Articles | Volume 15, issue 2
https://doi.org/10.5194/se-15-167-2024
© Author(s) 2024. 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-15-167-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
08 Feb 2024
Research article |
| 08 Feb 2024
| 08 Feb 2024
Contribution of carbonatite and recycled oceanic crust to petit-spot lavas on the western Pacific Plate
AIST, Geological Survey of Japan, Research Institute of Geology and Geoinformation, Central 7, 1-1-1, Higashi, Tsukuba, Ibaraki, 305-8567, Japan
Graduate School of Science, Tohoku University, 6-3 Aramaki-Aoba, Aoba-ku, Sendai, 980-8578, Japan
Naoto Hirano
Graduate School of Science, Tohoku University, 6-3 Aramaki-Aoba, Aoba-ku, Sendai, 980-8578, Japan
Center for Northeast Asian Studies, Tohoku University, 41 Kawauchi, Aoba-ku, Sendai, 980-8576, Japan
Shiki Machida
Ocean Resources Research Center for Next Generation, Chiba Institution of Technology, 2-17-1 Tsudanuma, Narashino, 275-0016, Japan
Hirochika Sumino
Research Center for Advanced Science and Technology, the University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904, Japan
Norikatsu Akizawa
Atmosphere and Ocean Research Institute, the University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, 277-8564, Japan
Akihiro Tamura
Earth Science Course, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan
Tomoaki Morishita
Earth Science Course, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan
Yasuhiro Kato
Ocean Resources Research Center for Next Generation, Chiba Institution of Technology, 2-17-1 Tsudanuma, Narashino, 275-0016, Japan
Department of Systems Innovation, School of Engineering, the University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
Submarine Resources Research Center, Research Institute for Marine Resources Utilization, Japan Agency for Marine–Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, Kanagawa, 237-0061, Japan
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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.
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Subject area: Tectonic plate interactions, magma genesis, and lithosphere deformation at all scales | Editorial team: Geochemistry, mineralogy, petrology, and volcanology | Discipline: Petrology
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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
Short summary
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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
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.
Plate tectonics theory is the motion of rocky plates (lithosphere) over ductile zones...
