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Mariana serpentinite mud volcanism exhumes subducted seamount materials: implications for the origin of life
Fryer, P, Wheat, CG, Williams, T, Kelley, C, Johnson, K, Ryan, J, Kurz, W, Shervais, J, Albers, E, Bekins, B, Debret, B, Deng, J, Dong, Y, Eickenbusch, P, Frery, E, Ichiyama, Y, Johnston, R, Kevorkian, R, Magalhaes, V, Mantovanelli, S, Menapace, W, Menzies, C, Michibayashi, K, Moyer, C, Mullane, K, Park, J-W, Price, R, Sissmann, O, Suzuki, S, Takai, K, Walter, B, Zhang, R, Amon, Diva, Glickson, D, Pomponi, S
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2020-01-06
Submitted Date
2020-09-11
Subject Terms
Mariana trench
exhumed microbes
subducted cretaceous seamounts
serpentinite mud volcanism
evolution of life
geology
geophysics
volcanology
geochemistry
plate tectonics
astrobiology
exhumed microbes
subducted cretaceous seamounts
serpentinite mud volcanism
evolution of life
geology
geophysics
volcanology
geochemistry
plate tectonics
astrobiology
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Abstract
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.
Citation
Fryer Patricia, Wheat C. Geoffrey, Williams Trevor, Kelley Christopher, Johnson Kevin, Ryan Jeffrey, Kurz Walter, Shervais John, Albers Elmar, Bekins Barbara, Debret Baptiste, Deng Jianghong, Dong Yanhui, Eickenbusch Philip, Frery Emanuelle, Ichiyama Yuji, Johnston Raymond, Kevorkian Richard, Magalhaes Vitor, Mantovanelli Simone, Menapace Walter, Menzies Catriona, Michibayashi Katsuyoshi, Moyer Craig, Mullane Kelli, Park Jung-Woo, Price Roy, Sissmann Olivier, Suzuki Shino, Takai Ken, Walter Bastien, Zhang Rui, Amon Diva, Glickson Deborah and Pomponi Shirley 2020Mariana serpentinite mud volcanism exhumes subducted seamount materials: implications for the origin of lifePhil. Trans. R. Soc. A. 378: 20180425
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Copyright 2020 The Authors. Published by the Royal Society under the terms of the
Creative Commons Attribution License http://creativecommons.org/licenses/
by/4.0/, which permits unrestricted use, provided the original author and
source are credited.
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1364-503X
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1471-2962