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Minerals
Special Issues
Applications of Gravity and Magnetics to Mineral Exploration
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Applications of Gravity and Magnetics to Mineral Exploration

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

Deadline for manuscript submissions: closed (10 March 2023) | Viewed by 4189

Special Issue Editor

Prof. Gordon Cooper

E-Mail Website
Guest Editor
School of Geosciences, University of the Witwatersrand, Private Bag X3, Johannesburg P.O. Box Wits 2050, South Africa
Interests: gravity; magnetics; image processing; signal processing

Special Issue Information

Dear Colleagues,

Potential field data are widely used in the search for new mineral deposits. A large number of semiautomatic interpretation techniques are used to provide initial estimates of source parameters, such as the location, depth, dip, susceptibility, etc. These initial estimates are then refined by forward and inverse modeling. As well as including case histories, this Special Issue will look at new developments of techniques in all of these areas of research.

Prof. Gordon Cooper
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • magnetics
  • gravity
  • semiautomatic interpretation methods

Published Papers (3 papers)

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Research

10 pages, 5554 KiB  
Article
Novel Second-Order Derivative-Based Filters for Edge and Ridge/Valley Detection in Geophysical Data
by Gordon Robert John Cooper
Minerals 2023, 13(9), 1229; https://doi.org/10.3390/min13091229 - 19 Sep 2023
Cited by 1 | Viewed by 639
Abstract
Derivative-based high-pass filters of various types are commonly applied to potential field data to reveal subtle or hard-to-see structures in the quest for mineral exploration. One approach is to exploit the fact that data have an amplitude and phase component in the space [...] Read more.
Derivative-based high-pass filters of various types are commonly applied to potential field data to reveal subtle or hard-to-see structures in the quest for mineral exploration. One approach is to exploit the fact that data have an amplitude and phase component in the space domain. In the past, this has been used to produce first-order derivative-based enhanced datasets with minimal noise issues. The work is extended here to second-order derivative-based filters, which are useful in enhancing not just edges but also ridges and valleys in data. The filters compare favourably with existing second-order derivative-based filters that were applied to gravity and magnetic datasets from South Africa. Full article
(This article belongs to the Special Issue Applications of Gravity and Magnetics to Mineral Exploration)
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16 pages, 12862 KiB  
Article
Gravity Data Reveal New Evidence of an Axial Magma Chamber Beneath Segment 27 in the Southwest Indian Ridge
by Chenming Tu, Qing Liang, Chunhui Tao, Zhikui Guo, Zhengwang Hu and Chao Chen
Minerals 2022, 12(10), 1221; https://doi.org/10.3390/min12101221 - 27 Sep 2022
Cited by 2 | Viewed by 1323
Abstract
Hydrothermal systems are integral to mid-ocean ridge activity; they form massive seafloor sulfide (SMS) deposits rich in various metallic elements, which are potential mineral resources. Since 2007, many hydrothermal fields have been discovered along the ultraslow-spreading Southwest Indian Ridge (SWIR). The Duanqiao hydrothermal [...] Read more.
Hydrothermal systems are integral to mid-ocean ridge activity; they form massive seafloor sulfide (SMS) deposits rich in various metallic elements, which are potential mineral resources. Since 2007, many hydrothermal fields have been discovered along the ultraslow-spreading Southwest Indian Ridge (SWIR). The Duanqiao hydrothermal field is located at segment 27’s axis between the Indomed and Gallieni transform faults; tomography models reveal an obvious low-velocity anomaly beneath it, indicating a possible axial magma chamber (AMC). However, confirmation of an AMC’s existence requires further study and evidence. In this study, we first calculated the gravity effect to identify the heterogeneous distribution of crustal density beneath segment 27 and the surrounding area. Next, we used the gravity-inversion method to obtain the crustal density structure beneath the study area. The results indicate that a thickened crust and low-density crustal materials exist beneath segment 27. The low-density anomaly in the lower crust beneath the Duanqiao hydrothermal field suggests the existence of an AMC covered with a cold and dense upper crust. The density results identify several faults, which provide potential channels for magma migration. In addition, the melt migrates westward and redistributes laterally toward the segment’s western end. However, when migrating toward the segment’s eastern end, the melt is affected by a rapid cooling mechanism. Therefore, the segment’s ends present different density features and morphologies of nontransform discontinuities (NTDs). Full article
(This article belongs to the Special Issue Applications of Gravity and Magnetics to Mineral Exploration)
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26 pages, 8709 KiB  
Article
Occurrence Characteristics of Magnetite and Aeromagnetic Prospecting Northeast of Hebei Province
by Yan-Xu Liu, Wen-Yong Li, Zhi-Yuan Liu, Jia-Wei Zhao, An-Qi Cao, Shan Gao, Li-Jie Wang and Cheng Yang
Minerals 2022, 12(9), 1158; https://doi.org/10.3390/min12091158 - 14 Sep 2022
Cited by 2 | Viewed by 1683
Abstract
The occurrence characteristics of magnetite and the methods to quickly and effectively explore are important topics for ore prospecting in the new era. Taking northeast of Hebei Province of China as an example, this article aimed at an important strategic mineral of magnetite, [...] Read more.
The occurrence characteristics of magnetite and the methods to quickly and effectively explore are important topics for ore prospecting in the new era. Taking northeast of Hebei Province of China as an example, this article aimed at an important strategic mineral of magnetite, then discussed its distribution characteristics and aeromagnetic exploration methods of it. First of all, we discuss the occurrence characteristics of sedimentary metamorphic and magmatic magnetite. Then, using the latest high-precision aeromagnetic data, combined with the geological outcrops, known iron deposits, ground magnetic surveys, and verification, we studied the relationship between the aeromagnetic anomalies and iron deposits through potential field conversion processing of the reduction to the pole, vertical derivative, upward continuation and residual anomaly, and the forward modeling and inversion methods of 2.5 D optimization fitting. Next, we summarize the metallogenic conditions and attributes of aeromagnetic prospecting and make magnetite predictions. In addition, it has suitable magnetite prospecting potential in the Laochenjia, Dabai, Jiuwuying, Beierying, Sidaogoumen, and Wuyingzi aeromagnetic anomaly regions. In conclusion, these regions have aeromagnetic anomalies with high amplitudes, large scales, and favorable metallogenic backgrounds for magmatic rocks, strata, and structures caused by concealed magnetite. In addition, they have great prospecting potential. Eventually, we hope this research method in this article can provide a reference for magnetite exploration in other areas with similar geological conditions. Full article
(This article belongs to the Special Issue Applications of Gravity and Magnetics to Mineral Exploration)
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