Volcanism of the South Aegean Volcanic Arc

Vougioukalakis, Georges; Satow, Christopher; Druitt, Timothy H.

doi:10.2138/gselements.15.3.159

Cited by 18 publications

(10 citation statements)

References 27 publications

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“…(2022), volcanic ages of the Kos‐Nisyros‐Yali Complex from Vougioukalakis et al. (2019) as well as Kutterolf et al. (2021), and tectonic phases of Rhodos from Van Hinsbergen et al.…”

Section: Discussionmentioning

confidence: 99%

“…This hypothesis is further supported by comparing the evolution of the CSK volcanic field with that of the Kos‐Nisyros‐Yali complex on the eastern Hellenic Volcanic Arc (Figure 6). The earliest volcanic activity of the Kos‐Nisyros‐Yali volcanic complex built dome complexes on southern Kos between 3.4 and 1.6 Ma (e.g., Vougioukalakis et al., 2019) approx. during the same time as Christiana was active and Rhodos tilted first (Figure 6a).…”

Section: Discussionmentioning

confidence: 99%

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Volcano‐Tectonic Evolution of the Christiana‐Santorini‐Kolumbo Rift Zone

et al. 2022

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The interplay of volcanism and tectonism has shaped many volcanic systems across the world (Acocella, 2021). Regional tectonics weakens the crust through increased faulting and fracturing creating pathways for magmatic fluids to ascend to the surface, although the controlling mechanisms remain elusive (e.g., Hill et al., 2002;Manga & Brodsky, 2006). Our current knowledge of volcano-tectonic feedback mechanisms is based mostly on the interplay of earthquakes and volcanic eruptions on time scales ranging from minutes to decades by direct observations or historic records (e.g., Manga & Brodsky, 2006;Watt et al., 2009). These studies revealed that tectonic movements can change stress levels in the crust and the underlying mantle, influencing production and ascent rates, as well as sizes and explosivities of eruptions. In turn, volcanism can alter the stress of the crust by accommodating extensional strain and inhibiting the formation of faults (Faulds & Varga, 1998) highlighting complex feedback

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“…(2022), volcanic ages of the Kos‐Nisyros‐Yali Complex from Vougioukalakis et al. (2019) as well as Kutterolf et al. (2021), and tectonic phases of Rhodos from Van Hinsbergen et al.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Volcano‐Tectonic Evolution of the Christiana‐Santorini‐Kolumbo Rift Zone

et al. 2022

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“…In a slightly wider circle around Milos island, the 6.943 ± 0.005 Ma a1-tephra event recorded in several locations on nearby Crete (Rivera et al, 2011), shows that explosive volcanism along the Aegean arc, possibly on Milos, already occurred during the Messinian. These ash beds cannot be traced to currently exposed centres in the Milos VF and could conceivably be related to volcanic centres further north (Antiparos and Patmos), which were active during this time interval (Vougioukalakis et al, 2019). Biostratigraphy shows that the youngest layer with dateable fossils (bio-event, the last common occurrence of Sphenolithus spp., Van Hinsbergen et al, 2004) in the Neogene sedimentary rocks is 3.54 Ma old (GTS2012, Gradstein et al, 2012).…”

Section: The Published Ages Of the Other Volcanic Unitsmentioning

confidence: 96%

Eruptive history and 40Ar/39Ar geochronology of the Milos volcanic field, Greece

Zhou

Kuiper²,

Wijbrans³

et al. 2020

Preprint

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Abstract. High-resolution geochronology is essential to determine the growth-rate of volcanoes, which is one of the key factors to establish the periodicity of explosive volcanic eruptions. However, there are less high-resolution eruptive histories (> 106 years) determined for long-lived submarine arc volcanic complexes than for subaerial complexes, since the submarine volcanoes are far more difficult to observe than subaerial ones. In this study, high-resolution geochronology and major element data are presented for Milos Volcanic Field (VF) in the South Aegean Volcanic Arc, Greece. The Milos VF has been active for over 3 Myrs, and the first two million years of its eruptive history occurred in a submarine setting that has emerged above sea level nowadays. The long submarine volcanic history of the Milos VF makes it an excellent natural laboratory to study the growth-rate of a long-lived submarine arc volcanic complex. This study reports twenty-one new high-precision 40Ar/39Ar ages and major element compositions for eleven volcanic units of the Milos VF. This allows us to refine the volcanic evolution of Milos into nine phases and five volcanic quiescence periods of longer than 200 kyrs, on the basis of age, composition, volcano type and location. Phase 1–5 (~ 3.34–1.60 Ma) contributed ~ 85 % by volume to the Milos VF, whereas the volcanoes of Phase 6–9 only erupted small volumes (2–6 km3 in DRE) rhyolitic magmas. Although there are exceptions of the felsic cone volcanoes of Phase 1–2, in general the Milos VF becomes more rhyolitic in composition from Phase 1 to Phase 9. In particular, the last three phases (Phase 7–9) only contain rhyolites. Moreover, the high-resolution geochronology suggests that there are at least three periods of different long term volumetric volcanic output rate (Qe). In the Milos VF, the Qe varies between 0.2 and 6.6 × 10−5 km3 yr−1, 2–3 orders of magnitude lower than the average for rhyolitic systems and continental arcs.

