The analysis of sanshan island based on constrained magnetization vector inversion

Area of Science:

• Geophysics
• Economic Geology
• Mineral Exploration

Background:

• Gold ores are crucial strategic resources in China, with Sanshan Island being a key gold-producing area.
• Magmatic activity and extensive fracture networks are vital for gold transport and enrichment in the Sanshan Island area.
• Accurate mapping of fractures and intrusive rocks is essential for effective gold exploration.

Purpose of the Study:

• To develop and apply a novel inversion method for high-resolution delineation of geological structures related to gold mineralization.
• To utilize the Power-type structural self-constrained magnetization vector (PTSS-MV) inversion method for improved accuracy in portraying fractures and intrusive rocks.
• To analyze the relationship between delineated geological structures and gold mineralization in the Sanshan Island area.

Main Methods:

• Development of the Power-type structural self-constrained magnetization vector (PTSS-MV) inversion method, incorporating self-constraint for enhanced resolution.
• Application of the PTSS-MV method to magnetic vector inversion data from the Sanshan Island area.
• Validation of the method's accuracy using volume ratio calculations under varying buried depth models, showing a 15% increase.

Main Results:

• The PTSS-MV inversion method successfully delineated fractures and intrusive rock distributions with clearer boundaries.
• High magnetization intensity bodies were identified near fractures, with edges and tectonic intersections proving favorable for gold mineralization.
• The method demonstrated robustness, providing accurate results even with the influence of remanent magnetization.

Conclusions:

• The PTSS-MV inversion method is effective for high-resolution geophysical interpretation in mineral exploration.
• The study identified four favorable areas for deep gold mineralization in the Sanshan Island region.
• This research provides valuable data for guiding future mineral exploration and resource assessment.