FN Archimer Export Format
PT J
TI New structural and geochemical observations from the Pacific-Antarctic Ridge between 52°45'S and 41°15'S
BT 
AF KLINGELHOEFER, Frauke
   ONDREAS, Helene
   BRIAIS, A
   HAMELIN, C
   DOSSO, Laure
AS 1:1;2:1;3:2;4:3;5:4;
FF 1:PDG-DOP-DCB-GM-LGG;2:PDG-DOP-DCB-GM-LGM;3:;4:;5:;
C1 IFREMER, Dept Marine Geosci, F-29280 Plouzane, France.
   Observ Midi Pyrenees, CNRS, UMR 5562, F-31400 Toulouse, France.
   Univ Bretagne Occidentale, Inst Univ Europeen Mer, F-29280 Plouzane, France.
   CNRS, UMR 6538, F-29280 Plouzane, France.
C2 IFREMER, FRANCE
   OBSERV MIDI PYRENEES, FRANCE
   UBO, FRANCE
   CNRS, FRANCE
SI BREST
SE PDG-DOP-DCB-GM-LGG
   PDG-DOP-DCB-GM-LGM
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 2.602
TC 8
TU Centre national de la recherche scientifique
   Institut français de recherche pour l'exploitation de la mer
   Service Hydrographique et Océanographique de la Marine
   Université de Bretagne Occidentale
   Université de Bretagne-Sud
   Université de Toulouse III - Paul Sabatier
UR https://archimer.ifremer.fr/doc/2006/publication-2108.pdf
LA English
DT Article
CR PACANTARCTIC 2
BO L'Atalante
DE ;Mantle Bouguer anomaly;Temperature variations;Geochemistry;Gravity;Bathymetry;Ridge segment
AB We investigated the morphology and structure of the Pacific-Antarctic Ridge between 52 degrees 45'S and 41 degrees 15'S during the Pacantarctic2 cruise using multibeam echosounder together with gravity measurements and dredges. Analysis of the bathymetric, gravity and geochemical data reveal three ridge segments separated by overlapping spreading centers south of the Menard transform fault (MTF) and five segments north of it. Calculation of the cross-sectional area allows quantification of the variation in size of the axial bathymetric high. Together with the calculation of the mantle Bouguer anomaly, these data provide information about variations in the temperature of the underlying mantle or in crustal thickness. Areas with hotter mantle are found north and south of the MTF. Geochemical analyses of samples dredged during the survey show a correlation of high cross-sectional area values and negative mantle Bouguer anomalies in the middle of segments with relatively less depleted basalts.
PY 2006
PD NOV
SO Geophysical Research Letters ( GRL )
SN 0094-8276
PU American Geophysical Union
VL 33
IS 21
UT 000241982900003
BP 1
EP 19
DI 10.1029/2006GL027335
ID 2108
ER

EF