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natural abundance |
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natural abundance [′nach·rəl ə′bən·dəns] (nucleonics) The abundance ratio of an isotope in a naturally occurring terrestrial sample of an element. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Trace element, rare-earth-element (REE) and isotopic abundances reflect a variety of factors including the source of the magma, the percentage of the source rock that undergoes melting, the extent of crystal fractionation, and the contamination of either magma from adjacent rocks or from other magmas of other arc systems. The first approach uses variations in isotopic abundance of the stable end products arising from radioactive decay. Detailed information on isotopic abundance is provided for all naturally occurring elements. |
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