rubidium-strontium m dating铷锶计年
rubidium-strontium dating method铷一锶法
rubidium-strontium isotopic dating铷
N（名词） a technique for determining the age of minerals based on the occurrence in natural rubidium of a fixed amount of the radioisotope 87Rb which decays to the stable strontium isotope 87Sr with a half-life of 4.7 × 1011 years. Measurement of the ratio of these isotopes thus gives the age of a mineral, for ages of up to about 4 × 109 years 铷锶年代测定