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161 results on '"Bollinger C."'

3. Amsterdam-St Paul Hotspot: Evidence for multiple phases of activity

Author

Janin, M., Maia, M., Guillou, H., Hemond, C., Bollinger, C., Domaines Océaniques (LDO), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences du Climat et de l'Environnement (LSCE), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)

Subjects
[SDU]Sciences of the Universe [physics]
Abstract

International audience; The construction of the Amsterdam-St. Paul (ASP) plateau is related to the interaction between the Southeast Indian Ridge (SEIR) and the ASP hotspot. A chain of seamounts located to the NE of the Plateau has been K/Ar dated and appears too young to be the track of ASP hotspot on the Australian plate [Janin et al., 2008]. However, new age data from the area show that this chain was formed during two different stages, the first one being younger than 2 My, and the other much older. The two types of seamounts have different morphologies. The younger ones are smaller and elongated while the older ones are more massive [Maia et al., in prep] The two types of seamounts can be distinguished using their geochemical composition which is highly alkaline for both. The youngest ones are very enriched with (La/Sm)norm higher than 3. The oldest ones are also enriched but not as much with (La/Sm)norm between 2.5 and 2.8. A heterogeneous enriched mantle as the source of them could be an explanation but according to the geochronological constraints we consider that the old seamounts are related to the expression of the ASP plume on the Australian plate while the young ones result of melting due to a crustal crack over an enriched mantle. The construction of ASP Plateau is also the result of several phases in the hotspot activity. Geophysical observations established that the ASP-SEIR system is conditioned by plume flux variations and by the relative movement between the plume and the spreading center [Maia et al., 2008]. Geochemical data analyses confirm that the intensity of the interaction between the plume and the ridge fluctuated in time. The oldest lavas (about 3 +/- 0.5 My old) have a stronger hotspot signature than the 1.5 My old lavas, but weaker than the most recent ones.

Published
2023

7. The Chicago Meeting, December 29–30, 1947

Author

Byers, H. R., Saucier, Walter J., Bollinger, C. J., Brooks, Edward M., Brunk, Ivan W., Jehn, Kenneth H., Palmén, Erik, Suomi, Verner E., Neiburger, Morris, Wurtele, Morton G., Harney, Patrick J., Barrett, Earl W., Bledsoe,, John D., Moses, Harry, Hull, Edwin C., Langwell, Patricia A., Cox, Everett F., Atanasoff, J. V., and Snavely, B. L.

Published
1948

12. New dedicated methods for the improvement of quantitative in-situ TEM nanomechanical testing

Author

UCL - SST/IMMC/IMAP - Materials and process engineering, University of Antwerp - EMAT, University of Bayreuth - Bayerisches Geoinstitut, Université de Lille - Unité Matériaux et Transformations, Idrissi, Hosni, Samaeeaghmiyoni, V., Bollinger, C., Boioli, F., Gatti, R., Devincre, B., Cordier, P., Pardoen, Thomas, Schryvers, Dominique, European Mechanics of Material Conference (EMMC16), UCL - SST/IMMC/IMAP - Materials and process engineering, University of Antwerp - EMAT, University of Bayreuth - Bayerisches Geoinstitut, Université de Lille - Unité Matériaux et Transformations, Idrissi, Hosni, Samaeeaghmiyoni, V., Bollinger, C., Boioli, F., Gatti, R., Devincre, B., Cordier, P., Pardoen, Thomas, Schryvers, Dominique, and European Mechanics of Material Conference (EMMC16)

Abstract

n/a

Published
2018

13. Dislocation based plasticity: new insights from quantitative in-situ TEM tensile testing

Author

UCL - SST/IMMC/IMAP - Materials and process engineering, Idrissi, Hosni, Samaeeaghmiyoni, V., Bollinger, C., Boioli, F., Gatti, R., Devincre, B., Cordier, P., Pardoen, Thomas, Schryvers, Dominique, Schöntal Symposium on ‘Dislocation based Plasticity’, UCL - SST/IMMC/IMAP - Materials and process engineering, Idrissi, Hosni, Samaeeaghmiyoni, V., Bollinger, C., Boioli, F., Gatti, R., Devincre, B., Cordier, P., Pardoen, Thomas, Schryvers, Dominique, and Schöntal Symposium on ‘Dislocation based Plasticity’

