Why are igneous rocks the best type of rock sample for radiometric dating

Share This Book. Retrieved 6 April Rubidium—strontium dating. Hohenberg Retrieved 21 January This normally involves isotope-ratio mass spectrometry. The equation is most conveniently expressed in terms of the measured quantity N t rather than the constant initial value N o.

The proportions of two of the isotopes of strontium, 86 Sr and 87 Sr, are measured and the ratio of 86 Sr to 87 Sr will depend on two factors.

8.4 Isotopic Dating Methods

Shows scientific proof against the question: It might be possible to date some chemical sedimentary rocks isotopically, but there are no useful isotopes that can be used on old chemical sedimentary rocks. Hanson; M. From Wikipedia, the free encyclopedia. The samples of rock collected for radiometric dating are generally quite large several kilograms to eliminate inhomogeneities in the rock.


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