Petrology Tulane University Prof. Nelson Radiometric Dating Prior to the best and most accepted age of the Earth was that proposed by Lord Kelvin based on the amount of time necessary for the Earth to cool to its present temperature from a completely liquid state.
T he relative abundance of 87 Sr varies due to the radiogenic decay of 87 Rb. This variation depends on the amount of Rb present in the sample , the time elapsed since its formation and the Sr isotope composition initially present in the sample.
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The radioactive decay of rubidium 87 Rb to strontium 87 Sr was the first widely used dating system that utilized the isochron method. Because rubidium is concentrated in crustal rocks, the continents have a much higher abundance of the daughter isotope strontium compared with the stable isotopes.
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 87 Rb and strontium 87 Sr, 86 Sr. Development of this process was aided by German chemists Otto Hahn and Fritz Strassmann , who later went on to discover nuclear fission in December
StrataData has for many years offered a strontium isotope dating service to the petroleum industry in collaboration with Isotopic Ltd. Careful selection and preparation of material by experienced StrataData staff is key to the success of this technique.
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