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      Magmatic Response to Subduction Initiation, Part II: Boninites and Related Rocks of the Izu‐Bonin Arc From IOPD Expedition 352

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          Mariana serpentinite mud volcanism exhumes subducted seamount materials: implications for the origin of life

          The subduction of seamounts and ridge features at convergent plate boundaries plays an important role in the deformation of the overriding plate and influences geochemical cycling and associated biological processes. Active serpentinization of forearc mantle and serpentinite mud volcanism on the Mariana forearc (between the trench and active volcanic arc) provides windows on subduction processes.  Here, we present (1) the first observation of an extensive exposure of an undeformed Cretaceous seamount currently being subducted at the Mariana Trench inner slope; (2) vertical deformation of the forearc region related to subduction of Pacific Plate seamounts and thickened crust; (3) recovered Ocean Drilling Program and International Ocean Discovery Program cores of serpentinite mudflows that confirm exhumation of various Pacific Plate lithologies, including subducted reef limestone; (4) petrologic, geochemical and paleontological data from the cores that show that Pacific Plate seamount exhumation covers greater spatial and temporal extents; (5) the inference that microbial communities associated with serpentinite mud volcanism may also be exhumed from the subducted plate seafloor and/or seamounts; and (6) the implications for effects of these processes with regard to evolution of life. This article is part of a discussion meeting issue ‘Serpentine in the Earth system’.
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            Boninites and Related Rocks

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              Boninite and related rocks of Chichi-jima, Bonin Islands, Japan

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                Author and article information

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                Journal
                Geochemistry, Geophysics, Geosystems
                Geochem Geophys Geosyst
                American Geophysical Union (AGU)
                1525-2027
                1525-2027
                January 2021
                January 12 2021
                January 2021
                : 22
                : 1
                Affiliations
                [1 ]Department of Geology Utah State University Logan UT USA
                [2 ]Department of Earth and Environmental Science University of Iowa Iowa City IA USA
                [3 ]Géosciences Montpellier CNRS Université de Montpellier Montpellier France
                [4 ]Department of Earth Sciences University of Durham Durham UK
                [5 ]School of Geosciences University of South Florida Tampa FL USA
                [6 ]School of Earth & Ocean Sciences Cardiff University Cardiff UK
                [7 ]Leibniz Universität Hannover Institut für Mineralogie Hannover Germany
                [8 ]State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou P.R. China
                [9 ]Now at Department of Geology California State University Sacramento CA USA
                [10 ]School of Geosciences University of Sydney Sydney NSW Australia
                [11 ]Earth Sciences School of Environmental and Rural Sciences University of New England Armidale NSW Australia
                [12 ]Institute of Earth Sciences NAWI Graz Geocenter University of Graz Austria
                [13 ]Department of Physics, Astronomy, and Geosciences Towson University Towson MD USA
                [14 ]CEOAS Oregon State University Corvallis OR USA
                [15 ]Institut für Mineralogie Universität zu Köln Köln Germany
                [16 ]Kochi Institute for Core Sample Research Japan Agency for Marine‐Earth Science and Technology Kochi Japan
                [17 ]Department of Science Osaka University Osaka Japan
                [18 ]Department of Geology Centenary College Shreveport LA USA
                [19 ]Institute of Geology Chinese Academy of Geological Science Beijing P.R. China
                [20 ]Department of Geosciences King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia
                Article
                10.1029/2020GC009093
                90409245-8b8b-433f-a124-5e8f33cf970b
                © 2021

                http://onlinelibrary.wiley.com/termsAndConditions#vor

                http://doi.wiley.com/10.1002/tdm_license_1.1

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