Abstract

n/a

Published
2018

16. Report on the Kansas City Meeting, Jan. 24-26, 1945

Author

Brooks, Charles F., Byers, Horace R., McDowell, Dawson C., Smith, H. F., Kolb, L. L., Minser, E. J., Gage, R. A., Hall, H. E., Namias, Jerome, Fulks, J. R., Neiburger, Morris, Beer, Charles G. P., Leopold, Luna B., Buell, C. E., Jones, W. W., Carpenter, Archer B., Bollinger, C. J., Bice, E. G., Stevens, G. T., Suomi, Verner E., Moses, Harry, Bernheisel, W. F., True, A. E., Hall, Ferguson, Burhoe, Ralph W., Van Thullenar, C. F., and Willett, Hurd C.

Published
1945

18. Pore water geochemistry at two seismogenic areas in the Sea of Marmara

Author

Ruffine L., Germain Y., Polonia A., De Prunele A., Croguennec C., Donval J.-P., Pitel-Roudaut M., Ponzevera E., Caprais J.-C., Brandily C., Grall C., Bollinger C., Geli L., and Gasperini L.

Subjects
Sea of Marmara, North Anatolian Fault, pore water geochemistry, anaerobic oxidation of methane, seismic activity
Abstract

Within the Sea of Marmara, the highly active North Anatolian Fault (NAF) is responsible for major earthquakes (Mw>=7), and acts as a pathway for fluid migration from deep sources to the seafloor. This work reports on pore water geochemistry from three sediment cores collected in the Gulfs of Izmit and Gemlik, along the Northern and the Middle strands of the NAF, respectively. The resulting data set shows that anaerobic oxidation of methane (AOM) is the major process responsible for sulfate depletion in the shallow sediment. In the Gulf of Gemlik, depth concentration profiles of both sulfate and alkalinity exhibit a kink-type profile. The Sulfate Methane Transition Zone (SMTZ) is located at moderate depth in the area. In the Gulf of Izmit, the low concentrations observed near the seawater-sediment interface for sulfate, calcium, strontium, and magnesium result from rapid geochemical processes, AOM, and carbonate precipitation, occurring in the uppermost part of the sedimentary column and sustained by free methane accumulation. Barite dissolution and carbonate recrystallization have also been identified at deeper depth at the easternmost basin of the Gulf of Izmit. This is supported by the profile of the strontium isotope ratios (87Sr/86Sr) as a function of depth which exhibits negative anomalies compared to the modern seawater value. The strontium isotopic signature also shows that these carbonates had precipitated during the reconnection of the Sea of Marmara with the Mediterranean Sea. Finally, a first attempt to interpret the sulfate profiles observed in the light of the seismic activity at both sites is presented. We propose the hypothesis that seismic activity in the areas is responsible for the transient sulfate profile, and that the very shallow SMTZ depths observed in the Gulf of Izmit is likely due to episodic release of significant amount of methane.

Published
2015

19. Evidence from Tm anomalies for non-CI refractory lithophile element proportions in terrestrial planets and achondrites

Author

Barrat, Jean-alix, Dauphas, N., Gillet, P., Bollinger, C., Etoubleau, Joel, Bischoff, A., Yamaguchi, A., Barrat, Jean-alix, Dauphas, N., Gillet, P., Bollinger, C., Etoubleau, Joel, Bischoff, A., and Yamaguchi, A.

Abstract

Thulium is a heavy rare earth element (REE) whose geochemical behavior is intermediate between Er and Yb, and that is not expected to be decoupled from these elements during accretion of planetary bodies and geological processes. However, irregularities in REE volatilities at higher temperature could have decoupled the REEs relative to one another during the early stages of condensation of the solar nebula. Indeed, positive Tm anomalies are found in some refractory inclusions from carbonaceous chondrites, and it is possible that large scale nebular reservoirs displaying positive or negative Tm anomalies were formed during the early history of the solar system. We analyzed a series of meteorites and terrestrial rocks in order to evaluate the existence of Tm anomalies in planetary materials. Relative to CIs (Ivuna-type carbonaceous chondrites), carbonaceous chondrites display unresolved or positive Tm anomalies, while most of the noncarbonaceous chondrites show slightly negative Tm anomalies. Quantification of these anomalies in terrestrial samples is complicated when samples display fractionated heavy REE patterns. Taking this effect into account, we show that the Earth, Mars, Vesta, the aubrite and ureilite parent bodies display small negative anomalies (Tm/Tm∗≈0.975), very similar to those found in ordinary and enstatite chondrites. We suggest that a slight negative Tm anomaly relative to CI is a widespread feature of the materials from the inner solar system. This finding suggests that CI chondrites may not be appropriate for normalizing REE abundance patterns of most planetary materials as they may be enriched in a high-temperature refractory component with non-solar composition. The presence of Tm anomalies at a bulk planetary scale is, to this day, the strongest piece of evidence that refractory lithophile elements are not present in constant proportions in planetary bodies.

