Stéphane Rouméjon
ETH Zurich
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Publication
Featured researches published by Stéphane Rouméjon.
Journal of Petrology | 2018
Stéphane Rouméjon; Gretchen L. Früh-Green; Beth N. Orcutt; S.L. Green; Carol J. Cotterill; Sally Morgan; Norikatsu Akizawa; G. Bayrakci; Jan Hinrich Behrmann; Emilio Herrero-Bervera; Chiara Boschi; William J. Brazelton; Mathilde Cannat; Kristina G. Dunkel; J. Escartin; Michelle Harris; Kirsten Hesse; Barbara E. John; Susan Q. Lang; Marvin D. Lilley; Hai-Quan Liu; Lisa E. Mayhew; Andrew McGaig; Bénédicte Ménez; Yuki Morono; Marianne Quéméneur; Amila Sandaruwan Ratnayake; Matthew O. Schrenk; Esther M. Schwarzenbach; Katrina I. Twing
Serpentinized and metasomatized peridotites intruded by gabbros and dolerites have been drilled on the southern wall of the Atlantis Massif (Mid-Atlantic Ridge, 30°N) during International Ocean Discovery Program (IODP) Expedition 357. They occur in seven holes from five sites making up an east-west trending, spreading-parallel profile that crosscuts this exhumed detachment footwall. Here we have taken advantage of this sampling to study heterogeneities of alteration at scales less than a kilometer. We combine textural and mineralogical observations made on 77 samples with in situ major and trace element analyses in primary and serpentine minerals to provide a conceptual model for the development of alteration heterogeneities at the Atlantis Massif. Textural sequences and mineralogical assemblages reveal a transition between an initial pervasive phase of serpentinization and subsequent serpentinization and metasomatism focused along localized pathways preferentially used by hydrothermal fluids. We propose that these localized pathways are interconnected and form 100 m- to 1u2009km-sized cells in the detachment footwall. This change in fluid pathway distribution is accompanied by variable trace element enrichments in the serpentine textures: deep, syn-serpentinization fluid-peridotite interactions are considered the source of Cu, Zn, As, and Sb enrichments, whereas U and Sr enrichments are interpreted as markers of later, shallower fluid-serpentinized peridotite interaction. Alteration of gabbros and dolerites emplaced in the peridotite at different lithospheric levels leads to the development of amphibole, chlorite and, or, talc-bearing textures as well as enrichments in LREE, Nb, Y, Th, Ta in the serpentine textures of the surrounding peridotites. Combining these observations, we propose a model that places the drill holes in a conceptual frame involving mafic intrusions in the peridotites and heterogeneities during progressive alteration and emplacement on the seafloor.
Nature Geoscience | 2013
Daniel Sauter; Mathilde Cannat; Stéphane Rouméjon; Muriel Andreani; Dominique Birot; Adrien Bronner; Daniele Brunelli; Julie Carlut; Adélie Delacour; Vivien Guyader; Christopher J. MacLeod; Gianreto Manatschal; Véronique Mendel; Bénédicte Ménez; Valerio Pasini; Etienne Ruellan; Roger C. Searle
Earth and Planetary Science Letters | 2017
Baptiste Debret; Muriel Andreani; Adélie Delacour; Stéphane Rouméjon; Nicolas Trcera; H. M. Williams
Proceedings of the Ocean Discovery Program, 357 . | 2017
Gretchen L. Früh-Green; Beth N. Orcutt; S.L. Green; Carol J. Cotterill; Sally Morgan; Norikatsu Akizawa; G. Bayrakci; Jan Hinrich Behrmann; Chiara Boschi; W.J. Brazleton; Mathilde Cannat; Kristina G. Dunkel; J. Escartin; Michelle Harris; Emilio Herrero-Bervera; Kirsten Hesse; Barbara E. John; Susan Q. Lang; Lilley; Hai-Quan Liu; Lisa E. Mayhew; Andrew M. McCaig; Bénédicte Ménez; Yuki Morono; Marianne Quéméneur; Stéphane Rouméjon; A. Sandaruwan Ratnayake; Matthew O. Schrenk; Esther M. Schwarzenbach; Katrina I. Twing
Geophysical Journal International | 2017
Ismael Falcon-Suarez; G. Bayrakci; Timothy A. Minshull; Laurence North; Angus I. Best; Stéphane Rouméjon
Proceedings of the International Ocean Discovery Program, 357 . | 2017
Gretchen L. Früh-Green; Beth N. Orcutt; S.L. Green; Carol J. Cotterill; Sally Morgan; Norikatsu Akizawa; G. Bayrakci; Jan Hinrich Behrmann; Chiara Boschi; W. J. Brazleton; Mathilde Cannat; Kristina G. Dunkel; J. Escartin; Michelle Harris; Emilio Herrero-Bervera; Kirsten Hesse; Barbara E. John; Susan Q. Lang; Marvin D. Lilley; Hai-Quan Liu; Lisa E. Mayhew; Andrew M. McCaig; Bénédicte Ménez; Yuki Morono; Marianne Quéméneur; Stéphane Rouméjon; A. Sandaruwan Ratnayake; Matthew O. Schrenk; Esther M. Schwarzenbach; Katrina I. Twing
Journal of Geophysical Research | 2012
Benjamin Malvoisin; Fabrice Brunet; Julie Carlut; Stéphane Rouméjon; Mathilde Cannat
Lithos | 2018
Gretchen L. Früh-Green; Beth N. Orcutt; Stéphane Rouméjon; Marvin D. Lilley; Yuki Morono; Carol J. Cotterill; S.L. Green; J. Escartin; Barbara E. John; Andrew M. McCaig; Mathilde Cannat; Bénédicte Ménez; Esther M. Schwarzenbach; M. Williams; Sally Morgan; Susan Q. Lang; Matthew O. Schrenk; William J. Brazelton; Norikatsu Akizawa; Chiara Boschi; Kristina G. Dunkel; Marianne Quéméneur; Scott A. Whattam; Lisa E. Mayhew; Michelle Harris; G. Bayrakci; Jan Hinrich Behrmann; Emilio Herrero-Bervera; Kirsten Hesse; Hai-Quan Liu
Lithos | 2018
Stéphane Rouméjon; M. Williams; Gretchen L. Früh-Green
Geochemistry Geophysics Geosystems | 2018
J. Liebmann; Esther M. Schwarzenbach; Gretchen L. Früh-Green; C. Boschi; Stéphane Rouméjon; H. Strauss; Uwe Wiechert; Timm John