CURRICULUM VITAE
Jérôme
Dyment
Born on july 12th, 1963 in Lille, France
French citizen
Married, 2 children
Position: Chargé de recherche (permanent position)
at Centre National de la Recherche Scientifique (CNRS)
Address: CNRS UMR 6538,
Institut Universitaire Européen
de la Mer,
Université de Bretagne
Occidentale, Technopôle Brest-Iroise,
1 place Copernic, 29280 Plouzané, France.
Tel. (33) 298 49
87 20
Fax (33) 298 49
87 60
e-mail jerome@univ-brest.fr
1) Studies and diplomas
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Baccalauréat in mathematics and physics. Lille, june 1981.
September 1981-June 1983: General maths, physics, and chemistry studies
at Université
des Sciences et des Techniques, Lille, France
-
DEUG A (Diplome d'Etudes Universitaires Generales), june 1983.
September 1983-June 1985: General geophysics studies
at Institut de Physique du
Globe, Université
Louis Pasteur, Strasbourg, France
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Licence in geophysics, june 1984.
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Maîtrise in geophysics, june 1985.
September 1985-February 1991: Marine geophysics studies
at Institut de Physique du
Globe, Université
Louis Pasteur, Strasbourg, France
2) Research
Two main subjects:
-
deep seismic reflection methods and sedimentary basins in continental
domain
(Diplôme
d'Ingénieur and other related works; 1986-1989)
-
marine magnetic data analysis and the structure of the oceanic lithosphere
(Doctorat,
Post-Docs and later works; 1988-now)
16 publications reviewed by at least 2 independent referees (10 as first
author), 12 other publications (3 as first author), 71 communications presented
at international and national meetings (33 as first author), and 4 memoirs
(see list
of publications).
a) Seismic methods and sedimentary
basins in continental domain
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Data: deep seismic reflection profiles,
gravity, wells, subsurface geology... in the Celtic Sea area.
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Methods: seismic interpretation, gravity
modeling, subsidence analysis, complementary processing.
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Observations: deep Mesozoic basins, transparent
upper crust, dipping Paleozoic thrusts, reflective lower crust, flat Moho,
transparent upper mantle.
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Main results:
-
both pure and simple shear models for basin formation disagree with
the observations in the Celtic Sea area
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the Paleozoic thrusts were not reactivated as detachment faults, as
previously suggested
-
the preferred model involve pure shear and late restoration of the initial
Moho geometry
-
the lower crustal high reflectivity is younger than the basin formation
(at Institut Français du Petrole,
IFREMER, and Institut
de Physique du Globe de Strasbourg)
b) Magnetic anomalies and oceanic
lithosphere
2 approaches:
-
age, structure, evolution of the oceanic lithosphere, plate kinematics;
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magnetic structure of the oceanic lithosphere, source of the anomalies.
b-1) Structure, age and evolution
of the northwestern Indian Ocean
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Data: magnetics, and eventually bathymetry,
altimetry, seismic... in the northwestern Indian Ocean.
-
Methods: magnetic anomaly identifications,
kinematic reconstructions.
-
Main results: they are related to
compression of the oceanic lithosphere, ridge-hotspot interactions, and
ridge propagation
-
kinematics of India/Australia/Africa imply a diffuse plate boundary
in the Central Indian Basin since 10 Ma, in agreement with direct observations
in this basin;
-
a compressive episode occurred at 65 Ma in the Northern Mascarene Basin,
triggering immature subduction in the Amirantes Arc and possible diffuse
compression in the basin;
-
the Central Indian Ridge remained above the Deccan/Reunion hotspot between
60 and 45 Ma, leading to the creation of conjugate structures on both Indian
and African plates;
-
a propagator-like RFF triple junction existed in the Central Indian
Ocean between 65 and 49 Ma, creating numerous fracture zones on the Southwest
Indian Ridge;
-
the Carlsberg Ridge in marked, between 52 and 48 Ma, by a tremendous
spreading asymmetry accommodated by a number of propagators, possibly as
a response to the presence of the nearby Deccan-Reunion hotspot.
(mainly at Institut de Physique
du Globe de Strasbourg, Lamont-Doherty
Geological Observatory and
Université de Bretagne
Occidentale, Brest)
b-2) Magnetic structure and
properties of the oceanic lithosphere
-
variations of axial magnetic anomaly amplitude along the Central Indian
Ridge axis, relations with the axial valley depth and the seismicity
-
processes of accretion, tectono-magmatic cycles.
(at Institut de Physique du Globe
de Strasbourg)
-
intermediate wavelength magnetic anomalies in the Indian Ocean
-
strong anomalies associated to the oceanic plateaus and the Indonesian
subduction zone (induced/viscous magnetization of their peculiar lithospheric
structures);
-
weaker anomalies in the basins, parallel to the sea floor spreading
isochrons (remanent magnetization of the whole crust and perhaps the uppermost
mantle) or parallel to the spreading direction on both side of Amsterdam
hotspot and at the Australian-Antarctic Discordance (variation of magnetic
petrology between major oceanic domains).
