Articles | Volume 16, issue 7
https://doi.org/10.5194/se-16-663-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-16-663-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
14 Jul 2025
Research article |
| 14 Jul 2025
| 14 Jul 2025
What do arc magmatism trace-element patterns and Sr–Nd–Pb isotopic data reflect? Insights from the Urumieh–Dokhtar magmatic arc of Iran
Mohammad Reza Ghorbani
CORRESPONDING AUTHOR
Department of Geology, Tarbiat Modares University (TMU), Tehran, 14115-175, Iran
Meysam Akbari
Department of Geology, Tarbiat Modares University (TMU), Tehran, 14115-175, Iran
Research Institute for Earth Sciences, Tehran, 13185-1494, Iran
Ian T. Graham
Earth and Sustainability Science Research Centre, School of Biological, Earth and Environmental Sciences, The University of New South Wales, Sydney, NSW 2052, Australia
Mathieu Benoit
Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées (OSU-OMP), Université de Toulouse, CNRS, IRD, 14 Avenue E. Belin, Toulouse, 31400, France
Fatemeh Sepidbar
Department of Geology, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
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Ibrahima Labou, German Velásquez, Mathieu Benoit, Lenka Baratoux, Didier Béziat, Pierre Debat, and Papa Moussa Ndiaye
EGUsphere, https://doi.org/10.5194/egusphere-2025-814, https://doi.org/10.5194/egusphere-2025-814, 2025
Preprint archived
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Geodynamic significance of the tholeiitic series of the Paleoproterozoic greenstone Mako belt (eastern Senegal, West African Craton) has been emigmatic for long time. Using geochemical and isotopic data on minerals and rocks obtained with electron microprobe and ICP-MS, laser ICP-MS and TIMS techniques, we provide evidence for the existence of two tholeiitic and one calc-alkaline series evolving from an oceanic plateau domain to an island arc domain.
Sophie Demouy, Mathieu Benoit, Michel de Saint-Blanquat, and Jérôme Ganne
Solid Earth Discuss., https://doi.org/10.5194/se-2019-43, https://doi.org/10.5194/se-2019-43, 2019
Preprint withdrawn
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The genesis of the continental crust above subduction zones remains controversial and massive production of granite in short period of time, also named
flare-up eventsare more and more documented but poorly constrained. In the present manuscript we present a detailed geochemical study of samples collected in the Arequipa region (Peru), where a flare-up event is suspected. Using these data, we propose an elegant explanation for the converging geochemical signatures associated to this event.
Related subject area
Subject area: Tectonic plate interactions, magma genesis, and lithosphere deformation at all scales | Editorial team: Geochemistry, mineralogy, petrology, and volcanology | Discipline: Petrology
Hydroxyl in eclogitic garnet, orthopyroxene, and oriented inclusion-bearing clinopyroxene, western Norway
Contribution of carbonatite and recycled oceanic crust to petit-spot lavas on the western Pacific Plate
Yttrium speciation in subduction-zone fluids from ab initio molecular dynamics simulations
Tracing fluid transfers in subduction zones: an integrated thermodynamic and δ18O fractionation modelling approach
Post-entrapment modification of residual inclusion pressure and its implications for Raman elastic thermobarometry
Anatomy of the magmatic plumbing system of Los Humeros Caldera (Mexico): implications for geothermal systems
Alkali basalt from the Seifu Seamount in the Sea of Japan: post-spreading magmatism in a back-arc setting
Magmatic sulfides in high-potassium calc-alkaline to shoshonitic and alkaline rocks
Dirk Spengler, Monika Koch-Müller, Adam Włodek, Simon J. Cuthbert, and Jarosław Majka
Solid Earth, 16, 233–250, https://doi.org/10.5194/se-16-233-2025, https://doi.org/10.5194/se-16-233-2025, 2025
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Western Norwegian “diamond facies” eclogite contains tiny mineral inclusions of quartz and amphibole lamellae that are not stable in the diamond field. Low trace amounts of water in the lamellae-bearing host minerals suggest that the inclusion microstructure was not formed by fluid infiltration but by dehydration during early exhumation of these rocks. Some samples with higher water content argue that a late fluid overprint was spatially restricted and erased evidence of extreme metamorphism.
Kazuto Mikuni, Naoto Hirano, Shiki Machida, Hirochika Sumino, Norikatsu Akizawa, Akihiro Tamura, Tomoaki Morishita, and Yasuhiro Kato
Solid Earth, 15, 167–196, https://doi.org/10.5194/se-15-167-2024, https://doi.org/10.5194/se-15-167-2024, 2024
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Plate tectonics theory is the motion of rocky plates (lithosphere) over ductile zones (asthenosphere). The causes of the lithosphere–asthenosphere boundary (LAB) are controversial; however, petit-spot volcanism supports the presence of melt at the LAB. We conducted geochemistry, geochronology, and geochemical modeling of petit-spot volcanoes on the western Pacific Plate, and the results suggested that carbonatite melt and recycled oceanic crust induced the partial melting at the LAB.
