Workshop report
| 
26 Apr 2021
Workshop report |
| 26 Apr 2021
| 26 Apr 2021
Workshop report: Exploring deep oceanic crust off Hawai`i
Susumu Umino
CORRESPONDING AUTHOR
School of Geosciences and Civil Engineering, College of Science and
Engineering, Kanazawa University, Kanazawa 920-1192, Japan
Gregory F. Moore
Department of Earth Sciences, University of Hawai`i at Mānoa,
Honolulu, HI 96822, USA
Brian Boston
Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA
Rosalind Coggon
School of Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Southampton SO14 3ZH, UK
Laura Crispini
Department of Earth, Environment and Life Sciences, University of Genoa, 16126 Genoa, Italy
Steven D'Hondt
Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, USA
Michael O. Garcia
Department of Earth Sciences, University of Hawai`i at Mānoa,
Honolulu, HI 96822, USA
Takeshi Hanyu
Research Institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka 237-0061, Japan
Frieder Klein
Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
Nobukazu Seama
Department of Planetology, Graduate School of Science, Kobe Ocean-Bottom Exploration Center (KOBEC), Kobe University, Kobe 657-8501, Japan
Damon A. H. Teagle
School of Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Southampton SO14 3ZH, UK
Masako Tominaga
Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
Mikiya Yamashita
Research Institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka 237-0061, Japan
Institute of Geology and Geoinformation, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8567, Japan
Michelle Harris
School of Geography, Earth and Environmental Sciences, University of Plymouth, Plymouth PL4 8AA, UK
Benoit Ildefonse
Geosciences Montpellier, University of Montpellier, CNRS, Montpellier, France
Ikuo Katayama
Department of Earth and Planetary System Sciences, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
Yuki Kusano
Research Institute of Earthquake and Volcano Geology, AIST, Tsukuba 305-8567, Japan
Yohey Suzuki
Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan
Elizabeth Trembath-Reichert
School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287-6004, USA
Yasuhiro Yamada
Mantle Drilling Promotion Office, Institute for Marine-Earth Exploration and Engineering (MarE3), JAMSTEC, Yokohama 236-0001, Japan
Natsue Abe
Mantle Drilling Promotion Office, Institute for Marine-Earth Exploration and Engineering (MarE3), JAMSTEC, Yokohama 236-0001, Japan
Nan Xiao
Mantle Drilling Promotion Office, Institute for Marine-Earth Exploration and Engineering (MarE3), JAMSTEC, Yokohama 236-0001, Japan
Mantle Drilling Promotion Office, Institute for Marine-Earth Exploration and Engineering (MarE3), JAMSTEC, Yokohama 236-0001, Japan
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Luigi Massaro, Jürgen Adam, Elham Jonade, Silvia Negrão, and Yasuhiro Yamada
Solid Earth, 16, 531–550, https://doi.org/10.5194/se-16-531-2025, https://doi.org/10.5194/se-16-531-2025, 2025
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In this manuscript, we investigated the kinematics and dynamics of strike-slip damage zones using laboratory mechanical tests and analogue modelling techniques. The results underline the importance of a multi-scale approach (from crustal to outcrop-scale) to improve the understanding of such deformation processes, deriving fundamental correlations with the physical and mechanical properties of the model materials applied in the experiments.
Mohammed Hashim, Lukas Marx, Frieder Klein, Chloe Dean, Emily Burdige, Matthew Hayden, Daniel McCorkle, and Adam Subhas
EGUsphere, https://doi.org/10.5194/egusphere-2025-988, https://doi.org/10.5194/egusphere-2025-988, 2025
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Ocean alkalinity enhancement (OAE) is a CO2 removal approach that involves the addition of alkaline substances to seawater that would allow it to absorb more atmospheric CO2. Increasing seawater alkalinity, however, can trigger mineral precipitation that decreases OAE efficiency. We conducted experiments to constrain the thermodynamic and kinetics of mineral precipitation.
