چكيده لاتين :
Copper, Pb, Zn, Ni, Co, Mn, AI, Ca, magnetic susceptibility and loss on ignition of sediments from two cores near
Mangalore along the western continental shelf of India have been studied. The sediments have high Al and organic
matter contents due to the high sedimentation rate and their proximity to river mouths. Down-core variations of
elements indicate a decrease of lithogenous component during probably the past few centuries. While abundance of
calcareous shells in some zones has lead to the dilution of most of the metals, it appears that Pb and Mn are associated
with this phase. Copper, Zn and Fe are associated with organic matter and detrital particles, whereas Ni and Co are
predominantly associated with the insoluble fraction. Oxides/hydroxides of Fe and Mn are absent because of the
reducing conditions and the high terrigenous influx. Geochernically, Mn and Fe are present in different phases of
sediments (in the insoluble fraction and organic matter respectively). The Fe content of one of the cores is positively
correlated with magnetic susceptibility.
