PACANTARCTIC

Type Oceanographic cruise
Ship L'Atalante
Ship owner Ifremer
Dates 05/01/1996 - 19/02/1996
Chief scientist(s) GELI Louis ORCID

GEO-OCEAN - UMR 6538

Univ. Brest, CNRS, Ifremer, Univ. Bretagne Sud

Place Nicolas Copernic

29280 Plouzané

https://www.geo-ocean.fr/
DOI 10.17600/96010020
Objective

Geophysical and geochemical study of the Pacific-Antarctic ridge between S65/W175 and S60/W150. The first objective was to contribute to the understanding and modelling of the mechanisms of ocean ridge functioning on the scale of the basic accretion unit (< 100 km). The second was to study the zoning of the upper mantle on various scales, through investigating the geochemical signature of rocks from the axial valley. This cruise falls under the framework of the Inter-Ridge programme and is the result of cooperation between IFREMER/DRO/GM, INSU (CNRS,IPG, GRGS), Washington State University, Scripps (University of California) and the University of Chiba (Japan).

Data managed by SISMER

Sampling operations

Bibliography

Publications

Labidi J., Cartigny P., Hamelin C., Moreira M., Dosso Laure (2014). Sulfur isotope budget (32S, 33S, 34S and 36S) in Pacific-Antarctic ridge basalts: A record of mantle source heterogeneity and hydrothermal sulfide assimilation. Geochimica Et Cosmochimica Acta, 133, 47-67. Publisher's official version : https://doi.org/10.1016/j.gca.2014.02.023 , Open Access version : https://archimer.ifremer.fr/doc/00179/29013/


Croon Marcel B., Cande Steven C., Stock Joann M. (2010). Abyssal hill deflections at Pacific-Antarctic ridge-transform intersections. Geochemistry Geophysics Geosystems, 11(11), Q11004. https://doi.org/10.1029/2010GC003236


Hamelin Cedric, Dosso Laure, Hanan Barry, Barrat Jean-Alix, Ondreas Helene (2010). Sr‐Nd‐Hf isotopes along the Pacific Antarctic Ridge from 41 to 53°S. Geophysical Research Letters, 37(L10303), 1-5. Publisher's official version : https://doi.org/10.1029/2010GL042979 , Open Access version : https://archimer.ifremer.fr/doc/00004/11526/


Briais Anne, Ondreas Helene, Klingelhoefer FraukeORCID, Dosso Laure, Hamelin Cedric, Guillou Herve (2009). Origin of volcanism on the flanks of the Pacific-Antarctic ridge between 41°30'S and 52°S. Geochemistry Geophysics Geosystems, 10(9), 1-20. Publisher's official version : https://doi.org/10.1029/2008GC002350 , Open Access version : https://archimer.ifremer.fr/doc/00000/11106/


Vlastelic Ivan, Dosso Laure (2005). Initiation of a plume-ridge interaction in the South Pacific recorded by high-precision Pb isotopes along Hollister Ridge. Geochemistry Geophysics Geosystems, 6(5), Q05011. https://doi.org/10.1029/2004GC000902


Briais A, Aslanian DanielORCID, Geli LouisORCID, Ondreas Helene (2002). Analysis of propagators along the Pacific-Antarctic Ridge: evidence for triggering by kinematic changes. Earth And Planetary Science Letters, 199(3-4), 415-428. https://doi.org/10.1016/S0012-821X(02)00567-8


Ondreas Helene, Aslanian DanielORCID, Geli LouisORCID, Olivet Jean-Louis, Briais Anne (2001). Variations in axial morphology, segmentation, and seafloor roughness along the Pacific-Antarctic Ridge between 56 degrees S and 66 degrees S. Journal of Geophysical Research - section B - Solid earth, 106(B5), 8521-8546. Publisher's official version : https://doi.org/10.1029/2000JB900394 , Open Access version : https://archimer.ifremer.fr/doc/00000/438/


Vlastélic Ivan, Dosso Laure, Bougault Henri, Aslanian Daniel, Géli Louis, Etoubleau Joël, Bohn Marcel, Joron Jean-Louis, Bollinger Claire (2000). Chemical systematics of an intermediate spreading ridge: The Pacific-Antarctic Ridge between 56°S and 66°S. Journal of Geophysical Research: Solid Earth, 105(B2), 2915-2936. https://doi.org/10.1029/1999JB900234

