Rb-sr dating method

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This was done by melting single millimetre-sized grains with a laser and measuring individual argon—argon ages with a highly sensitive gas mass spectrometer. Views Read Edit View history. However, barring an extraordinary coincidence, the result of such events will be that when we draw the isochron diagram, the minerals will no longer lie on a straight line. Thank You for Your Contribution! Because rubidium is concentrated in crustal rocks, the continents have a much higher abundance of the daughter isotope strontium compared with the stable isotopes.

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Ratios of stable, low mass isotopes, like those of O, S, C, and H can be used as tracers, as well as geothermometers, since fractionation of light isotopes can take place as a result of chemical process.

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Historical Geology/Rb-Sr dating

In theory, the samarium—neodymium method is identical to the rubidium—strontium approach. Aldrich and A. The rubidium—strontium pair is ideally suited for the isochron dating of igneous rocks. How does radiocarbon dating differ from the other methods of radiometric dating? Most work to date has centred around rhenium- or osmium-enriched minerals. Note that this is not always true.

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