The rubidium-strontium dating method is a radiometric dating technique used by scientists to determine the age of rocks and minerals from the quantities they contain of specific isotopes of rubidium and strontium. Development of this process was aided by German chemist Fritz Strassmann, who later went on to discover nuclear fission with German chemist Otto Hahn and Swedish physicist Lise Meitner. The utility of the rubidium-strontium isotope system results from the fact that 87Rb decays to 87Sr with a half life of In addition, Rb is a highly incompatible element that, during fractional crystallization of the mantle, stays in the magmatic melt rather than becoming part of mantle minerals. The radiogenic daughter, 87Sr, is produced in this decay process and was produced in rounds of stellar nucleosynthesis predating the creation of the Solar System.
a technique for determining the age of minerals based on the occurrence in natural rubidium of a fixed amount of the radioisotope 87 Rb which decays to the stable strontium isotope 87 Sr with a half-life of ? 10 11 years. The rubidium-strontium dating method is a radiometric dating technique used by scientists to determine the age of rocks and minerals from the quantities they contain of specific isotopes of rubidium and strontium. rubidium-strontium dating A radiometric dating method based on the radioactive decay of 87 Rb to 87 Sr. Rubidium has two isotopes (85 Rb %, 87 Rb %), but only 87 Rb is radioactive. 87 Rb disintegrates in a single step to 87 Sr by the emission of a low-energy beta particle (see BETA DECAY).
Read More on This Topic. The radioactive decay of rubidium 87Rb to strontium 87Sr was the first widely used dating system that utilized Learn More in these related Britannica articles:. The radioactive decay of rubidium 87 Rb to strontium 87 Sr was the first widely used dating system that utilized the isochron method.
Rubidium-strontium Rb-Sr dating was the first technique in which the whole-rock isochron method was extensively employed.
Certain rocks that cooled quickly at the surface were found to give precisely defined linear isochrons, but many others did not. Some studies have shown that rubidium is very.
The noun RUBIDIUM-STRONTIUM DATING has 1 sense: 1. geological dating based on the proportions of radioactive rubidium into its decay product strontium; radioactive rubidium has a half-life of 47, years. Familiarity information: RUBIDIUM-STRONTIUM DATING used as a . Rubidium-strontium dating definition, a radiometric dating method whereby the ratio of rubidium isotope to strontium in a mineral is used to calculate the age of the mineral, based on the rate of radioactive decay of rubidium to strontium. Rubidium-strontium dating, method of estimating the age of rocks, minerals, and meteorites from measurements of the amount of the stable isotope strontium formed by the decay of the unstable isotope rubidium that was present in the rock at the time of its formation.
For example, the concentrations of rubidium and the strontium into which it decays, or those of samarium and its decay product neodymium, indicate that the oldest meteorites formed some 4. Using these proportions it is possible to identify the amount of radiogenic 87 Sr present.
Originally the above proportions were assumed, but today it is more usual to plot 87 Sr: 86 Sr against 87 Rb: 86 Sr to produce a straight-line isochron from which the age of the mineral can be determined.
When using the 87 Rb: 86 Sr method it is customary to use whole-rock samples in the analysis, because although 87 Sr may leak from one mineral to adjacent minerals over time it usually remains in the system.
Isochrone equation Rb Sr method
The method has particularly been applied to ancient metamorphic rocks. July 10, Retrieved July 10, from Encyclopedia.
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More From encyclopedia. The two main types of dating methods are Radioactive DatingRadioactive dating is a method of determining the approximate age of an old object by measuring the amount of a known radioactive element it contains Carbon DatingCarbon dating is a technique used to determine the approximate age of once-living materials. Absolute dating methods involv.
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rubidium-strontium dating in British English noun a technique for determining the age of minerals based on the occurrence in natural rubidium of a fixed amount of the radioisotope 87 Rb which decays to the stable strontium isotope 87 Sr with a half-life of ? 10 11 years.
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Numerology Chaldean Numerology The numerical value of rubidium-strontium dating in Chaldean Numerology is: 8 Pythagorean Numerology The numerical value of rubidium-strontium dating in Pythagorean Numerology is: 4.
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