposit-scale fault-fold structures, orebody-scale structural patterns, and vein-scale controlling factors. This segmentation allows analysts to systematically address each level without being overwhelmed by the overall complexity.
Solution Approach 2:
The patent develops a universal analytical framework based on fault-fold structure theory that can be applied across different deposit types and scales. By identifying general principles of ore-controlling structures and stress fields, the method provides a multi-functional approach that simplifies analysis while maintaining accuracy across diverse geological settings.
Data Source
AI summary
Provided is a target delineation method for deep prospecting of a hydrothermal deposit controlled by a fault-fold structure, including: analyzing an echelon distribution of orebodies or mineralized bodies, and analyzing a mechanical mechanism of the ore-forming structure; determining a trend and a plunge of an overall principal compressive stress of the mining area, as well as trends and plunges of local principal compressive stresses at different locations of an anticline; revealing a control effect of the local principal compressive stress on formation of an ore-bearing space and on a spatial distribution of orebody groups; and determining a stress transformation region controlled by the deposit structure as a favorable ore-forming zone of the deposit, and determining a stress transformation region controlled by an orebody structure in the favorable ore-forming zone as a target position for deep concealed orebodies.