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| 单词 | rubidium–strontium |
| 释义 | > as lemmasrubidium–strontium rubidium–strontium n. (attributive) designating a method of isotopic dating based on the measurement of the relative amounts in rock of rubidium-87 and its stable beta-decay product, strontium-87; of or relating to this dating method. ΘΚΠ the world > time > reckoning of time > chronology > [adjective] > branches of chronology or methods of dating geochronological1815 synchronological1836 Montelian1937 rubidium–strontium1941 dendrochronological1959 age-dated1984 1941 Bull. Geol. Soc. Amer. 52 536 (heading) Rubidium-strontium method. 1950 F. E. Zeuner Dating Past (ed. 2) x. 334 Minerals suitable for the rubidium/strontium method must be rich in Rb and free from non-radiogenic Sr. 1961 Times 25 Apr. 2/6 The Department..is at present using both the potassium-argon and rubidium-strontium methods. 1977 A. Hallam Planet Earth 184/2 Rubidium-strontium and uranium-lead measurements conclusively show that all these rocks were formed between about 3700 and 3800 million years ago. 2001 J. Powell Myst. Terra Firma iii. 49 The rubidium-strontium decay system is simpler than uranium-lead, and the principles are the same. < as lemmas |
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