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“…Additionally, Paleocene to Miocene magmatic activity and Tertiary migmatization have been mainly recognized in the Serbo-Macedonian/Rhodope and Cyclades metamorphic provinces, related to extensional regime and/or mantel delamination processes (Figures 3, 4, 16 and 19; e.g., [7,17,89,95,216,220,222,223,270]). Finally, Neogene to Quaternary volcanic products are recorded in the broader Internal Hellenides zones until the active Hellenic volcanic arc, showing, from the older to the younger products, S-SW-ward propagation (Figures 2 and 20; [271][272][273][274][275][276].…”

Section: Alpine Magmatic and Depositional Processesmentioning

confidence: 99%

The Alpine Geological History of the Hellenides from the Triassic to the Present—Compression vs. Extension, a Dynamic Pair for Orogen Structural Configuration: A Synthesis

Kilias

2023

Geosciences

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In this paper, the Hellenic orogenic belt’s main geological structure and architecture of deformation are presented in an attempt to achive a better interpretation of its geotectonic evolution during Alpine orogeny. This study was based not only on recent research that I and my collaborators conducted on the deformational history of the Hellenides but also on more modern views published by other colleagues concerning the Alpine geotectonic reconstruction of the Hellenides. The structural evolution started during the Permo–Triassic time with the continental breaking of the supercontinent Pangea and the birth of the Neotethyan ocean realm. Bimodal magmatism and A-type granitoid intrusions accompanied the initial stages of continental rifting, followed by Triassic–Jurassic multiphase shallow- and deep-water sediment deposition on both formed continental margins. These margins were the Apulian margin, containing Pelagonia in the western part of the Neotethyan Ocean, and the European margin, containing continental parts of the Serbo-Macedonian and Rhodope massifs in the eastern part of the Neotethyan ocean. Deformation and metamorphism are recorded in six main deformational stages from the Early–Middle Jurassic to the present day, beginning with Early–Middle Jurassic Neotethyan intra-oceanic subduction and ensimatic island arc magmatism, as well as the formation of a suprasubduction oceanic lithosphere. Compression, nappe stacking, calc-alkaline magmatism, and high-pressure metamorphic events related to subduction processes alternated successively over time with extension, orogenic collapse, medium- to high-temperature metamorphism, adakitic and calc-alkaline magmatism, and partial migmatization related to the uplift and exhumation of deep crustal levels as tectonic windows or metamorphic core complexes. A S- to SW-ward migration of dynamic peer compression vs. extension is recognized during the Tertiary Alpine orogenic stages in the Hellenides. It is suggested that all ophiolite belts in the Hellenides originated from a single source, and this was the Neotethyan Meliata/Maliac-Axios/Vardar ocean basin, parts of which obducted during the Mid–Late Jurassic on both continental margins, Apulian (containing Pelagonia) and European (containing units of the Serbo-Macedonian/Rhodope nappe stack), W-SW-ward and E-NE-ward, respectively. In this case, the ophiolite nappes should be considered far-traveled nappes on the continental parts of the Hellenides associated with the deposition of Middle–Late Jurassic ophiolitic mélanges in basins at the front of the adjacent ophiolite thrust sheets. The upper limit of the ophiolite emplacement are the Mid–Upper Jurassic time(Callovian–Oxfordian), as shown by the deposition of the Kimmeridgian–Tithonian Upper Jurassic sedimentary carbonate series on the top of the obducted ophiolite nappes. The lowermost Rhodope Pangaion unit is regarded as a continuation of the marginal part of the Apulian Plate (External Hellenides) which was underthrust during the Paleocene–Eocene time below the unified Sidironero–Kerdylia unit and the Pelagonian nappe, following the Paleocene–Eocene subduction and closure of a small ocean basin in the west of Pelagonia (the Pindos–Cyclades ocean basin). It preceded the Late Cretaceous subduction of the Axios/Vardar ocean remnants below the European continental margin and the final closure of the Axios/Vardar ocean during the Paleocene–Eocene time, which was associated with the overthrusting of the European origins Vertiskos–Kimi nappe on the Sidironero–Kerdylia nappe and, subsequently, the final collision of the European margin and the Pelagonian fragment. Subsequently, during a synorogenic Oligocene–Miocene extension associated with compression and new subduction processes at the more external orogenic parts, the Olympos–Ossa widow and the Cyclades, together with the lower-most Rhodope Pangaion unit, were exhumed as metamorphic core complexes.

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Volcanism of the South Aegean Volcanic Arc

Cited by 18 publications

References 27 publications

Volcano‐Tectonic Evolution of the Christiana‐Santorini‐Kolumbo Rift Zone

Volcano‐Tectonic Evolution of the Christiana‐Santorini‐Kolumbo Rift Zone

Eruptive history and 40Ar/39Ar geochronology of the Milos volcanic field, Greece

The Alpine Geological History of the Hellenides from the Triassic to the Present—Compression vs. Extension, a Dynamic Pair for Orogen Structural Configuration: A Synthesis

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