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Jacques Bourgois
Université Pierre et Marie Curie - Paris 6
Institut des Sciences de la Terre Paris (iSTeP) - UMR 7193 UPMC-CNRS Case 124
Tour 46-00, 2 ème étage
4, place Jussieu
75252 Paris Cedex 5 - France
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Tel: 01 44 27 52 08
Email: jacques.bourgois@upmc.fr and bourgoisjacques@gmail.com
Tour 46-00, 2 ème étage
4, place Jussieu
75252 Paris Cedex 5 - France
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Tel: 01 44 27 52 08
Email: jacques.bourgois@upmc.fr and bourgoisjacques@gmail.com
Complete CV (in French) including list of publications available →→→→ next sections at this site
http://www.jacques-bourgois.org
AIM OF ACADEMIC WORK
Basically, I am geologist and geophysicist. I have worked extensively in Latin America from Baja California (Mexico) to Patagonia (Chile and Argentina) exploring processes related to Middle America and Andean subductions. I have worked both on land and at sea conducting field works from the foreland to the Pacific coastline and off shore campaigns, respectively. I was Chief Scientist of six cruises off Mexico, Peru and Chile including three deep-sea diving cruises using the submersible NAUTILE. We explored and sampled seafloor at the Peru-Chile and the Middle America trenches down to 6000-m. I was involved in the DSDP Leg 84 (Glomar Challenger) and ODP Leg 112 (Joides Resolution) drilling campaigns along the continental margins of Guatemala and Peru, respectively. It allowed us to better understand the tectonic regime and processes associated with the underthrust of the Pacific oceanic lithosphere beneath the Middle and South America continental basements.
MEETING THE ANTICIPATED EXPLOSION IN ELECTRICITY DEMAND
WASTE ELIMINATION FROM NUCLEAR FUEL
Along the ~60,000 km of deep oceanic trenches the subduction process participates in oceanic lithosphere recycling. In other words the basalt and associated sediment cover of the seafloor are moving downward together with trench sediment. They underthrust the continental margin of the upper plate towards the asthenosphere. Therefore the subduction process appears as a well for sub-surface material to be removed at depth greater than ~100-150 km. This natural well is potentially appropriate for nuclear fuel waste to be permanently eliminated.
However, slab rock melting is occurring beneath the volcanic arc at distances ranging from 100 to 250 km from the subduction front. Along fast subductions –i.e. such as the SW Pacific- it takes about 800,000 years for the subducted material to erupt at volcanic edifices of the volcanic arc. At slower subduction, the transit time for the subducted material is longer than one Million years.
Subductions such as the Peru and northern Chile exhibit no volcanic arc. At those sites no subducted material is removed to the atmosphere. This situation is stable along the 1500 km long Peru subduction zone since ~20 Million years. For these reasons, I proposed (Bourgois, 1996) the Peru subduction zone (see also Bourgois et al., 1988; von Huene et al., 1988; Dia et al., 1993, Bourgois et al., 1993; Aquilina et al., 1997; Bourgois et al., 2007) to be extensively surveyed in the perspective of having an accurate field understanding of its potentials for nuclear waste elimination.
Subductions such as the Peru and northern Chile exhibit no volcanic arc. At those sites no subducted material is removed to the atmosphere. This situation is stable along the 1500 km long Peru subduction zone since ~20 Million years. For these reasons, I proposed (Bourgois, 1996) the Peru subduction zone (see also Bourgois et al., 1988; von Huene et al., 1988; Dia et al., 1993, Bourgois et al., 1993; Aquilina et al., 1997; Bourgois et al., 2007) to be extensively surveyed in the perspective of having an accurate field understanding of its potentials for nuclear waste elimination.
Selected References
(56) Bourgois, J., Bigot-Cormier, F., Bourles, D., Braucher, R., Dauteuil, O., Witt, C., Michaud, F., 2007, Tectonic records of strain buildup and abrupt co-seismic stress release across the northwestern Peru coastal plain, and continental slope during the past 200 kyr. Journal of Geophysical Research, 112, B04104, doi:10.1029/2006JB004491.
(37) Aquilina, L., Dia, A.N., Boulègue, J., Bourgois, J., and Fouillac, A.M., 1997, Massive barite deposits along the convergent margin of Peru: implications for fluid circulation within subduction zones. Geochimica.Cosmochimica.Acta, 61, 1233-1245.
