Advances in Applications of Non-traditional Stable Strontium(δ~(88/86)Sr) Isotope in Geochemistry

Stable strontium isotope,one of the non-traditional stable isotopes,has been focused on in isotope geochemistry since last ten years and has become one of the exciting frontier sciences in geo-scientific studies.Strontium has four stable isotopes:84Sr,86Sr,87Sr and 88Sr.TIMS or MC-ICP-MS can be employed to measure stable strontium isotopes,and the ratios are expressed as δ88/86Sr.Variations in δ88/86Sr in nature range from-1.73‰ to 0.66‰.The factors affecting strontium fractionation are indistinct,and more work needs to be done on the fractionation mechanism for further understanding.At present the applications of stable strontium isotope geochemistry are presented as follows:(1) Paleoceanographic temperaure reconstruction based on δ88/86Sr of cold-water corals;(2) combining radiogenic strontium and stable strontium fractionation to study geochemical cycling in the ocean;(3) paleodietary research with stable strontium in bones.