Hf and Pb isotopes Basalts erupted on volcanic seafloor range from 17.8 to 18.0 for 206 Pb/ 204 Pb, vol.15 ,
, Sr/ 86 Sr. Basalts erupted on ultramafic seafloor range from 17.7 to 17.9 for 206 Pb/ 204 Pb
, Sr/ 86 Sr. These compositions are similar to those reported by, p.for, 2005.
, Pb/ 204 Pb and 208 Pb/ 204 Pb at a given 206 Pb/ 204 Pb than their Atlantic and Pacific counterparts (Figure 3), which is coherent with the Indian Ocean MORB characteristics, 1983.
All isotopic ratios measured in the basalts from the 61° to 67°E region of the SWIR are in agreement with the trend defined between 61° and 67°E by, 2005. ,
87 Sr/ 86 Sr=0.703831; and at 67°E, 1971. ,
, Pb/ 204 Pb=17.78, 87 Sr/ 86 Sr=0.702970), and less radiogenic in Nd and Hf isotopes
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