The origin of amphibolites from metamorphic soles beneath the ultramafic ophiolites in Evia and Lesvos (Greece) and their geotectonic implication

Gartzos, E.; Dietrich, Volker; Migiros, G.; Serelis, K.; Lymperopoulou, Th.

doi:10.1016/j.lithos.2008.09.013

Cited by 19 publications

(13 citation statements)

References 46 publications

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“…According to the extreme composition of this group of rocks and considering the microscopic observations of thin sections, NA-9 ampibolite is interpreted as a metamorphosed tholeiitic basalt, whereas NA-7 is probably a metasomatised cummulate rock, in particular a former pyroxenite (NA-7). The bulk-rock geochemical characteristics of these amphibolites are comparable to amphibolites from metamorphic soles beneath the ultramafic ophiolites in northern Evia [8]. A metagabbro (SA-11) from a metamorphosed ophiolitic mélange in central Samos-Myli, displays primitive basaltic composition with 9 wt % MgO at 50.3 wt % SiO 2 .…”

Section: Naxos Amphibolites and Central Samos Metagabbro (Cbu)mentioning

confidence: 78%

“…The aim was to evaluate the similarities/differences between samples from different structural units of the same islands. Detailed geological maps of the (a) Paros (after [14]); (b) Naxos by [8,25]; detailed geological maps of the (c) Samos (modified after [26,40]); (d) Skyros by [27]). Numbers indicate sample locations.…”

Section: Local Geologymentioning

confidence: 99%

“…Ophiolitic remnants are widespread in the Cyclades, southern Aegean, occurring in the upper portion of the tectono-stratigraphic stack ( Figure 1) [1][2][3][4][5][6]. The mode of occurrence of ophiolitic associations varies in different parts of the Cyclades (Figure 1b,c) [7][8][9]. The typical mode of occurrence is within low-pressure metamorphosed mélanges in the Upper Cycladic Unit, as on the islands of Anafi [5], Ikaria [10], and Samos (Kallithea nappe) [11], interpreted as subduction-accretion units of Cretaceous age [12] (Figure 1c).…”

Section: Introductionmentioning

confidence: 99%

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Ophiolitic Remnants from the Upper and Intermediate Structural Unit of the Attic-Cycladic Crystalline Belt (Aegean, Greece): Fingerprinting Geochemical Affinities of Magmatic Precursors

et al. 2017

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The ophiolitic rocks of the Attic-Cycladic crystalline belt are considered of key importance for understanding the Mesozoic tectonic evolution of the Aegean region. Unresolved questions concern their tectono-stratigraphic relationships across the region. The mode of occurrence of the Cycladic ophiolites varies, as they appear as: (a) dismembered blocks (olistoliths) within the supra-detachment units of Paros and Naxos; (b) mélange formations in the upper structural unit of western Samos and Skyros; and (c) meta-ophiolitic mélange in the Cycladic Blueschist Unit (CBU) from central Samos. The trace element geochemistry and Pb-Sr-Nd isotopes of the mafic ophiolitic rocks indicate four geochemical groups: (a) the upper unit metabasites from Paros and western Samos (Kallithea) display an evolved basaltic composition (Mg# 40.2-59.6), with low Zr/Nb values (5-16) and high Ce/Y values (1.3 to 2.6) compared to MORB, indicating island-arc tholeiite affinities; (b) Naxos upper unit metabasalts show spider diagrams patterns indicating ocean island basalt (OIB-type) affinities; (c) Central Samos metagabbros (CBU) are primitive rocks with Back-Arc Basin basalt affinities; (d) the Skyros metadolerites and Tinos (Mt Tsiknias) and S. Evia (CBU) metagabbros, cluster as a separate geochemical group; they exhibit high MgO values (>10 wt %), very low TiO 2 values (0.1-0.2 wt %), Y and Yb, and depleted trace element N-MORB normalized patterns, similar to volcanic rocks formed in modern oceanic fore-arc settings, such as boninites. A combination of the Pb-and Sr-isotopic compositions of Cycladic metabasites indicate that the Pb and Sr incorporated in the Cycladic ophiolites correspond to mixtures of magmatic fluids with seawater (206 Pb/ 204