Johannes Stefanski and Sandro Jahn
Solid Earth, 11, 767–789, https://doi.org/10.5194/se-11-767-2020, https://doi.org/10.5194/se-11-767-2020, 2020
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The capacity of aqueous fluids to mobilize rare Earth elements is closely related to their molecular structure. In this study, first-principle molecular dynamics simulations are used to investigate the complex formation of yttrium with chloride and fluoride under subduction-zone conditions. The simulations predict that yttrium–fluoride complexes are more stable than their yttrium–chloride counterparts but likely less abundant due to the very low fluoride ion concentration in natural systems.
Alice Vho, Pierre Lanari, Daniela Rubatto, and Jörg Hermann
Solid Earth, 11, 307–328, https://doi.org/10.5194/se-11-307-2020, https://doi.org/10.5194/se-11-307-2020, 2020
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This study presents an approach that combines equilibrium thermodynamic modelling with oxygen isotope fractionation modelling for investigating fluid–rock interaction in metamorphic systems. An application to subduction zones shows that chemical and isotopic zoning in minerals can be used to determine feasible fluid sources and the conditions of interaction. Slab-derived fluids can cause oxygen isotope variations in the mantle wedge that may result in anomalous isotopic signatures of arc lavas.
Xin Zhong, Evangelos Moulas, and Lucie Tajčmanová
Solid Earth, 11, 223–240, https://doi.org/10.5194/se-11-223-2020, https://doi.org/10.5194/se-11-223-2020, 2020
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In this study, we present a 1-D visco-elasto-plastic model in a spherical coordinate system to study the residual pressure preserved in mineral inclusions. This allows one to study how much residual pressure can be preserved after viscous relaxation. An example of quartz inclusion in garnet host is studied and it is found that above 600–700 °C, substantial viscous relaxation will occur. If one uses the relaxed residual quartz pressure for barometry, erroneous results will be obtained.
Federico Lucci, Gerardo Carrasco-Núñez, Federico Rossetti, Thomas Theye, John Charles White, Stefano Urbani, Hossein Azizi, Yoshihiro Asahara, and Guido Giordano
Solid Earth, 11, 125–159, https://doi.org/10.5194/se-11-125-2020, https://doi.org/10.5194/se-11-125-2020, 2020
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Understanding the anatomy of active magmatic plumbing systems is essential to define the heat source(s) feeding geothermal fields. Mineral-melt thermobarometry and fractional crystallization (FC) models were applied to Quaternary volcanic products of the Los Humeros Caldera (Mexico). Results point to a magmatic system controlled by FC processes and made of magma transport and storage layers within the crust, with significant implications on structure and longevity of the geothermal reservoir.
Tomoaki Morishita, Naoto Hirano, Hirochika Sumino, Hiroshi Sato, Tomoyuki Shibata, Masako Yoshikawa, Shoji Arai, Rie Nauchi, and Akihiro Tamura
Solid Earth, 11, 23–36, https://doi.org/10.5194/se-11-23-2020, https://doi.org/10.5194/se-11-23-2020, 2020
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We report a peridotite xenolith-bearing basalt dredged from the Seifu Seamount (SSM basalt) in the northeast Tsushima Basin, southwest Sea of Japan, which is one of the western Pacific back-arc basin swarms. An 40Ar / 39Ar plateau age of 8.33 ± 0.15 Ma (2 σ) was obtained for the SSM basalt, indicating that it erupted shortly after the termination of back-arc spreading. The SSM basalt was formed in a post-back-arc extension setting by the low-degree partial melting of an upwelling asthenosphere.
Ariadni A. Georgatou and Massimo Chiaradia
Solid Earth, 11, 1–21, https://doi.org/10.5194/se-11-1-2020, https://doi.org/10.5194/se-11-1-2020, 2020
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We study the petrographical and geochemical occurrence of magmatic sulfide minerals in volcanic rocks for areas characterised by different geodynamic settings, some of which are associated with porphyry (Cu and/or Au) and Au epithermal mineralisation. The aim is to investigate the role of magmatic sulfide saturation processes in depth for ore generation in the surface.
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Short summary
The vast Cenozoic arc magmatism of Iran introduced three distinct rock series. The LILE (large-ion lithophile elements)-rich and LILE-poor series show signatures of fluid-rich and fluid-poor slab-melt mantle metasomatism, furnished by hot slab subduction. The slab was more hydrated in the northern segment of the study area, where the LILE-rich series dominates. The third series rich in incompatible trace elements, the ITE-rich series, indicates the input of asthenosphere as well.
The vast Cenozoic arc magmatism of Iran introduced three distinct rock series. The LILE...
