| 单词 | rubidium-strontium dating |
| 释义 | rubidium-strontium dating[ roo-bid-ee-uhm-stron-shee-uhm, -shuhm, -tee-uhm ] / ruˈbɪd i əmˈstrɒn ʃi əm, -ʃəm, -ti əm / noun Geology.a radiometric dating method whereby the ratio of rubidium isotope to strontium in a mineral is used to calculate the age of the mineral, based on the rate of radioactive decay of rubidium to strontium. Origin of rubidium-strontium datingFirst recorded in 1965–70 Words nearby rubidium-strontium datingrubescent, rubiaceous, Rubicon, rubicund, rubidium, rubidium-strontium dating, rubied, rubify, rubiginous, Rubik cube, Rubik's Cube Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for rubidium-strontium datingrubidium-strontium dating nouna technique for determining the age of minerals based on the occurrence in natural rubidium of a fixed amount of the radioisotope 87 Rb which decays to the stable strontium isotope 87 Sr with a half-life of 4.7 × 10 11 years. Measurement of the ratio of these isotopes thus gives the age of a mineral, for ages of up to about 4 × 10 9 years Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 |
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