Effective-Medium Inversion of Induced Polarization Data for Mineral Exploration and Mineral Discrimination: Case Study for the Copper Deposit in Mongolia

Multifunctional electromagnetic prospecting technology, include the time domain induced polarization (TDIP), the artificial source phase induced polarization(RPIP), the natural field audio magnetotelluric sounding(AMT), Controlled source audio magnetotelluric sounding(CSAMT),etc. They form a kind of multi-parameter electromagnetic prospecting technology from shallow to deep. The method have characteristics such as high-resolution, diversified-means, bigger-detection-depth etc, can obtain the electrical parameters of apparent resistivity, apparent polarization, phase, so it can reflect the electrical characteristics of the geological structure and rock & ore to provide information for deep or concealed mine. This overview just summarized achievements made in methods and techniques, basic principles, technical characteristics, applications cope and conditions, case study and results, in hope of giving some guidance for metallic ore exploration.

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Application of the singularity mapping technique to identify local anomalies by polarization data (a case study: Hamyj Copper Deposit, Iran)

Acta Geodaetica et Geophysica ◽

10.1007/s40328-015-0112-x ◽

2015 ◽

Vol 50 (3) ◽

pp. 365-374 ◽

Cited By ~ 1

Author(s):

Mohammad Shahi Ferdows ◽

Hamid Reza Ramazi

Keyword(s):

Copper Deposit ◽

Mapping Technique ◽

Polarization Data ◽

Local Anomalies

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The Application of Resistivity and Induced Polarization Methods in Identification of Skarn Alteration Haloes: A Case Study in the Qale-Alimoradkhan Area

Journal of Environmental and Engineering Geophysics ◽

10.2113/jeeg23.3.363 ◽

2018 ◽

Vol 23 (3) ◽

pp. 363-368 ◽

Cited By ~ 2

Author(s):

Seyyed Reza Mashhadi ◽

Hamidreza Ramazi

Keyword(s):

Copper Deposit ◽

Induced Polarization ◽

High Resistivity ◽

Resistivity Sounding ◽

Geological Features ◽

Intrusive Rocks ◽

Hamedan Province ◽

Selection Of ◽

Good Agreement

This paper investigates the capability of the resistivity and induced polarization (IP) methods to delineate skarn alteration haloes within the Qale-Alimoradkhan skarn copper deposit. This deposit is located in the Sanandaj-Sirjan geological and structural zone, Hamedan province, Iran. It is understood that fresh limestone and metamorphosed limy units including skarns represent high resistivity anomalies whereas granodiorite intrusions represent medium to low resistivity responses. Four profiles were selected to explore the sulfide-rich zones within the deposit using the Combined Resistivity Sounding and Profiling (CRSP) array. After the appropriate selection of inversion parameters, the inverted models were in good agreement with the known geological features. The resistivity response of the intrusive rocks were found to be alteration dependent. Furthermore, IP targets likely represent sulfide-rich zones. Our study suggests that if preexisting knowledge regarding the geological setting is available, then resistivity and IP can be helpful in the exploration of skarn mineralization.

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Mapping of landfills using time-domain spectral induced polarization data: the Eskelund case study

Near Surface Geophysics ◽

10.3997/1873-0604.2012046 ◽

2012 ◽

Vol 10 (6) ◽

pp. 575-586 ◽

Cited By ~ 45

Author(s):

A. Gazoty ◽

G. Fiandaca ◽

J. Pedersen ◽

E. Auken ◽

A.V. Christiansen

Keyword(s):

Time Domain ◽

Induced Polarization ◽

Polarization Data ◽

Spectral Induced Polarization

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Application of concentration-volume fractal method in induced polarization and resistivity data interpretation for Cu-Mo porphyry deposits exploration, case study: Nowchun Cu-Mo deposit, SE Iran

Nonlinear Processes in Geophysics ◽

10.5194/npg-19-431-2012 ◽

2012 ◽

Vol 19 (4) ◽

pp. 431-438 ◽

Cited By ~ 11

Author(s):

L. Daneshvar Saein ◽

I. Rasa ◽

N. Rashidnejad Omran ◽

P. Moarefvand ◽

P. Afzal

Keyword(s):

Mineral Exploration ◽

Data Interpretation ◽

Fractal Model ◽

Induced Polarization ◽

Geophysical Data ◽

Fractal Method ◽

Porphyry Deposit ◽

Porphyry Deposits ◽

Resistivity Data

Abstract. The aim of this study is the utilization of the concentration-volume (C-V) fractal method based on geoelectrical data including induced polarization (IP) and resistivity (RS) in targeting areas hosting different sulfidic mineralization zones in Nowchun Cu-Mo porphyry deposit, SE Iran. The C-V fractal model employed in this research in order to separate high and moderate sulfidic zones from low sulfidic zone and barren wall rocks in the deposit is corresponding to chargeability and resistivity. Results obtained from the C-V method indicate that there is a positive correlation between subsurface mineralization and sulfide mineralized zones; additionally, use of the C-V method based on geophysical data is recognized as an accurate approach for delineation of various mineralization zones in the depth for optimization of mineral exploration operation, particularly in porphyry deposits.

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Spectral Induced Polarization Survey with Distributed Array System for Mineral Exploration: Case Study in Saudi Arabia

Minerals ◽

10.3390/min10090769 ◽

2020 ◽

Vol 10 (9) ◽

pp. 769 ◽

Cited By ~ 1

Author(s):

Fouzan A. Alfouzan ◽

Abdulrahman M. Alotaibi ◽

Leif H. Cox ◽

Michael S. Zhdanov

Keyword(s):

Effective Medium Theory ◽

Coupling Effect ◽

Pilot Project ◽

Drill Hole ◽

Induced Polarization ◽

Effective Medium ◽

Inductive Coupling ◽

Geothermal Resources ◽

Spectral Induced Polarization ◽

Distributed Array

The Saudi Arabian Glass Earth Pilot Project is a geophysical exploration program to explore the upper crust of the Kingdom for minerals, groundwater, and geothermal resources as well as strictly academic investigations. The project began with over 8000 km2 of green-field area. Airborne geophysics including electromagnetic (EM), magnetics, and gravity were used to develop several high priority targets for ground follow-up. Based on the results of airborne survey, a spectral induced polarization (SIP) survey was completed over one of the prospective targets. The field data were collected with a distributed array system, which has the potential for strong inductive coupling. This was examined in a synthetic study, and it was determined that with the geometries and conductivities in the field survey, the inductive coupling effect may be visible in the data. In this study, we also confirmed that time domain is vastly superior to frequency domain for avoiding inductive coupling, that measuring decays from 50 ms to 2 s allow discrimination of time constants from 1 ms to 5 s, and the relaxation parameter C is strongly coupled to intrinsic chargeability. We developed a method to fully include all 3D EM effects in the inversion of induced polarization (IP) data. The field SIP data were inverted using the generalized effective-medium theory of induced polarization (GEMTIP) in conjunction with an integral equation-based modeling and inversion methods. These methods can replicate all inductive coupling and EM effects, which removes one significant barrier to inversion of large bandwidth spectral IP data. The results of this inversion were interpreted and compared with results of drill hole set up in the survey area. The drill hole intersected significant mineralization which is currently being further investigated. The project can be considered a technical success, validating the methods and effective-medium inversion technique used for the project.

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