The rubidium–strontium dating method (Rb–Sr) is a radiometric dating technique, used by scientists to determine the age of rocks and minerals from their content of specific isotopes of rubidium (87 Rb) and strontium (87 Sr, 86 Sr).

Rb 、Sr这两种微量元素中通常包含了重要的成岩信息 , 尤其是在研究花岗岩的成因方面具有独特之处 。因为花岗岩岩石中, Sr 通常以类质同象的形式存在于斜长石和磷灰石等早期形成的矿物中 ,而 Rb 则作为不相容元素,富集于残留熔体中,因此岩浆分异作用可以导致 ...

2023年1月10日 · The Rb/Sr ratios in lacustrine sediments have been used to indicate the intensity of chemical weathering in many works, namely, lower Rb/Sr ratios reflect stronger chemical weathering, while higher Rb/Sr ratios indicate weaker chemical weathering.

2014年1月1日 · Age determination with the Rb–Sr system revolves around the construction of an isochron using minerals or rocks with variable Rb–Sr ratios. Igneous rocks form by the cooling, crystallization, and solidification of magmas. During crystallization, different minerals form depending on pressure and temperature and the composition of the magma.

2017年10月8日 · Rb-Sr元素地球化学特征 Sr 为+2价碱土金属(第二主族) ，离子半径也较大(1.13Å) ， 故也被多数矿物排斥于结构之中； Sr也溶于水和含水相中，但溶解程度弱于元素Rb ； Sr属中等程度不相容元素； Sr的离子半径与元素Ca (0.99Å)相似，易于与Ca 在长石 中形成类质同象。

2025年1月5日 · Here, we test the in situ Rb-Sr technique on detrital white mica and biotite from basin margin and axis samples in a simple rift basin (Perth Basin, Australia) for which previously published detrital zircon U-Pb and Hf isotopic data exist.

2022年11月5日 · The Rb-Sr radioactive decay system was the first widely used dating system for rocks using the isochron method. By measuring the 87 Sr/ 86 Sr of several phases and calculating their 87 Rb/ 86 Sr from measurements of 85 Rb with knowledge of the 85 Rb/ 87 Rb ratio, an isochron can be produced, providing the age and initial 87 Sr/ 86 Sr ratio of ...

2014年1月1日 · With the advent and distribution of mass spectrometers, the Rb–Sr technique has become the most important tool in dating igneous rocks throughout Earth’s history and to the infant stages of the solar system.

Sr 为+2价碱土金属(第二主族)，离子半径也较大(1.13Å)， 故也被多数矿物排斥于结构之中； Sr也溶于水和含水相中，但溶解程度弱于元素Rb； Sr属中等程度不相容元素； Sr的离子半径与元素Ca (0.99Å)相似，易于与Ca 在长石 中形成类质同象。

2017年5月7日 · Sr-Ca发生类质同象的其它矿物有方解石、石膏、磷灰石和榍石； Sr趋于在地壳中发生相对于地幔含量的富集作用，但其富集程度小于Rb。 Rb/Sr ratios for various rocks: Ultrabasic 0.2 Basaltic 0.06 Granites 0.25-1.7 Shale 0.46 Sandstone 3 What accounts for huge range in Rb/Sr ratios of rocks?