Published
2016
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21. Small-scale plasticity mechanisms in crystalline and amorphous materials revealed by in-situ TEM nanomechanical testing

Author

UCL - SST/IMMC/IMAP - Materials and process engineering, UCL - SST/ICTM/ELEN - Pôle en ingénierie électrique, Idrissi, Hosni, Amin-Ahmadi, B., Colla, Marie-Stéphane, Bollinger, C., Boioli, F., Raskin, Jean-Pierre, Cordier, P., Pardoen, Thomas, Schryvers, Dominique, European-MRS Fall Meeting, UCL - SST/IMMC/IMAP - Materials and process engineering, UCL - SST/ICTM/ELEN - Pôle en ingénierie électrique, Idrissi, Hosni, Amin-Ahmadi, B., Colla, Marie-Stéphane, Bollinger, C., Boioli, F., Raskin, Jean-Pierre, Cordier, P., Pardoen, Thomas, Schryvers, Dominique, and European-MRS Fall Meeting

Abstract

n/a

Published
2015

23. Advances in high-pressure materials rheology: from single-crystal to aggregate plasticity

Author

Detrez, Fabrice, Castelnau, O, Raterron, P, Cordier, P, Merkel, Sébastien, Bollinger, C, Hilairet, N, Laboratoire de Modélisation et Simulation Multi Echelle (MSME), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université Paris-Est Marne-la-Vallée (UPEM), Procédés et Ingénierie en Mécanique et Matériaux [Paris] (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Centre National de la Recherche Scientifique (CNRS), Unité Matériaux et Transformations - UMR 8207 (UMET), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut National de la Recherche Agronomique (INRA), ANR-08-BLAN-0238,Mantle Rheology,Multi-scale Investigation of Upper-Mantle Rheology: From High-P Experiments to Micromechanical Modeling(2008), Université Paris-Est Marne-la-Vallée (UPEM)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Institut de Chimie du CNRS (INC)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL), Detrez, Fabrice, and Blanc - Multi-scale Investigation of Upper-Mantle Rheology: From High-P Experiments to Micromechanical Modeling - - Mantle Rheology2008 - ANR-08-BLAN-0238 - BLANC - VALID

Subjects
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], [SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], Astrophysics::Earth and Planetary Astrophysics, [SPI.MECA.MEMA] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], Physics::Geophysics
Abstract

International audience; The strongly anisotropic rheology of olivine and pyroxene single grains, associated to polycrystal microstructures, constitutes a key feature affecting the dynamics of the Earth's upper mantle. High pressure deformation experiments carried out on olivine single crystals under synchrotron radiation, together with estimations of lattice friction based on first-principle calculations, show a transition from easy [100] to easy [001] slips as pressure and temperature (thus depth) increases. Besides dislocation glide, diffusion related deformation mechanisms such as dislocation climb, diffusional creep, and grain boundary sliding cannot be completely ruled out. Since their behavior is poorly known, they are grouped into a single isotropic viscous component. We input these elementary deformation mechanisms into a mean-field homogenization scheme (second-order self-consistent scheme of Ponte-Castaneda) to assess the respective activation of deformation mechanisms and microstructure evolution (crystallographic texture) of olivine and olivine-pyroxene polycrystalline aggregates, for several flow path representative of in situ deformation.

