Stable isotopes are alternative forms of elements with different molecular weights that are found naturally and do not decay radioactively. Stable isotope analysis of elements such as carbon, nitrogen ...

Potential causes for change in the boron isotope composition of the oceans with time are the variations of the relative proportions of each output and long-term changes of the weathering-derived input ...

Using radioactive isotope systems to determine the age and origins of minerals and rocks, primarily as tracers of magmatic processes and the evolution of the earth. Organic molecules in natural waters ...