Sr isotopes

Sr isotopes refer to variations in the forms of the element strontium, which has different versions called isotopes—atoms with the same number of protons but different neutrons. The most common isotopes are Sr-86, Sr-87, and Sr-86. The ratio of Sr-87 to Sr-86 in a sample can provide information about its age and origin because these ratios change over time due to radioactive decay. By analyzing Sr isotopic ratios in rocks, minerals, or fossils, scientists can trace geological processes, migration patterns, and the history of Earth's materials.