Published
2013

24. Viscoplastic behavior of multiphase Earth mantle polycrystals inferred from micromechanical modeling

Author

Castelnau, O., Detrez, Fabrice, Bollinger, C., Cordier, P., Hilairet, N., Merkel, S., Raterron, P., Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Laboratoire de Modélisation et Simulation Multi Echelle (MSME), Université Paris-Est Marne-la-Vallée (UPEM)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL), American Geophysical Union, Procédés et Ingénierie en Mécanique et Matériaux [Paris] (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université Paris-Est Marne-la-Vallée (UPEM), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut National de la Recherche Agronomique (INRA), Detrez, Fabrice, Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), and Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [SDE.MCG] Environmental Sciences/Global Changes, [PHYS.MECA.MEMA] Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [PHYS.PHYS.PHYS-GEO-PH] Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [SDE.MCG]Environmental Sciences/Global Changes, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], [SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], [SPI.MECA.MEMA] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]
Published
2012

25. Enoxaparin followed by once-weekly idrabiotaparinux versus enoxaparin plus warfarin for patients with acute symptomatic pulmonary embolism: a randomised, double-blind, double-dummy, non-inferiority trial

Author

Büller, Hr, Gallus, As, Prins, Mh, Raskob, G, Decousus, H, Charbonnier, B, Leizorovicz, A, Laporte, S, Quenet, S, Brandjes, Dp, Middeldorp, S, Blüguermann, J, Amuchastegui, L, Ahuad Guerrero, R, Oberti, P, Alvarez, C, Cassettari, A, Santos, D, Macin, S, Santini, F, Ward, C, Coughlin, P, Salem, H, Gan, E, Leyden, M, Prosser, I, Crispin, P, Carroll, P, Gallus, A, Mcrae, S, Waites, J, Pilger, E, Koppensteiner, R, Kyrle, P, Schinko, H, Mrochek, A, Mitkovskaya, N, Prystrom, A, Motte, S, Ninane, V, Delcroix, M, Hainaut, P, Schneider, E, Saraiva, J, Maia, L, Barreto, S, Fernandes Manenti, E, Araujo, G, Dutra, O, Fiss, E, Moreira, R, Yankov, K, Nenkova, S, Ivanov, Y, Kostov, V, Bhargava, R, Chan, Y, Miron, Mj, Cusson, J, Ugarte, S, Morales, A, Andresen, M, Lanas, F, Arriagada, G, Mendoza, Jj, Zuñiga, C, Sepulveda, P, Wang, C, Liu, Z, Yuan, Y, Ma, Z, Fang, B, Liu, J, Bai, C, Wu, H, Yang, L, Ying, K, Kang, J, Li, Q, Cheng, Z, Zhang, J, Wang, H, Xie, C, Xia, G, Du, Y, Wu, Q, Zhou, X, Chen, L, Yi, Q, Wu, C, Hao, Q, Liu, S, Xiong, S, Jiang, S, Zhao, L, Xiao, Q, Qin, Z, Zhou, J, Dennis, R, Miserque, N, Igueredo, M, Londoño, D, Hildebrando, J, Granados, M, Buitrago, R, Solano, Mh, Pacheco Alvis PM, Botero, R, Saenz, O, Bergovec, M, Padovan, M, Vucic, N, Samarzija, M, Chlumsky, J, Spacek, R, Klimsa, Z, Gregor, P, Povolny, J, Podpera, I, Holm, F, Lang, P, Matoska, P, Sabl, P, Spinar, J, Spac, J, Husted, S, Avnstrom, S, Rasmussen, S, Christensen, A, Guindy, R, Hassanein, M, Paumets, M, Meriste, S, Ferrari, E, Achkar, A, Azarian, R, Meneveau, N, Lorut, C, Mouallem, J, Crestani, B, Proton, A, Salmeron, S, Lerousseau, L, Mottier, D, Wahl, D, Siafakas, N, Papadimitriou, D, Katis, K, Katsaris, G, Gaga, A, Damianos, A, Tipparaju, S, Kalkunte, S, Vidhut, J, Kalashetti, S, Mehta, P, Talwar, D, Ramanathan, R, Mishra, R, Zeltzer, D, Lahav, M, Brenner, B, Caraco, Y, Elias, M, Piovella, F, Barone, M, Poggio, R, Palla, A, Ghirarduzzi, A, Pini, M, Lodigiani, C, Prandoni, Paolo, Agnelli, G, Imberti, D, Scannapieco, G, Salvi, A, Bautista, E, Diaz, J, Mercado, R, Ranero, A, Rodriguez, D, Jerjes, C, Villeda Espinoza, E, Van Der Meer, J, Ijfering, W, Van Marwijk Kooy, M, Boersma, W, Van Leendert, R, Kroon, C, Dullemond Westland, A, Viergever, P, Kuipers, A, Grootenboers, M, Creemers, J, Pieters, W, De Munck, D, Timmer, H, Jackson, S, Sandset, P, Meyer, P, Kristiansen, T, Portugal, J, Paz, E, Salazar, D, Chavez, W, Castillo, L, De Guia, T, Lenora, F, Tomkowski, W, Kloczko, J, Rybak, Z, Gaciong, Z, Sobkowicz, B, Pruszczyk, P, Nizankowski, R, Mirek Bryniarska, E, Kukla, P, Reis, A, França, A, Cortez, M, Sa, J, Santos, F, Marques, Ma, Gordeev, I, Gendlin, G, Yablonsky, P, Sokurenko, G, Soroka, V, Lusov, V, Markov, V, Shvats, Y, Katerlnitskiy, I, Lapin, O, Lyamina, N, Subbotin, Y, Kim, I, Zilber, E, Kchaisheva, L, Poliacik, P, Macek, V, Pretorius, Jp, Abdullah, I, Basson, M, Bollinger, C, Breedt, J, Gani, M, Jansen, J, Le Roux, G, Nortje, H, Van Der Linder, M, Van Zyl, L, Viljoen, J, Bruning, A, Pujol Farriols, R, Raguer, E, Nuffal, D, Sanchez Rodriguez, A, Eriksson, H, Almgren, T, Carlsson, A, Elf, J, Olsson, Cg, Aagesen, J, Savas, I, Sahin, A, Erdogan, Y, Ozhan, M, Ongen, G, Celikel, T, Turker, H, Arseven, O, Tuncay, E, Ozacar, R, Gudz, I, Nykonenko, O, Skupyy, O, Kovalskyy, I, Prasol, V, Cohen, A, Rodriguez Cintron, W, Gurka, D, Bradley, J, Oliver, G, Spyropoulos, A, Lerner, R, Fulmer, J, Lu, Np, Wright, P, Han, D, Servi, R, Nadar, V, Quaranta, A, Gehring, J, Ginsberg, R, Jacobson, A, Colan, D, Vanway, C, Gurza, E, Braslow, B, Shorr, A, Rehm, J, Martin, J, Sellers, M, Concha, M, Gordon, I, Pullman, J, Moran, J, Welker, J, Panzarella, P, Mullins, M, Willms, D, Mcgrew, F, Turki, M, Menajovsky, L., Epidemiologie, MUMC+: KIO Kemta (9), RS: CAPHRI School for Public Health and Primary Care, Amsterdam Cardiovascular Sciences, Vascular Medicine, Department of Vascular Medicine (DVM - AMC), Academic Medical Center - Academisch Medisch Centrum [Amsterdam] (AMC), University of Amsterdam [Amsterdam] (UvA)-University of Amsterdam [Amsterdam] (UvA), SA Pathology at Flinders Medical Center (ASG), Flinders University, Department of Epidemiology (MHP), Maastricht University [Maastricht], College of Public Health (CPH), University of Oklahoma (OU), Centre d'Investigation Clinique (CIC - Brest), Université de Brest (UBO)-Institut National de la Santé et de la Recherche Médicale (INSERM), Groupe d'Etude de la Thrombose de Bretagne Occidentale (GETBO), Université de Brest (UBO)-Institut Brestois Santé Agro Matière (IBSAM), and Université de Brest (UBO)-Université de Brest (UBO)

