Rubidium–strontium dating - Wikipedia
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).
LA-ICP-MS/MS Single-Spot Rb-Sr Dating - Wiley Online Library
Until now, LA-ICP-MS/MS Rb-Sr ages were constrained using conventional isochrons on a contiguous set of Rb-Sr data. In this contribution, we present a straightforward procedure on how to measure, calculate and validate Rb-Sr ages from individual laser spots even from detrital grains devoid of context.
黄超等-中国科学：云母Rb-Sr等时线年龄原位微区LA-ICP-MS/MS …
2023年7月12日 · Rb-Sr 同位素体系是确定地质体年龄以及示踪源区属性等方面最重要的放射性同位素体系之一。由于云母具有很高的 Rb/Sr 比值，且其 Rb-Sr 同位素体系封闭温度高于中、低温矿产的成矿温度，因此云母 Rb-Sr 同位素是确定中、低温热液矿床成矿时代的最佳对象。
Advances in in-situ Rb-Sr dating using LA-ICP-MS/MS
2022年11月5日 · Rb-Sr isotopes of multiple reference materials and geological samples have been analyzed by LA-ICP-MS/MS to evaluate the method for dating rocks throughout the geological record. The quality of Sr isotopic data can be greatly improved by external calibration of …
A high throughput Rb-Sr dating method using solution tandem …
2021年3月16日 · Here, we describe a method that uses ICP-MS/MS to measure 87 Sr/ 86 Sr combined with a standard addition calibration for precise determination of Rb/Sr, allowing efficient generation of Rb-Sr ages. The method is demonstrated on a suite of ~50 to 90 Myrs (million years) old celadonite samples that are dated with age uncertainties typically of ± ...
Rb–Sr Dating - SpringerLink
2014年1月1日 · The Rb–Sr dating technique is among the most widely used and most powerful dating tools available in Earth sciences. It is an effective means of dating igneous rocks or metamorphic events and, under special circumstances, can be applied to sedimentary sequences, ore deposits, and past volcanic eruptions or to date fluid events in the deep crust.
The Rb–Sr Method (Chapter 3) - Radiogenic Isotope Geology
Rb–Sr total rock isotope studies on Precambrian charnockitic gneisses from South Norway: evidence for isochron resetting during a low-grade metamorphic-deformational event. Earth Planet. Sci.
Rb–Sr Geochronology (Igneous Rocks) | SpringerLink
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.
Of all dating methods, the Rb-Sr method has the strongest connection with petrology and geochemistry. Rubidium and strontium are rare elements, Rb never forms minerals of its own. The elements Rb and Sr react similarly to K and Ca, therefore the reactions of Rb and Sr trace to some extent the reactions of K and Ca. Especially in granitic
Structural and functional analyses of the repressor, RbsR, of …
The DNA sequence encoding the rbs repressor protein, RbsR, has been determined. Amino acid sequence analyses of the product of an rbsR-lacZ fusion and of affinity-purified RbsR demonstrate that translation begins at an unusual codon, TTG, and that the initial amino acid is removed during maturation of the protein.