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Section: Naxos Amphibolites and Central Samos Metagabbro (Cbu)mentioning

confidence: 78%

Section: Local Geologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ophiolitic Remnants from the Upper and Intermediate Structural Unit of the Attic-Cycladic Crystalline Belt (Aegean, Greece): Fingerprinting Geochemical Affinities of Magmatic Precursors

et al. 2017

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“…), Oraiokastro, and Gevgelis. Additionally, ophiolites are also present in Evros (Soufli and Dadia), Rodopi (Organi and Murtiskos), Samothrace, Lesvos [32], Rhodes, and Crete. Ophiolite complexes comprise ultramafic rocks, such as dunites, peridotites, pyroxenites and diabases, in the basal layers, whereas the upper layers of the complex consist of gabbros and pillow lavas.…”

Section: Geological Backgroundmentioning

confidence: 99%

Occurrence of Cr(VI) in drinking water of Greece and relation to the geological background

Kaprara

Kazakis

Simeonidis

et al. 2015

Journal of Hazardous Materials

118

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“…Giorgios, but it is rather small (2 km 2 ). The ophiolite units of two Greek islands, Evia and Lesvos, comprise of amphibolitesm, and below them lie ultramafic masses that consist of serpentinized harzburgites, patches of dunites and serpentinized depleted iherzolites and harzburgites, respectively [93]. A study that was conducted in the east part of Thessaly, Central Greece showed that the metaophiolites of this region consisted mainly of serpentinites and metabasites [94] The Pindos ophiolite complex in NW Greece is mainly comprised of large harzburgite-dunite masses > 1000 km 2 in the mantle peridotites [95][96][97].…”

Section: Co 2 Storage In Greecementioning

confidence: 99%

Carbon Capture and Storage: A Review of Mineral Storage of CO2 in Greece

Kelektsoglou

2018

Sustainability

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As the demand for the reduction of global emissions of carbon dioxide (CO2) increases, the need for anthropogenic CO2 emission reductions becomes urgent. One promising technology to this end, is carbon capture and storage (CCS). This paper aims to provide the current state-of-the-art of CO2 capure, transport, and storage and focuses on mineral carbonation, a novel method for safe and permanent CO2 sequestration which is based on the reaction of CO2 with calcium or magnesium oxides or hydroxides to form stable carbonate materials. Current commercial scale projects of CCS around Europe are outlined, demonstrating that only three of them are in operation, and twenty-one of them are in pilot phase, including the only one case of mineral carbonation in Europe the case of CarbFix in Iceland. This paper considers the necessity of CO2 sequestration in Greece as emissions of about 64.6 million tons of CO2 annually, originate from the lignite fired power plants. A real case study concerning the mineral storage of CO2 in Greece has been conducted, demonstrating the applicability of several geological forms around Greece for mineral carbonation. The study indicates that Mount Pindos ophiolite and Vourinos ophiolite complex could be a promising means of CO2 sequestration with mineral carbonation. Further studies are needed in order to confirm this aspect.

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The origin of amphibolites from metamorphic soles beneath the ultramafic ophiolites in Evia and Lesvos (Greece) and their geotectonic implication

Cited by 19 publications

References 46 publications

Ophiolitic Remnants from the Upper and Intermediate Structural Unit of the Attic-Cycladic Crystalline Belt (Aegean, Greece): Fingerprinting Geochemical Affinities of Magmatic Precursors

Ophiolitic Remnants from the Upper and Intermediate Structural Unit of the Attic-Cycladic Crystalline Belt (Aegean, Greece): Fingerprinting Geochemical Affinities of Magmatic Precursors

Occurrence of Cr(VI) in drinking water of Greece and relation to the geological background

Carbon Capture and Storage: A Review of Mineral Storage of CO2 in Greece

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