Modeling and Inversion of Gravity, Magnetic and Electromagnetic Related to Mineral Deposits

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Exploration Methods and Applications".

Deadline for manuscript submissions: 23 August 2024 | Viewed by 4386

Special Issue Editors

Department of Geology and Geophysics, University of Utah, Salt Lake City, UT 84112, USA
Interests: modeling and inversion of gravity; magnetic; electromagnetic

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Guest Editor
Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Wuhan 430100, China
Interests: electromagnetic prospecting theory; geophysical data inversion and interpretation; the application for hydrocarbon and mineral resources exploration

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Guest Editor
Distinguished Professor of Geophysics, Department of Geology and Geophysics, University of Utah, Salt Lake City, UT 84112, USA
Interests: theoretical and applied geophysics; inverse theory; joint inversion; mineral exploration; electromagnetic, gravity, magnetic, and seismic methods
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Special Issue Information

Dear Colleagues,

Minerals are very important materials in human life, and their deposits are essential resources in the modern industry. The increase in demand for minerals necessary for the development of clean energy is promoting the advancement of technology of mineral exploration.

The Mineral Exploration Methods and Applications Section welcomes papers related to all aspects of mineral resources, including geological, geophysical, geochemical, borehole, ground, and airborne methods and satellite imagery. Contributions regarding historical, technical, and practical aspects of exploration for mineral deposits are invited. Papers should either focus on a novel methodology of mineral exploration or present case studies where established or innovative techniques were successfully used. In addition, contributions are welcome providing novel insight into the foundations of geological, geophysical, and geochemical methods. The publications can be dedicated to field procedures and analytical techniques of geochemical exploration methods. Novel methods of gravity, magnetic, electromagnetic, radiometric, and seismic prospecting and their integration, including mathematical aspects of data processing and interpretation, as well as studies concerning remote sensing, production, and geographic information systems in mineral exploration, are welcome. The submission of papers on rock sample studies, survey design, data processing, and applications for mineral exploration are also encouraged.

Dr. Le Wan
Prof. Dr. Liangjun Yan
Prof. Dr. Michael S. Zhdanov
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Minerals is an international peer-reviewed open access monthly journal published by MDPI.

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Keywords

  • mineral exploration
  • mineral resources
  • rock physics
  • geological surveys
  • geophysical surveys
  • geochemical surveys
  • gravity methods
  • magnetic methods
  • electromagnetic methods
  • borehole methods
  • airborne surveys
  • radiometry
  • satellite imagery
  • remote sensing
  • modeling
  • inversion
  • big data
  • parallel computing
  • AI applications

Published Papers (3 papers)