Subjects
Male, MESH: Pulmonary Embolism, Oligosaccharides, MESH: Factor X, 030204 cardiovascular system & hematology, MESH: Intention to Treat Analysis, MESH: Aged, 80 and over, 0302 clinical medicine, MESH: Double-Blind Method, 030212 general & internal medicine, MESH: Warfarin, Aged, 80 and over, MESH: Aged, education.field_of_study, Idrabiotaparinux, MESH: Middle Aged, General Medicine, Heparin, Middle Aged, Intention to Treat Analysis, 3. Good health, Pulmonary embolism, Acute Disease, MESH: Acute Disease, Drug Therapy, Combination, Female, medicine.drug, Adult, medicine.medical_specialty, MESH: Enoxaparin, Adolescent, Population, Biotin, MESH: Anticoagulants, Double blind, 03 medical and health sciences, Double-Blind Method, Internal medicine, MESH: Biotin, medicine, Humans, Enoxaparin, education, Aged, MESH: Adolescent, MESH: Humans, Intention-to-treat analysis, business.industry, Warfarin, Anticoagulants, MESH: Adult, Odds ratio, medicine.disease, MESH: Male, Surgery, MESH: Drug Therapy, Combination, Factor X, Pulmonary Embolism, business, MESH: Female, MESH: Oligosaccharides, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract

