Advances in Computational Modeling and Isotope Analyses in Volcanogenic Massive Sulfide (VMS) Deposits

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

Deadline for manuscript submissions: closed (28 April 2023) | Viewed by 4021

Special Issue Editors


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Guest Editor
School of Mining and Metallurgical Engineering, National Technical University of Athens, Iroon Polytechneiou 9, Zografou, 15780 Athens, Greece
Interests: ore deposit geology; sulfide-sulfosalt mineralogy and geochemistry; applied geochemistry; stable and radiogenic isotopic geochemistry
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Guest Editor
Department of Materials Science, School of Natural Sciences, University of Patras, 26504 Rio Patras, Greece
Interests: VMS deposits; hydrothermal mineralization; geochemistry
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Special Issue Information

Dear Colleagues,

Volcanic-hosted or volcanogenic-massive sulfides (VMS) form in submarine volcanic and volcano-sedimentary successions located at or close to divergent margins, convergent arc and back-arc spreading settings. In general, they can be traced in nearly all possible geotectonic environments related to volcanic activity in deep sea basins, regardless of the type of volcanism.

VMS bear certain characteristics beneficial to mankind from the earliest stages of human history, including ease of identification, mining and ore processing. Their significance lies in their potential primarily for base metals, but also for precious and strategic metals and metalloids (such as Ga, Ge, As, Mo, Cd, In, Sn, Sb and Bi), the latter characterized by continuous and exponential demand. Therefore, the VMS is considered to this day essential for humankind’s evolution and development.

Recent advances in Information Technology (IT) are employed in the development of computational models regarding the physicochemical, geochemical and geological conditions prevailing during VMS formation (e.g., estimation of hydraulic conditions, heat flow, mass transfer, solubility/precipitation of metals). Additionally, modern analytical techniques may be used in exotic stable and radiogenic isotopes analyses, thus providing information on the source fluids and geotectonic setting of VMS. The objective of this Special Issue is to address the aforementioned advances and provide valuable information in future VMS exploration and prospecting.

Dr. Stavros Triantafyllidis
Dr. Stylianos Tombros
Guest Editors

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Keywords

  • sulfides-sulfosalts
  • strategic and critical metals
  • massive ore
  • polymetallic mineralization
  • computational modeling
  • stable and radiogenic isotopes
  • geotectonic setting

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Published Papers (2 papers)

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Research

17 pages, 2465 KiB  
Article
Deciphering the Evolution of Adjacent Volcanogenic Massive Sulfide (VMS) Systems Based on Radiogenic and Stable Isotopes, the Case of Ermioni, Argolis Peninsula, Ne Peloponnese, Greece
by Stavros Savvas Triantafyllidis and Stylianos Fotios Tombros
Minerals 2023, 13(4), 474; https://doi.org/10.3390/min13040474 - 27 Mar 2023
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Abstract
The study follows previous work on Ermioni VMS and addresses in detail the formation and evolution of two adjacent VMS systems, Karakasi and Roro. It is based on a stable and radiogenic isotopic composition of sulfides and ganguefrom stringer (Karakasi) and massive (Roro) [...] Read more.
The study follows previous work on Ermioni VMS and addresses in detail the formation and evolution of two adjacent VMS systems, Karakasi and Roro. It is based on a stable and radiogenic isotopic composition of sulfides and ganguefrom stringer (Karakasi) and massive (Roro) VMS ore. The isotopic geochemistry of Pb and noble gases (Ar-He) of pyrite from both sites indicates the development of a deep and evolved heat and possibly metal source attributed to subduction of radiogenic material (Pindos oceanic crust). The differences in the stable (Fe, S) and radiogenic (Sr, Ar) isotopic compositions between the two sites depict variation in the geologic environment of VMS formation, and in particular the effect of seawater. The higher δ57Fe and δ34S values of Roro massive pyrite are attributed to direct interaction of hot, ascending metal-bearing hydrothermal fluids with cold seawater. Karakasi stringer oreis characterized by higher 87Sr/86Sr ratios and radiogenic Ar values (as 40Ar/36Ar), indicating interaction of ore-bearing, hydrothermal fluids with crustal material (hanging-wall turbidites). During the approximate 0.5 Ma period separating the two systems, the hydrothermal system migrated from east to west, and at the same time evolved from free discharge on the seafloor (Roro—easterly), resembling contemporary seafloor style and mound-shaped massive sulfides, to a sediment-confined, subseafloor system (Karakasi—westerly). Full article
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18 pages, 3445 KiB  
Article
Tracing the Source of Hydrothermal Fluid in Ophiolite-Related Volcanogenic Massive Sulfide Deposits: A Case Study from the Italian Northern Apennines
by Gabriella B. Kiss, Kata Molnár, Zsolt Benkó, Péter Skoda, Zsuzsanna Kapui, Giorgio Garuti, Federica Zaccarini, László Palcsu and György Czuppon
Minerals 2023, 13(1), 8; https://doi.org/10.3390/min13010008 - 21 Dec 2022
Cited by 2 | Viewed by 1752
Abstract
The Italian Northern Apennines contain several Fe-Cu-Zn-bearing, Cyprus-type volcanogenic massive sulfide (VMS) deposits, which significantly contribute to the Cu resources of Italy. The massive sulfide lenses and related stockwork mineralizations are hosted by several levels (from basalt to serpentinite) of the unmetamorphosed ophiolitic [...] Read more.
The Italian Northern Apennines contain several Fe-Cu-Zn-bearing, Cyprus-type volcanogenic massive sulfide (VMS) deposits, which significantly contribute to the Cu resources of Italy. The massive sulfide lenses and related stockwork mineralizations are hosted by several levels (from basalt to serpentinite) of the unmetamorphosed ophiolitic series; therefore, this region offers perfect locations to study the ore-forming hydrothermal system in detail. A combination of fluid inclusion microthermometry, Raman spectroscopy, electron probe analyses (chlorite thermometry) and stable and noble gas isotope geochemistry was used to determine the fluid source of the VMS system at Bargone, Boccassuolo, Campegli, Casali–Monte Loreto, Corchia, Reppia and Vigonzano. This question of the fluid source is the focus of modern VMS research worldwide, as it has a direct influence on the metal content of the deposit. The obtained temperature and compositional data are both in the typical range of VMS systems and basically suggest evolved seawater origin for the mineralizing fluid. Modification of seawater was most commonly due to fluid–rock interaction processes, which happened during long-lasting circulation in the crust. The role of a small amount of magmatic fluid input was traced only at the lower block of Boccassuolo, which may be responsible for its higher ore grade. This fluid origin model is evidenced by O, H and C stable isotopic as well as He, Ne and Ar noble gas isotopic values. Full article
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