Major and minor element geochemistry of chromite from the Xerolivado–Skoumtsa mine, Southern Vourinos: Implications for chrome ore exploration

Tzamos, Evangelos; Filippidis, Anestis; Rassios, Anne Ewing; Grieco, G.; Michailidis, Kleopas; Koroneos, C.; Stamoulis, Kostas; Pedrotti, M.; Gamaletsos, P.

doi:10.1016/j.gexplo.2016.02.013

Cited by 16 publications

(11 citation statements)

References 41 publications

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“…The HA chromitites are also similar in the spinel chemistry and PGE chemistry to arc-related discordant chromitites from northern Oman ophiolite ( Figures 5 and 9). The Fo and NiO contents of olivine in chromitites have been enhanced through subsolidus re-equilibration with chromian spinel [35,36]. Original igneous olivines in the HA chromitites were lower in Fo and Ni contents than the current values.…”

Section: P-t History Of the Higashi-akaishi Chromititementioning

confidence: 69%

Petrology of Chromitites in the Higashi-Akaishi Ultrahigh-Pressure (UHP) Peridotite Complex, Japan: Toward Understanding of General Features of the UHP Chromitites

et al. 2018

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Ultrahigh-pressure (UHP) chromitites containing UHP minerals such as coesite and diamond have been reported from some ophiolites in Tibet and the Polar Urals. Their nature, i.e., origin, P-T path and abundance, however, are still controversial and left unclear. Here we describe chromitites in the Higashi-akaishi (HA) ultramafic complex in the Cretaceous Sanbagawa metamorphic belt, Japan, which experienced UHP condition (up to 3.8 GPa) at the peak metamorphism via subduction, in order to understand the nature of UHP chromitites. The HA peridotites typically contain garnets and are associated with eclogites, and their associated chromitites are expected to have experienced the UHP metamorphism. The Higashi-akaishi (HA) chromitites show banded to massive structures and are concordant to foliation of the surrounding peridotite. Chromian spinels in the chromitite and surrounding peridotites were sometimes fractured by deformation, and contain various inclusions, i.e., blade- and needle-like diopside lamellae, and minute inclusions of pyroxenes, olivine, and pargasite. The peculiar UHP minerals, such as coesite and diamond, have not been found under the microscope and the Raman spectrometer. Spinels in the HA chromitites show high Cr#s (0.7 to 0.85), and low Ti contents (<0.1 wt %), suggesting a genetic linkage to an arc magma. The HA chromitites share the basic petrographic and chemical features (i.e., diopside lamellae and arc-related spinel chemistry) with the UHP chromitites from Tibet and the Polar Urals. This suggests that some of the characteristics of the UHP chromitite can be obtained by compression, possibly via deep subduction, of low-P chromitite.

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Section: P-t History Of the Higashi-akaishi Chromititementioning

confidence: 69%

Petrology of Chromitites in the Higashi-Akaishi Ultrahigh-Pressure (UHP) Peridotite Complex, Japan: Toward Understanding of General Features of the UHP Chromitites

et al. 2018

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“…In general, the lack of any clear correlation between major and trace elements, and δ 53 Cr values may be due to post-magmatic processes (dehydration, serpentinization, metamorphism), which may modify the primary magmatic compositional trends recorded by chromite and silicates (depending on the chromite/silicate ratio), during an extended period of deformation (ductile asthenospheric mantle flow to shallow crustal brittle deformation) [68,[72][73][74][75][76][77][78][79][80]. With respect to the Rhodope massif, on the basis of major-, minor-and trace-element compositions of chromite and Re-Os isotopic compositions of magmatic PGM on the Dobromirtsi chromitites, a long-term history involving reworking of the ancient Archean mantle, during the Phanerozoic, has been suggested [78][79][80][81][82].…”

Section: Post-magmatic Processesmentioning

confidence: 99%

“…In summary, the original geochemical compositions of chromitites may have been modified by subsequent, post-magmatic processes taking place at shallow mantle depths [35][36][37][38]56,57,68,69,[72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87][88][89]97]. The wide range of δ 53 Cr values, from positive, slightly negative to the most negatively fractionated signatures, even present in individual relatively large chromitite deposits, together with negative trends observed between δ 53 Cr values and Cr/(Cr + Al) ratios in chromitites, may reflect a control of Cr isotope compositions in chromitites by degrees of partial melting and by magma fractionation.…”

Section: Weathering Of Cr-bearing Minerals and Environmental Significmentioning

confidence: 99%

Factors Controlling the Chromium Isotope Compositions in Podiform Chromitites

Economou-Eliopoulos

Mitsis

2019

Minerals

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The application of Cr isotope compositions to the investigation of magmatic and post-magmatic effects on chromitites is unexplored. This study presents and compiles the first Cr stable isotope data (δ 53 Cr values) with major and trace element, contents from the Balkan Peninsula, aiming to provide an overview of the compositional variations of δ 53 Cr values in ophiolite-hosted chromitites and to delineate geochemical constraints controlling the composition of chromitites. The studied chromitites exhibit δ 53 Cr values ranging from −0.184% to +0.159% , falling in the range of so-called "igneous Earth" or "Earth's mantle inventory" with values −0.12 ± 0.11% to 0.079 ± 0.129% (2sd). A characteristic feature is the slightly positively fractionated δ 53 Cr values of all chromitite samples from Othrys (+0.043 ± 0.03% ), and the occurrence of a wide range of δ 53 Cr values spanning from positively, slightly negatively to the most negatively fractionated signatures (Pindos, δ 53 Cr = −0.147 to +0.009% ; Skyros, δ 53 Cr = −0.078 to +0.159% ). The observed negative trend between δ 53 Cr values and Cr/(Cr + Al) ratios may reflect a decrease in the δ 53 Cr values of chromitites with increasing partial melting degree. Alternatively, it may point to processes related to magmatic differentiation, as can be seen in our data from Mikrokleisoura (Vourinos).

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“…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]. Among the Western Hellenic Ophiolites is Vourinos ophiolite complex in Western Macedonia, NW Greece, represents a mid-Jurassic complete lithospheric slab about 12 km thick and 400 km 2 and consist of depleted harzburgite mantle which hosts bodies of dunite ranging in size from several meters to kilometers in scale length [8,96,[98][99][100]. Several studies have been conducted in Vourinos and showed that dunite was surrounded by serpentinized harzburgites with some lenses of serpentinized dunite [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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Major and minor element geochemistry of chromite from the Xerolivado–Skoumtsa mine, Southern Vourinos: Implications for chrome ore exploration

Cited by 16 publications

References 41 publications

Petrology of Chromitites in the Higashi-Akaishi Ultrahigh-Pressure (UHP) Peridotite Complex, Japan: Toward Understanding of General Features of the UHP Chromitites

Petrology of Chromitites in the Higashi-Akaishi Ultrahigh-Pressure (UHP) Peridotite Complex, Japan: Toward Understanding of General Features of the UHP Chromitites

Factors Controlling the Chromium Isotope Compositions in Podiform Chromitites

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

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