(28) Dia, A.N., Aquilina, L., Boulègue, J., Bourgois, J., E. Suess, and Torres, M., 1993, Origin of fluids and related-barite deposits at vent sites along the Peru convergent margin, Geology, 21, 1099-1102.
(27) Bourgois, J., Lagabrielle, Y., De Wever, P., Suess, E., and NAUTIPERC team, 1993, Tectonic History of the northern Peru convergent margin during the past 400 Ka, Geology, 21, 531-534.
(21) von Huene, R., Bourgois, J., Miller, J., and Pautot, G., 1989, A large Tsunamogenic landslide and debris along the Peru Trench, Journal of Geophysical Research, 94, 1703-1714.
(20) Bourgois, J., Pautot, G., Bandy, W., Boinet, T., Chotin, P., Huchon, P., Mercier de Lepinay, B., Monge, F., Monlaü, J., Pelletier, B., Sosson, M., and von Huene, R., 1988, Seabeam and seismic reflexion imaging of the tectonic regime of the Andean continental margin off Peru (4°S to 10°S), Earth and Planetary Science Letters, 87, 111-126.
OIL AND GAS
From 1980 to 1995, I have the opportunity to be funded by Petroleum and Mining companies including Elf Ecuador, Elf Colombia, Ecuatomin, and the BRGM. During my subsequent five-years stay (2001-2006) in Ecuador as Professor at the Escuela Politecnica Nacional (EPN-Quito), a close collaboration with Petroecuador and Perupetro allowed us to constrain the evolution of the Gulf of Guayaquil-Tumbes basin for the past 1.8-1.6 Million years. At less few ten of kilometers south of the Ecuador Peru border, major gas and oil reservoirs exist along the northern Peru forearc. Instead geologic and geophysical evidences suggest that these gas and oil reservoirs should extend along the Ecuadorian side, they are not identified yet. Our published works including Witt et al., (2006), Bourgois et al. (2007), Witt and Bourgois (2009) suggest that a new strategy should be designed in order to find what is the exact location of sites to be surveyed for successful discovery of major reservoirs along the Ecuadorian forearc.
Selected References
(64) Bourgois, J., 2013, A review on tectonic record of strain buildup and stress release across the Andean forearc along the Gulf of Guayaquil-Tumbes basin (GGTB) near Ecuador-Peru border, International Journal of Geosciences, 4, 618-635, doi:10.4236/ijg.2013.43057
(62) Bourgois, J., Bourles, D., and R. Braucher, 2011, Reply to Comment by K. Pedoja et al. on "Tectonic record of strain buildup and abrupt coseismic stress release across the northwestern Peru coastal plain, shelf, and continental slope during the past 200 kyr, Journal of Geophysical Research, 116, B09402, doi:10.1029/2011JB008582.
(58) Witt, C., Bourgois, J., 2010, Forearc basin formation in the tectonic wake of a collision driven, coastwise migrating crustal block: the example of the North Andean block and the extensional Gulf of Guayaquil-Tumbes basin (Ecuador-Peru border area). Geological Society of America Bulletin, 122, p. 89-108, doi:10.1130/B26386.1.
(56) Bourgois, J., Bigot-Cormier, F., Bourles, D., Braucher, R., Dauteuil, O., Witt, C., Michaud, F., 2007, Tectonic records of strain buildup and abrupt co-seismic stress release across the northwestern Peru coastal plain, and continental slope during the past 200 kyr. Journal of Geophysical Research, 112, B04104, doi:10.1029/2006JB004491.
(54) Witt, C., Bourgois, J., Michaud, F., Ordoñez, M., Jimenez, N., Sosson, M., 2006, Development of the Gulf of Guayaquil (Ecuador) during the Quaternary as an effect of the North Andean block tectonic escape. Tectonics, 25, TC3017, doi:10.1029/2004TC001723.
(56) Bourgois, J., Bigot-Cormier, F., Bourles, D., Braucher, R., Dauteuil, O., Witt, C., Michaud, F., 2007, Tectonic records of strain buildup and abrupt co-seismic stress release across the northwestern Peru coastal plain, and continental slope during the past 200 kyr. Journal of Geophysical Research, 112, B04104, doi:10.1029/2006JB004491.
(54) Witt, C., Bourgois, J., Michaud, F., Ordoñez, M., Jimenez, N., Sosson, M., 2006, Development of the Gulf of Guayaquil (Ecuador) during the Quaternary as an effect of the North Andean block tectonic escape. Tectonics, 25, TC3017, doi:10.1029/2004TC001723.
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