Vlastelic Ivan, Aslanian DanielORCID, Dosso Laure, Bougault Henri, Olivet Jean-Louis, Geli LouisORCID (1999). Large-scale chemical and thermal division of the Pacific mantle. Nature, 399(6734), 345-350. https://doi.org/10.1038/20664


Geli LouisORCID, Aslanian DanielORCID, Olivet Jean-Louis, Vlastelic Ivan, Dosso Laure, Guillou H, Bougault Henri (1998). Location of Louisville hotspot and origin of Hollister ridge: geophysical constraints. Earth And Planetary Science Letters, 164(1-2), 31-40. https://doi.org/10.1016/S0012-821X(98)00217-9


Vlastelic Ivan, Dosso Laure, Guillou H, Bougault Henri, Geli LouisORCID, Etoubleau Joel, Joron Jl (1998). Geochemistry of the Hollister Ridge: relation with the Louisville hotspot and the Pacific-Antarctic Ridge. Earth And Planetary Science Letters, 160(3-4), 777-793. https://doi.org/10.1016/S0012-821X(98)00127-7


Aslanian Daniel, Geli Louis, Olivet Jean-Louis (1998). Hotspotting called into question. Nature, 396(6707), 127-127. Publisher's official version : https://doi.org/10.1038/24070 , Open Access version : https://archimer.ifremer.fr/doc/00000/450/

Geli LouisORCID, Bougault Henri, Aslanian DanielORCID, Briais Anne, Dosso Laure, Etoubleau Joel, Leformal Jp, Maia Marcia, Ondreas Helene, Olivet Jean-Louis, Richardson C, Sayanagi K, Seama N, Shah A, Vlastelic Ivan, Yamamoto M (1997). Evolution of the Pacific-Antarctic Ridge south of the Udintsev fracture zone. Science, 278(5341), 1281-1284. https://doi.org/10.1126/science.278.5341.1281


References of International Seminar Communications

L. Géli, A. Briais, S. Rouzo, D. Aslanian, H. Ondréas: Rift propagation driven by changes in plate motions: a model for the Pacific-Antarctic Ridge propagating rift near 167W, Royal Society of London, 1998.

L. Géli, D. Aslanian & J.-L. Olivet: Origin of the South Pacific Hollister Ridge and Location of the Louisville Hotspot: Kinematic Constraints and Implications for Recent Pacific Plate Motions., Eos, Transactions, American Geophysical Union. 73, 43, supplement, Pages 870, 1998

Vlastelic, I., Aslanian, D., Dosso, L., Bougault, H., Olivet, J.L., Resolving a large scale isotopic and bathymetric boundary within the Pacific ocean near 25°S, AGU fall meeting, , 1998.

Vlastelic, I., L. Dosso, H. Bougault, L. Géli, J. Etoubleau, and J.-L. Joron, Relation entre géochimie et segmentation: la dorsale Pacifique-Antarctique entre 56°S et 65°S, in 17ème Réunion des Sciences de la Terre, pp. 207, Brest, 31 mars/ 3avril 1998, 1998.Vlastelic, I., L. Dosso, J. Etoubleau, H. Bougault, L. Géli, and J.-L. Joron, Geochemical data from Hollister Ridge: a new mantle source in the south Pacific, AGU fall meeting,EOS, 78, 46, 675, 1997a.

A. Briais, H. Ondréas, D. Aslanian, L. Géli and ths Pacantarctic Scientific Party, Propagators and kinematics of the Pacific-Antarctic Ridge: Results from PACANTARCTIC cruise, European Union of Geoscience 9, Suppl. 1, Pages 516., 1997

D. Aslanian, A. Briais, H. Ondréas, L. Géli & J.-L. Olivet, Recent kinematic changes deduced from the shape of wrapping fracture zones surveyed on the Pacific-Antarctic Ridge, European Union of Geoscience 9, Suppl. 1, Pages 515., 1997

H. Ondréas, D. Aslanian, A. Briais L. Géli and the PACANTRACTIC cruise : Study of the axial morphology of the Pacific-Antarctic Ridge from the Erebus Fracture Zone to the Udintsev Fracture Zone, European Union of Geoscience 9, Suppl. 1, Pages 518., 1997

J.L. Olivet, H. Bougault, L. Géli, D. Aslanian and the PACANTRACTIC cruise (A. Briais, L. Dosso, J. Etoubleau, J.-P. Le-Formal, M. Maia, H. Ondréas, C. Richardson, K. Sayanagi, N. Seama, A. Shah, I. Vlastelic, M. Yamamoto) : The Hollister Ridge: Results from the Pacantarctic cruise, European Union of Geoscience 9, Suppl. 1, Pages 518., 1997