International audience; BACKGROUND: Treatment of pulmonary embolism with low-molecular-weight heparin and vitamin K antagonists, such as warfarin, is not ideal. We aimed to assess non-inferiority of idrabiotaparinux, a reversible longlasting indirect inhibitor of activated factor X, to warfarin in patients with acute symptomatic pulmonary embolism. METHODS: In our randomised, double-blind, double-dummy, non-inferiority trial, we enrolled adults with objectively documented acute symptomatic pulmonary embolism attending 291 centres in 37 countries. We excluded patients who were pregnant, had active bleeding, kidney failure, or malignant hypertension, or were at high risk of death, bleeding, or adverse reactions to study drugs. We randomly allocated patients to receive 5-10 days' enoxaparin 1*0 mg/kg twice daily followed by subcutaneous idrabiotaparinux (starting dose 3*0 mg) or adjusted-dose warfarin (target international normalised ratio 2*0-3*0); regimens lasted 3 months or 6 months dependent on clinical presentation. Block randomisation was done with a central interactive computerised system, stratified by study centre and intended treatment duration. The primary efficacy outcome was recurrent venous thromboembolism at 99 days after randomisation. We estimated the odds ratio and 95% CI with a Mantel-Haenzsel χ(2) analysis (non-inferiority margin 2*0) in the intention-to-treat population. The main safety outcome was clinically relevant bleeding (major or non-major) in all patients at day 99. This study is registered with ClinicalTrials.gov, number NCT00345618. FINDINGS: Between Aug 1, 2006, and Jan 31, 2010, we enrolled 3202 patients aged 18-96 years. 34 (2%) of 1599 patients randomly allocated to receive enoxaparin-idrabiotaparinux and 43 (3%) of 1603 patients randomly allocated to receive enoxaparin-warfarin had recurrent venous thromboembolism (odds ratio 0*79, 95% CI 0*50-1*25; p(non-inferiority)=0*0001). 72 (5%) of 1599 patients in the enoxaparin-idrabiotaparinux group and 106 (7%) of 1603 patients in the enoxaparin-warfarin group had clinically relevant bleeding (0*67, 0*49-0*91; p(superiority)=0*0098). We noted similar differences in outcomes in those patients treated to 6 months. INTERPRETATION: Idrabiotaparinux could provide an attractive alternative to warfarin for the long-term treatment of pulmonary embolism, and seems to be associated with reduced bleeding. FUNDING: Sanofi-Aventis (Paris, France).

Published
2012

26. Micromechanical modelling of the viscoplastic behavior of Earth mantle polycrystals. International Symposium on Plasticity

Author

Detrez, Fabrice, Castelnau, O., Bollinger, C., Cordier, P., Raterron, P., Merkel, S., Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL), Elsevier, Detrez, Fabrice, Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Procédés et Ingénierie en Mécanique et Matériaux [Paris] (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut National de la Recherche Agronomique (INRA)

Subjects
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [SDE.MCG] Environmental Sciences/Global Changes, [PHYS.MECA.MEMA] Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [PHYS.PHYS.PHYS-GEO-PH] Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [SDE.MCG]Environmental Sciences/Global Changes, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], [SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], [SPI.MECA.MEMA] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]
Published
2012

27. The juxtaposition of eclogite and mid-crustal rocks in the Orlica-Snieznik Dome, Bohemian Massif

Author

Štipska, P., Chopin, F., Skrzypek, E., Schulmann, K., Pitra, Pavel, Lexa, O., Martelat, J.-E., Bollinger, C., Zackova, E., Dynamique de la lithosphère et des bassins sédimentaires (IPGS) (IPGS-Dylbas), Institut de physique du globe de Strasbourg (IPGS), Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Terre, Temps, Traçage, Géosciences Rennes (GR), Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), Institute of Petrology and Structural geology, Charles University [Prague] (CU), Czech Geological Survey [Praha], Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement [Lyon] (LGL-TPE), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École normale supérieure - Lyon (ENS Lyon), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Bohemian Massif, pseudosection modelling, eclogite, exhumation, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, crustal-scale folding, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2012

