Special Issue "Advances in Cu-Ni-PGE Mineralization"

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

Deadline for manuscript submissions: 31 December 2022 | Viewed by 1402

Special Issue Editor

Prof. Dr. Aberra Mogessie
E-Mail Website
Guest Editor
Institute of Earth Sciences, University of Graz, Universtaetsplatz 2, A-8010 Graz, Austria
Interests: petrology; mineralogy; geochemistry; economic geology

Special Issue Information

Dear Colleagues,

We are planning to set up a new Special Issue focused on "Advances in Cu-Ni-PGE Mineralization" for the journal Minerals (https://www.mdpi.com/journal/minerals). We invite you to submit your research results dealing with Cu-Ni-PGE mineralization for publication in this Special Issue

Cu-Ni-PGE mineralization is associated with mafic/ultramafic rocks. However, all mafic/ultramafic rocks do not contain these deposits. Their occurrence depends on the type of  primary magma, degree of partial melting, tectonic setting, and the involvement of fluids, where the magma–country rock interaction can lead to sulfide saturation and to the formation of such deposits. Some of the detailed studied deposits include the Bushveld in South Africa, Sudbury in Canada, Stillwater in USA, and Norilsk in Russia. In contrast to most Cu-Ni-PGE deposits that are related to large Proterozoic-layered intrusions, the Norilsk deposits are unique because of their location inside the Phanerozoic Siberian Traps’ province of continental flood basalts. Shale-hosted Ni-Cu-PGE sulphide occurrences have also been documented in several localities. The suggested genetic models for this type of mineralization are syn-sedimentary mineralization, with metals being scavenged from the overlying water column, and exhalative hydrothermal mineralization, with metals being deposited into sedimentary basins from hydrothermal vents.

Models of exploration and modes of formation, which differ from locality to locality, have been developed in order to describe the Cu-Ni-PGE mineralization in such deposits. Because of the number of factors that affect mineralization in the different deposits, it is suggested that successful exploration requires the application of geological models, advanced geochemical and geophysical methods, and the study of the petrologic characteristics of the host rocks.

In addition to detailed petrologic and structural investigations, fluid inclusion and sulfur isotope studies, among others, are necessary in order to understand the primary magmatic origin or the involvement of contamination in the mineralization process of Cu-Ni-PGE deposits.

Most of the deposits outlined above, as well as those not included in this short summary, have been studied for a number of years by prominent scientists and are well documented. However, exploration methods, analytical techniques, and modelling are developing with time. In this special volume, we would like to publish research findings dealing with new data on “Advances in Cu-Ni-PGE Mineralization”, as related to exploration, models of mineralization, and analytical methods.

Accepted papers will be continuously published in the journal (as soon as accepted) and will be listed together on the Special Issue website.

Prof. Dr. Aberra Mogessie
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 2000 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

  • mafic-ultramafic rocks
  • Cu-Ni-PGE
  • shale-hosted
  • Siberian Traps

Published Papers (1 paper)

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Research

Article
Downdip Development of the Ni-Cu-PGE-Bearing Mafic to Ultramafic Uitkomst Complex, Mpumalanga Province, South Africa
Minerals 2022, 12(1), 22; https://doi.org/10.3390/min12010022 - 23 Dec 2021
Viewed by 910
Abstract
The about 2055-Ma-old mafic to ultramafic Uitkomst Complex in the Mpumalanga Province of South Africa hosts the low-grade-large-tonnage Ni-Cu-PGE deposit, Nkomati. The complex is regarded to represent a satellite to the Bushveld Complex and a feeder to an eroded magmatic reservoir in the [...] Read more.
The about 2055-Ma-old mafic to ultramafic Uitkomst Complex in the Mpumalanga Province of South Africa hosts the low-grade-large-tonnage Ni-Cu-PGE deposit, Nkomati. The complex is regarded to represent a satellite to the Bushveld Complex and a feeder to an eroded magmatic reservoir in the southeast. Aeromagnetic surveys and previous drilling indicated an overall northwestern-downdip extension of the complex, but the question is to what extent and in which expression can the complete intrusion be found under cover in the northwest? Answering this, a mineralogical, geochemical and geochronological investigation of a borehole intersection of the whole complex at Little Mamre was carried out, using petrography, XRF, EPMA and LA-ICP-MS U–Pb analyses of zircons for age determination. Although the total thickness of the rock units is larger than to the southeast, emplacement, litho- and mineral chemistry trends, expression of alteration mineralogy and style of sulphide mineralisation are similar. The amount of sulphide mineralisation is on average less than in the southeast. The upper ultramafic unit contains, more frequently, pegmatoidal sections, and the Chromitiferous Harzburgite unit has less massive chromitite layers than the southeastern parts of the complex, whereas the gabbro(-norite) units contain more interstitial liquid with late-stage minerals. The findings confirm that the anvil-shaped intrusion in cross section continues with increased thickness towards northwest at a shallow dip; although approaching the deeper part of the igneous reservoir, mineral compositions are partially more evolved. The overall mineralogical consistency downdip supports a situation of multiple magma replenishment along a flat-lying, northwest–southeast trending conduit, resulting in an evolved cumulus mineral assemblage in the upper part. Full article
(This article belongs to the Special Issue Advances in Cu-Ni-PGE Mineralization)
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