L. Géli H. Bougault and the PACANTRACTIC cruise (D. Aslanian, A. Briais, L. Dosso, J. Etoubleau, J.-P. Le-Formal, M. Maia, H. Ondréas, J.-L. Olivet, C. Richardson, K. Sayanagi, N. Seama, A. Shah, I. Vlastelic, M. Yamamoto) : The Pacific-Antarctic Ridge south of Udintsev Fracture Zone: Results form teh Pacantarctic cruise, European Union of Geoscience 9, Suppl. 1, Pages 514., 1997

L. Géli, D. Aslanian, J.-L. Olivet, H. Bougault, I. Vlastelic, L. Dosso & H. Guillou, The Hollister Ridge, the Louisville Hotspot and the "hot-spotting technique", reply to Wessel and Kroenke., Eos, Transactions, American Geophysical Union. 78, 46, Suppl., Pages 675. 1997

Vlastelic, I., L. Dosso, J. Etoubleau, J.-L. Joron, H. Bougault, and L. Géli, New geochemical data from the Pacific-Antarctic Ridge and the Hollister Ridge, EUG, Strasbourg,Terra Nova, 9, 515, 1997b.

A. Briais, D. Aslanian, H. Ondréas & L. Géli , The 167 degrees W propagator along the Pacific-Antarctic Ridge, results from the Pacantarctic cruise., Eos, Transactions, American Geophysical Union. 77, 46, Suppl., Pages 729. 1996.

D. Aslanian, H. Ondréas, L. Géli & A. Briais, Axial morphology of the Pacific-Antarctic Ridge from the Pacantarctic cruise of the N/ O L'Atalante., Eos, Transactions, American Geophysical Union. 77, 46, Suppl., Pages 729. 1996.

L. Géli, H. Ondréas, J.-L. Olivet, M. Sahabi, D. Aslanian & L. Gilg-Capar, Thermal structure vs, spreading rate at intermediate spreading rates, the example of the Pacific-Antarctic Ridge between 55and 53., Eos, Transactions, American Geophysical Union. 75, 16, Suppl., Pages 330. 1994.

Ondréas, H., Géli, L., Olivet J.L., and Sahabi, M., 1994. Along-axis gravimetry signature of the Pacific-Antarctic Ridge from Udintsev fracture zone to 63°S-156°W. International workshop on seafloor mapping in the West and Southwest Pacific, LIFOU-NOUMEA, 4-9 novembre 1994.

References of National Seminar Communications

D. Aslanian, L. Géli & J.-L. Olivet : Louisville, Hollister et la méthode du "hotspotting", Réunion Annuelle des Sciences de la Terre., Page. 65, 1998

H. Ondréas, D. Aslanian, A. Briais & L. Géli : Variations de morphologie axiale de la dorsale Pacifique-Antarctique, Réunion Annuelle des Sciences de la Terre., Page. 168, 1998

L. Géli, D. Aslanian, H. Ondréas, A. Briais & S. Rouzo : Etude comparative des dorsales Pacifique-Antarctique et Sud-Est Indienne, Réunion Annuelle des Sciences de la Terre., Page. 119, 1998

Vlastelic, I., L. Dosso, H. Bougault, L. Géli, J. Etoubleau, and J.-L. Joron, Relation entre géochimie et segmentation: la dorsale Pacifique-Antarctique entre 56°S et 65°S, in 17ème Réunion des Sciences de la Terre, pp. 207, Brest, 31 mars/ 3avril 1998.

DEA or MASTER 2 using campaign data

Vila, Douglas, "Étude des anomalies de gravité réduites au manteau le long de la dorsale Pacifique-Antarctique", DEA au labp. de la DRO-GM, Ifremer, présenté à l'UBO en juin 1997.

Thesis using campaign data

Géli, L., "Contribution à l'étude des dorsales médio-océaniques à grande échelle : étude de la dorsale Pacifique-Antarctique et comparaison avec la dorsale Sud-Est indienne", laboratoire de DRO/GM , Mémoire d'habilitation à Diriger des Recherches, Université de Bretagne Occidentale, Avril 1998.

Vlastelic, Ivan, "Hétérogénéité et fusion partielle du manteau. Une étude de la dorsale Pacifique-Antarctique et de la ride d'Hollister (Pacifique Sud)", Thèse de géochimie, laboratoire de DRO/GM, Ifremer, Mention très honorable avec félicitations du jury, 20 Novembre 1998