Numerical Simulation Study on the Relationships between Mineralized Structures and Induced Polarization Properties of Seafloor Polymetallic Sulfide Rocks

The induced polarization (IP) method plays an important role in the detection of seafloor polymetallic sulfide deposits. Numerical simulations based on the Poisson–Nernst–Planck equation and the Maxwell equation were performed. The effects of mineralized structures on the IP and electrical conductiv...

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Bibliographic Details
Published in:Minerals (Basel) 2022-09, Vol.12 (9), p.1172
Main Authors: Wu, Caowei, Zou, Changchun, Peng, Cheng, Liu, Yang, Wu, Tao, Zhou, Jianping, Tao, Chunhui
Format: Article
Language:English
Subjects:
Aspect ratio
Constants
Electric fields
Electrical conductivity
Electrical resistivity
Induced polarization
Investigations
Laboratories
Mathematical models
Maxwell's equations
Metal sulfides
Metals
Mineralization
mineralized structures
Minerals
numerical simulation
Ocean floor
Poisson–Nernst–Planck equation
Polarization
Pore water
Porous materials
Ratios
Relaxation time
Rocks
seafloor polymetallic sulfide
Simulation
Sulfides
Sulphides
Surveying
Tortuosity
Veins (geology)
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Summary:The induced polarization (IP) method plays an important role in the detection of seafloor polymetallic sulfide deposits. Numerical simulations based on the Poisson–Nernst–Planck equation and the Maxwell equation were performed. The effects of mineralized structures on the IP and electrical conductivity properties of seafloor sulfide-bearing rocks were investigated. The results show that total chargeability increases linearly as the volume content of disseminated metal sulfides increases when the volume content is below 20%. However, total chargeability increases nonlinearly with increasing volume content in vein and massive metal sulfides when the volume content is below 30%. The electrical resistivity of disseminated metal sulfides mainly depends on the conductivity of pore water. The electrical resistivity of vein and massive sulfides mainly depends on the volume content and the length of sulfides. Increase in the aspect ratio (0.36 to 0.93) of seafloor massive sulfides causes relaxation time constants and total chargeability to decrease. Relaxation time constants and total chargeability also decrease with increase in the tortuosity of seafloor vein sulfides from 1.0 to 1.38. This study is of great value for the electrical survey of seafloor polymetallic sulfide deposits.
ISSN:2075-163X
2075-163X
DOI:10.3390/min12091172