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
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 geoch...
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MDPI AG
2023-03-01
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| Online Access: | https://www.mdpi.com/2075-163X/13/4/474 |
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| author | Stavros Savvas Triantafyllidis Stylianos Fotios Tombros |
| author_facet | Stavros Savvas Triantafyllidis Stylianos Fotios Tombros |
| author_sort | Stavros Savvas Triantafyllidis |
| collection | DOAJ |
| description | 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 δ<sup>57</sup>Fe and δ<sup>34</sup>S 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 <sup>87</sup>Sr/<sup>86</sup>Sr ratios and radiogenic Ar values (as <sup>40</sup>Ar/<sup>36</sup>Ar), 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). |
| first_indexed | 2024-03-11T04:42:13Z |
| format | Article |
| id | doaj.art-16f229aa663c42d7975d7db287c31d6a |
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| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-11T04:42:13Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-16f229aa663c42d7975d7db287c31d6a2023-11-17T20:35:11ZengMDPI AGMinerals2075-163X2023-03-0113447410.3390/min13040474Deciphering the Evolution of Adjacent Volcanogenic Massive Sulfide (VMS) Systems Based on Radiogenic and Stable Isotopes, the Case of Ermioni, Argolis Peninsula, Ne Peloponnese, GreeceStavros Savvas Triantafyllidis0Stylianos Fotios Tombros1School of Mining and Metallurgical Engineering, National Technical University of Athens, Iroon Polytechneiou 9, 157 80 Athens, GreeceDepartment of Materials Science, University of Patras, 26504 Rio Patras, GreeceThe 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 δ<sup>57</sup>Fe and δ<sup>34</sup>S 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 <sup>87</sup>Sr/<sup>86</sup>Sr ratios and radiogenic Ar values (as <sup>40</sup>Ar/<sup>36</sup>Ar), 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).https://www.mdpi.com/2075-163X/13/4/474radiogenic PbR/R<sub>A</sub> values<sup>57</sup>Fe and <sup>34</sup>S isotopesstringer and massive pyritehydrothermal system migrationseafloor and subseafloor VMS formation |
| spellingShingle | Stavros Savvas Triantafyllidis Stylianos Fotios Tombros 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 Minerals radiogenic Pb R/R<sub>A</sub> values <sup>57</sup>Fe and <sup>34</sup>S isotopes stringer and massive pyrite hydrothermal system migration seafloor and subseafloor VMS formation |
| title | 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 |
| title_full | 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 |
| title_fullStr | 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 |
| title_full_unstemmed | 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 |
| title_short | 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 |
| title_sort | 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 |
| topic | radiogenic Pb R/R<sub>A</sub> values <sup>57</sup>Fe and <sup>34</sup>S isotopes stringer and massive pyrite hydrothermal system migration seafloor and subseafloor VMS formation |
| url | https://www.mdpi.com/2075-163X/13/4/474 |
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