(at Institut de Physique du Globe
de Strasbourg)
-
satellite magnetic anomalies
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Forward modeling of anomalies caused by the global distribution of remanent
magnetization within the oceans; effect of the Cretaceous Quiet Zones and
of young areas
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Inversion of the satellite anomalies to obtain magnetic susceptibility
at a global scale, methodology and geological interpretations
(at McGill University, Montreal)
-
skewness of the Vine-Matthews magnetic anomalies in the Indian Ocean
-
comparison of three methods of skewness determination; northward motion
of the ridges bounding the Indian plate; evidence of anomalous skewness
in the Indian Ocean basins, relation with spreading rate and association
with fossil spreading centers.
(at Lamont-Doherty Geological
Observatory)
-
modeling the remanent magnetization of the oceanic lithosphere
-
the anomalous skewness of marine magnetic anomalies may only be explained
by a spreading rate dependent magnetization of the oceanic lithosphere
-
the "hook shape" of marine magnetic anomalies is correctly modeled by
a magnetization distribution with deepest part acquired through serpentinization
of ultramafics
(at McGill University, Montreal)
-
amplitude of marine magnetic anomalies
-
variations over the South Pandora Ridge, North Fiji Basin
-
variations in the North Atlantic
(at Université de Bretagne
Occidentale, Brest)
-
recent developments in marine magnetometry
-
deep tow and submersible magnetometry, implications on the structure
and magnetic properties of the oceanic crust
-
three component magnetometry
(current work at Université
de Bretagne Occidentale, Brest)
3) Field experience
Participation to 7 geophysical cruises:
-
R/V Marion-Dufresne cruise MD 57 / Geodyn, Chief Scientist: Ph.
Patriat
-
R/V Marion-Dufresne cruise MD 61 / Geophycir, Chief Scientist:
R. Schlich
-
R/V Marion-Dufresne cruise MD 67 / Kersimag, Chief Scientist:
R. Schlich
-
R/V Marion-Dufresne cruise MD 70 / Phedre, Chief Scientists: N.
Chamot-Rooke, B. de Voogt
-
R/V Nadir
cruise Tammar and Deep Sea Submersible Nautile, Chief Scientist: P. Gente
-
R/V
Marion-Dufresne II cruise VT 34 / Magofond I, Chief Scientist: Ph.
Patriat
-
R/V
Marion-Dufresne II cruise MD 112 / Magofond II, Chief Scientists: J.
Dyment, Y. Gallet
=> experience in
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acquisition of bathymetry, gravity, magnetics, single and multi-channel
seismic data
-
dives in deep sea submersible
-
acquisition of deep tow and three component magnetic anomalies
4) Visits in other laboratories
(cooperations, seminars)
in France:
Institut Francais de Recherche pour
l'Exploitation de la Mer, Brest (1987, J.C. Sibuet).
Institut Francais du Petrole, Rueil-Malmaison
(1987, 1988 B. Pinet, O. Gariel, C. Bois).
Institut de Physique du Globe,
Paris (1989, 1990, 1991, P. Patriat; 1996, 1997, 1998, Y. Gallet).
Ecole Normale Supérieure,
Paris (1991, P. Huchon)
Observatoire Oceanologique,
Villefranche sur Mer (Seminar, 1991)
Observatoire Midi-Pyrenees, Toulouse
(Seminar, 1998)
-
abroad:
Oxford University, UK (1989, N. Mitchell)
Institute for Oceanographic Sciences,
Wormley, UK (1989, L. Parson)
Lamont-Doherty Geological Observatory,
Palisades, USA (1988, 1992, S.C. Cande).
Scripps Institution of Oceanography,
La Jolla, USA (1993, S.C. Cande).
McGill University, Montréal,
Canada (1993-1994, J. Arkani-Hamed).
University of Texas at Austin,
USA (Seminar, 1994).
Ocean Research Institute, University
of Tokyo, Tokyo, Japan (1996 and 1998, K. Tamaki).
Geological Survey of Japan, Tsukuba,
Japan (1996, K. Sayanagi; 1998, T. Urabe).
Japan Marine Science and Technology
Center, Yokosuka, Japan (1996, K. Kobayashi).
Chiba University, Chiba,
Japan (1996 and 1998, N. Isezaki and N. Seama).
Seoul National University, Seoul,
Korea (1996, D. Choi, C.E. Baag)
National Institute of Oceanography,
Goa, India (1996, G.C. Bhattacharya)
Korean Ocean Research and Development
Institute, Ansan, Korea (1998, S.M. Lee)
5) Teaching / research supervision
In charge of the
semestrial practicals of
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"Introduction to seismic methods" (Licence)
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"Signal processing" (Maitrise)
-
"Seismic methods" (Maitrise)
Responsibility of individual
training periods for 4 students (DEA or Engineers).
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1993: co-responsibility of a Master student at McGill
University, Montreal, Canada
-
1994-now: participation to teaching and training at Université
de Bretagne Occidentale
In charge of Signal Processing
course (DEA) until 1997
Responsibility of individual
training periods for 6 students (Maîtrise, DEA, Doctorat)
-
Students presently working with me (at least in part) are:
6) Responsabilities
7) Affiliations
8) Distinctions