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Research

18 pages, 7555 KiB  
Article
The Potential of the Horizontal Component TEM Data in the Detection of Polarizable Mineral: Synthetic Cases
by Yanqi Wu, Huilin Xie, Yanju Ji, Peng Zhao and Yuebing Wang
Minerals 2023, 13(4), 523; https://doi.org/10.3390/min13040523 - 7 Apr 2023
Viewed by 971
Abstract
Induced polarization (IP) effects in transient electromagnetic (TEM) measurement play a significant role in the detection of minerals, such as sulfide ore, clay ore, etc. However, due to the complex impacts caused by the polarization parameters, the structure of the earth, and the [...] Read more.
Induced polarization (IP) effects in transient electromagnetic (TEM) measurement play a significant role in the detection of minerals, such as sulfide ore, clay ore, etc. However, due to the complex impacts caused by the polarization parameters, the structure of the earth, and the measurement system configuration, the IP effects cannot be easily measured and interpreted. We paid more attention to the vertical component of the ungrounded-TEM system in previous work; however, we will now attempt to utilize the horizontal component to enhance the precision of the measurement and interpretation. We quantitatively discussed the behavior of the horizontal and vertical magnetic fields of the towed-TEM (tTEM) system. We simultaneously introduced the vertical and horizontal components into the Jacobian matrix of the 1D laterally constrained inversion to build the joint inversion. Compared to the vertical component, the horizontal component always shows earlier and bigger sign reversals and contains more IP information. Inversion with the single horizontal or single vertical component showed poor accuracy in the deep and shallow layers, respectively. The joint inversion with both components could correct the errors. Including the horizontal component in the detection and interpretation facilitates an improved resolution for polarizable minerals. Full article
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19 pages, 3121 KiB  
Article
A Prediction Method of Compacted Rock Hydraulic Permeability Based on the MGEMTIP Model
by Xiaolong Tong, Liangjun Yan and Kui Xiang
Minerals 2023, 13(2), 281; https://doi.org/10.3390/min13020281 - 17 Feb 2023
Viewed by 1117
Abstract
The permeability of the fluid-bearing rock is an important parameter for reservoir prediction. The Kozeny-Carman (K-C) formulation based on electrical measurements effectively characterizes the permeability-resistivity relationship of rocks with a single mineral composition or high porosity. The complex pore structure and mineral composition [...] Read more.
The permeability of the fluid-bearing rock is an important parameter for reservoir prediction. The Kozeny-Carman (K-C) formulation based on electrical measurements effectively characterizes the permeability-resistivity relationship of rocks with a single mineral composition or high porosity. The complex pore structure and mineral composition of compacted reservoirs affect induced polarization (IP) characteristics, indirectly limiting the applicability of conventional electrical K-C models. The permeability of fluid-bearing rocks is an important parameter for reservoir prediction. The theoretical chargeability of the modified generalized effective medium theory of induced polarization (MGEMTIP) model includes the effects of various conductive minerals. Due to the disconnection assumption of the disturbed medium in the MGEMTIP, there is a significant difference between the theoretical chargeability and the measured chargeability, and the difference is a sensitive parameter of rock permeability. A semi-empirical reservoir permeability prediction model is proposed based on the MGEMTIP. Theoretically and experimentally, the prediction model based on MGEMTIP is compared with the two electrical K-C models. Under the condition that the rock does not contain low-resistivity minerals, the prediction model based on MGEMTIP is theoretically equivalent to the K-C model. The experimental results show that this prediction model is more suitable for low-porosity and low-permeability rocks containing low-resistivity minerals, and the prediction results can be effectively restricted to the same order of magnitude. From the perspective of differences between model assumptions and natural rocks, the prediction model provides a semi-empirical relationship between complex mineral IP characteristics and permeability. Combined with the geological information of the survey area, the permeability prediction model can provide a theoretical basis for reservoir permeability prediction based on electromagnetic exploration. Full article
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21 pages, 9785 KiB  
Article
A Set of In-Well Receiver Array for Borehole Induced Polarization Detecting Technology in Deep Mine Exploration
by Yurong Mao, Liangjun Yan, Lei Zhou, Jianmei Xu and Huaizhi Chen
Minerals 2022, 12(10), 1247; https://doi.org/10.3390/min12101247 - 29 Sep 2022
Viewed by 1411
Abstract
With the rapid development of the economy, the demand for mineral resources has increased dramatically. Because it is difficult to explore new mines in deep and peripheral areas, new theories, technologies, methods, and equipment are needed. How to accurately and effectively carry out [...] Read more.
With the rapid development of the economy, the demand for mineral resources has increased dramatically. Because it is difficult to explore new mines in deep and peripheral areas, new theories, technologies, methods, and equipment are needed. How to accurately and effectively carry out new mine exploration has become an urgent research topic. In this study, based on the requirements of mine exploration within a depth of 3000 m, an array receiver for borehole-induced polarization was developed. Each channel of the receiver array independently acquires data, and it is able to carry out full waveform acquisition in the dual voltage and voltage difference mode. The structure of the receiver array can be flexibly adjusted to obtain array observations of induced polarization in different ways. Experiments demonstrated that the device works well at a high temperature of 155 °C, its resolution reached 0.1 μV, and the error between the different channels was less than 3%. Its dynamic range is 180 db. Through experiments on induced polarization in a demonstration mining area, the apparent resistivity curve and the apparent polarization curve were determined to be consistent with the known well-logging information, and the interpretation results were in agreement with the stratum information. Full article
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

1. Dr. Yanqi Wu and co-authors: The potential of the horizontal component TEM data in the detection of polarizable mineral: synthetic cases
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