28. Micromechanical modeling of the viscoplastic behavior of multiphase Earth mantle polycrystals

Author

Castelnau, O., Detrez, Fabrice, Bollinger, C., Cordier, P., Hilairet, N., Merkel, S., Raterron, P., Procédés et Ingénierie en Mécanique et Matériaux [Paris] (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Centre National de la Recherche Scientifique (CNRS), Unité Matériaux et Transformations - UMR 8207 (UMET), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut National de la Recherche Agronomique (INRA), American Geophysical Union, Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Detrez, Fabrice, Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), and Institut de Chimie du CNRS (INC)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)

Subjects
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [SDE.MCG] Environmental Sciences/Global Changes, [PHYS.MECA.MEMA] Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [PHYS.PHYS.PHYS-GEO-PH] Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [SDE.MCG]Environmental Sciences/Global Changes, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], [SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], [SPI.MECA.MEMA] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]
Published
2011

29. REEs in authigenic carbonates: A new proxy for tracing fluid sources at cold seeps

Author

Rongemaille, E., Bayon, Germain, Pierre, Catherine, Mecozzi, S., Bollinger, C., Etoubleau, Joël, Voisset, M., Fouquet, Y., Géosciences Marines (GM), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Paléoclimats, proxies, processus (PALEOPROXUS), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Unité Matériaux et Transformations - UMR 8207 (UMET), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Unité de recherche Géosciences Marines (Ifremer) (GM), Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut National de la Recherche Agronomique (INRA), Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), and Institut de Chimie du CNRS (INC)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)

Subjects
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; Not Available

Published
2009

33. U series desequilibria in volcanic rocks from the Futuna spreading center (North Fiji Basin)

Author

Le Faouder, A., Hémond, Christophe, Benoit, M., Lagabrielle, Y., Guivel, C., Pelletier, B., Bollinger, C., Domaines Océaniques (LDO), and Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry
Published
2005

34. U-series disequilibria in volcanic rocks from the Futuna spreading center (North Fiji Basin)

Author

Faouder A., Le, Hémond, Christophe, Benoit, M., Lagabrielle, Y., Guivel, C., Pelletier, B., Bollinger, C., Laboratoire de Planétologie et Géodynamique [UMR 6112] (LPG), Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), and Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Published
2005

37. Chemical systematics of an intermediate spreading ridge: The Pacific-Antarctic Ridge between 56 degrees S and 66 degrees S

Author

Vlastelic, Ivan, Dosso, Laure, Bougault, Henri, Daniel Aslanian, Louis Géli, Etoubleau, Joel, Bohn, Marcel, JORON JL, and Bollinger, C.

Abstract

Axial bathymetry, major/trace elements, and isotopes suggest:that the Pacific-Antarctic Ridge (PAR) between 56 degrees S and 66 degrees S is devoid of any hotspot influence. PAR (56-66 degrees 5) samples have in-average lower Sr-87/Sr-86 and Nd-143/Nd-144 and higher Pb-206/(204)pb than northern Pacific midocean ridge basalts (MORB), and also than MORE from the other oceans. The high variability of Pb isotopic ratios (compared to Sr and Nd) can be due to either a;general high mu (HIMU) (high U/Pb) affinity of the southern Pacific upper mantle or to a mantle event first recorded in time by Pb isotopes. Compiling the results of this study with those from the PAR between 53 degrees S and 57 degrees S gives a continuous view of mantle characteristics from south Pitman Fracture Zone (FZ) to Vacquier FZ, representing about 3000 km of spreading axis. The latitude of Udintsev FZ (56 degrees S) is a limit between, to the north, a domain with large geochemical Variations and, to the south, one with small Variations. The spreading rate has intermediate values (54 mm/yr at 66 degrees S to 74 mm/yr at 56 degrees S) which increase along the PAR, while the axial morphology: changes from valley to dome. The morphological transition is not recorded by the chemical properties of the ridge basalts nor by the inferred mantle temperature which displays few variations (30-40 degrees C) along the PAR. Contrary to what is observed along the South-East Indian Ridge, PAR morphology appears to be controlled more by spreading rate rather than by mantle temperature. Much of the major and trace element variability results from segmentation control on the shallowest thermal structure of the mantle. The cold edge of a fracture zone seems to be more efficient when occurring in an axial dome context.:It is expressed as an increase of the magnitude of the Transform Fault Effect along the valley-dome transition, resulting in a clear increase of trace element ratio variability (such as Nb/Zr). There is no strong evidence for the previously proposed southwestward asthenospheric flow in the area. However, this flow model could explain the intrasegment asymmetric patterns.