Sune G. Nielsen, Frieder Klein, Horst R. Marschall, Philip A. E. Pogge von Strandmann, and Maureen Auro
Solid Earth, 15, 1143–1154, https://doi.org/10.5194/se-15-1143-2024, https://doi.org/10.5194/se-15-1143-2024, 2024
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Magnesium isotope ratios of arc lavas have been proposed as a proxy for serpentinite subduction, but uncertainties remain regarding their utility. Here we show that bulk serpentinite Mg isotope ratios are identical to the mantle, whereas the serpentinite mineral brucite is enriched in heavy Mg isotopes. Thus, Mg isotope ratios may only be used as serpentinite subduction proxies if brucite is preferentially mobilized from the slab at pressures and temperatures within the arc magma source region.
Silvia Fornasaro, Paola Comodi, Laura Crispini, Sandro Zappatore, Azzurra Zucchini, and Pietro Marescotti
Eur. J. Mineral., 35, 1091–1109, https://doi.org/10.5194/ejm-35-1091-2023, https://doi.org/10.5194/ejm-35-1091-2023, 2023
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Using an innovative multi-analytical approach, we investigated the trace elements composition of spinel-group minerals in different ultramafic rocks from the Voltri Massif (Central Liguria, NW Italy). The knowledge of the trace elements within these minerals has an interesting implication both in petrological, mineralogical, and geochemical studies as well as environmental fields, since these elements can be potentially toxic and released into the environment during weathering processes.
Mathieu Rospabé, Fatma Kourim, Akihiro Tamura, Eiichi Takazawa, Manolis Giampouras, Sayantani Chatterjee, Keisuke Ishii, Matthew J. Cooper, Marguerite Godard, Elliot Carter, Natsue Abe, Kyaw Moe, Damon A. H. Teagle, and Oman Drilling Project “ChikyuOman2018 Leg 3” Science
Team
Sci. Dril., 30, 75–99, https://doi.org/10.5194/sd-30-75-2022, https://doi.org/10.5194/sd-30-75-2022, 2022
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During ChikyuOman2018 Leg3, we adapted a sample preparation and analytical procedure in order to analyse (ultra-)trace element concentrations using the D/V Chikyu on-board instrumentation. This dry (acid-free) and safe method has been developed for the determination of 37 elements (lowest reachable concentrations: 1–2 ppb) in igneous rocks from the oceanic lithosphere and could be adapted to other materials and/or chemicals of interest in the course of future ocean drilling operations.
Valentin Basch, Martyn R. Drury, Oliver Plumper, Eric Hellebrand, Laura Crispini, Fabrice Barou, Marguerite Godard, and Elisabetta Rampone
Eur. J. Mineral., 33, 463–477, https://doi.org/10.5194/ejm-33-463-2021, https://doi.org/10.5194/ejm-33-463-2021, 2021
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This paper investigates the possibility for melts to migrate within extensively deformed crystals and assesses the impact of this intracrystalline melt percolation on the chemical composition of the deformed crystal. We here document that the presence of melt within a crystal greatly enhances chemical diffusive re-equilibration between the percolating melt and the mineral and that such a process occurring at crystal scale can impact the large-scale composition of the oceanic lithosphere.
Arianne J. Petley-Ragan, Oliver Plümper, Benoit Ildefonse, and Bjørn Jamtveit
Solid Earth, 12, 959–969, https://doi.org/10.5194/se-12-959-2021, https://doi.org/10.5194/se-12-959-2021, 2021
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Earthquakes cause rapid deformation that has long-term effects on the Earth's crust. We studied the most abundant mineral, feldspar, in the vicinity of an earthquake to unravel its deformation history. With microscopy, we found internal nm-scale structures that indicate a history of high stress and destruction of atomic structure. This was quickly followed by high temperature and fluid introduction within seconds. Our findings illustrate the intense conditions imposed on rocks by earthquakes.
Hanaya Okuda, Ikuo Katayama, Hiroshi Sakuma, and Kenji Kawai
Solid Earth, 12, 171–186, https://doi.org/10.5194/se-12-171-2021, https://doi.org/10.5194/se-12-171-2021, 2021
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Serpentinite, generated by the hydration of ultramafic rocks, is thought to be related to slow earthquakes at the subduction plate interface in the mantle wedge. We conducted friction experiments on brucite, one of the components of serpentinite, and found that wet brucite exhibits low and unstable friction under low effective normal stress conditions. This result suggests that wet brucite may be key for slow earthquakes at the subduction plate interface in a hydrated mantle wedge.
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