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The objective of this study was to trace the time evolution of metal contaminants in sediments and its correlation with the industrial history of the area.
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The incremental additions of the daughter type can then be viewed in proportion to the abundance of parent atoms. It has already been shown— In practice, the isochron approach has many inherent advantages.
When a single body of liquid rock crystallizes, parent and daughter elements may separate so that, once solid, the isotopic data would define a series of points in time that can be plotted along a horizontal line reflecting a common value for the initial daughter isotope ratio (.
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Many radioactive dating methods are based on minute additions of daughter products to a rock or mineral in which a considerable amount of daughter-type isotopes already exists.
This contamination can be traced by analyzing sediments, which are the ultimate sink of pollutants that are derived from anthropogenic activities.
The Pb dating method is the principal technique for characterizing sediments on a time scale spanning over the last 100-150 years.
Rubidium-strontium (Rb-Sr) dating was the first technique in which the whole-rock isochron method was extensively employed.