Published
2000

38. Hot spot activity and tectonic settings near Amsterdam-St. Paul plateau (Indian Ocean)

Author

Janin, M., Hemond, C., Guillou, H., Maia, M., Johnson, K. T. M., Bollinger, C., Liorzou, C., Mudholkar, A., Janin, M., Hemond, C., Guillou, H., Maia, M., Johnson, K. T. M., Bollinger, C., Liorzou, C., and Mudholkar, A.

Abstract

The Amsterdam-St. Paul (ASP) plateau is located in the central part of the Indian Ocean and results from the interaction between the ASP hot spot and the Southeast Indian Ridge (SEIR). It is located near the diffuse boundary between the Capricorn and Australian plates. The seamount chain of the Dead Poets (CDP) is northeast of the ASP plateau and may represent older volcanism related to the ASP hot spot; this chain consists of two groups of seamounts: (1) large flat-topped seamounts formed 8-10 Ma and (2) smaller conical seamounts formed during the last 2 Myr. The ASP hot spot has produced two pulses of magmatism that have been ponded under the ASP plateau and erupted along the divergent boundary between the Capricorn and Australian plates. The N65 degrees orientation of the CDP as well as the seamount's elongated shapes support an opening motion between the Capricorn and Australian plates along a suture oriented in the N155 degrees direction. This motion compared to the Antarctic plate amounts to an apparent velocity of 7.7 cm/yr northeastward for the Capricorn-Australian block. This motion does not fit with a fixed plume model. We suggest, therefore, that the ASP plume experienced a motion of about 1-2 cm/yr to the SW, which is opposite to the asthenospheric flow in this region and suggests a deep-seated plume.

Published
2011
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39. Evidence for intense REE scavenging at cold seeps from the Niger Delta margin

Author

Bayon, Germain, Birot, Dominique, Ruffine, Livio, Caprais, Jean-claude, Ponzevera, Emmanuel, Bollinger, C., Donval, Jean-pierre, Charlou, Jean-luc, Voisset, Michel, Grimaud, S., Bayon, Germain, Birot, Dominique, Ruffine, Livio, Caprais, Jean-claude, Ponzevera, Emmanuel, Bollinger, C., Donval, Jean-pierre, Charlou, Jean-luc, Voisset, Michel, and Grimaud, S.

Abstract

For many trace elements, continental margins are the location of intense exchange processes between sediment and seawater, which control their distribution in the water column, but have yet to be fully understood. In this study, we have investigated the impact of fluid seepage at cold seeps on the marine cycle of neodymium. We determined dissolved and total dissolvable (TD) concentrations for REE and well-established tracers of fluid seepage (CH4, TDFe, TDMn), and Nd isotopic compositions in seawater samples collected above cold seeps and a reference site (i.e. away from any fluid venting area) from the Niger Delta margin. We also analyzed cold seep authigenic phases and various core-top sediment fractions (pore water, detrital component, easily leachable phases, uncleaned foraminifera) recovered near the hydrocast stations. Methane, TDFe and TDMn concentrations clearly indicate active fluid venting at the studied seeps, with plumes rising up to about 100 m above the seafloor. Depth profiles show pronounced REE enrichments in the non-filtered samples (TD concentrations) within plumes, whereas filtered samples (dissolved concentrations) exhibit slight REE depletion in plumes relative to the overlying water column and display typical seawater REE patterns. These results suggest that the net flux of REE emitted into seawater at cold seeps is controlled by the presence of particulate phases, most probably Fe-Mn oxyhydroxides associated to resuspended sediments. At the reference site, however, our data reveal significant enrichment for dissolved REE in bottom waters, that clearly relates to diffusive benthic fluxes from surface sediments. Neodymium isotopic ratios measured in the water column range from epsilon(Nd) similar to-15.7 to -10.4. Evidence that the epsilon(Nd) values for Antarctic Intermediate waters (AAIW) differed from those reported for the same water mass at open ocean settings shows that sediment/water interactions take place in the Gulf of Guinea. At each

Published
2011
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