Rubidium radioactive dating


Views: 19815 | Post Uploader: Revizzzor | Categories: Older Men Rb and Sr are relatively mobile alkaline elements and as such are relatively easily moved around by the hot, often carbonated hydrothermal fluids present during metamorphism or magmatism. The Rb-Sr dating method has been used extensively in dating terrestrial and lunar rocks, and meteorites. One of the major drawbacks and, conversely, the most important use of utilizing Rb and Sr to derive a radiometric date is their relative mobility, especially in hydrothermal fluids. The application of Sr isotope stratigraphy is generally limited to carbonate samples for which the Sr seawater curve is well defined. Rubidium substitutes for potassium within the lattice of minerals at a rate proportional to its concentration within the melt. During fractional crystallization , Sr tends to become concentrated in plagioclase , leaving Rb in the liquid phase.

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