|
|
|
|
|
| Vlastelic, Ivan; Dosso, Laure; Bougault, Henri; Aslanian, Daniel; Geli, Louis; Etoubleau, Joel; Bohn, Marcel; Joron, Jl; Bollinger, C. |
| 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... |
| Tipo: Text |
|
| Ano: 2000 |
URL: https://archimer.ifremer.fr/doc/00000/10578/9396.pdf |
| |
|
|
| Géli, Louis; Turon, J.-l.; Aslanian, Daniel; Balut, Y.; Beuzart, Paul; Cochran, J.; Francheteau, J.; Harmegnies, Francois; Landuré, Jean-yves; Le Suavé, Raymond; Mazaud, A.; Michel, E.; Normand, Alain; Pichon, Jack; Vlastelic, Ivan. |
| Tipo: Text |
|
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00288/39943/38491.pdf |
| |
|
|
| Vlastelic, Ivan. |
| The Pacific-Antarctic Ridge (PAR) between 56 and 66°S is far removed from any hotspot influence. The small geochemical variations observed along the ridge can be interpreted as being the result of cold edge effect caused by fracture zones. This effect seems to increase during the morphological transition from valley to dome, leading to an increase of trace element variability. The ridge morphological transition is not controlled by the mantle temperature. |
| Tipo: Text |
|
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00034/14506/11846.pdf |
| |
|
|
|
