isotopic ratio meaning in English
同位素比值
Examples
- The pb isotopic ratios show the characteristic of dupal anomaly and influence of ocean sediment to the source
Pb同位素研究也显示了dupal异常型的特征以及大洋沉积物对源区的影响。 - Some samples display em - like sr - nd isotopic ratios , thus providing the evidence for the old , enriched mantle beneath western north china craton
一些样品显示了emi型sr - nd同位素特征，从而为华北西部存在古老交代富集地幔提供了证据 - Although the products have same chemical compositions , they will exhibit various isotopic ratios if they produced from different sources or by different chemical / physical processes
虽然物质具相同之化学组成，但如果来源不同或经不同物理化学过程所产生，其同位素比值会因同位素的分化作用而有差异。 - The stable isotopic research is established by studying the discrepancy in isotope ratio , which was caused by isotope fractionation , and the isotopic ratio difference can be determined by mass spectrometer
稳定同位素的研究主要是建立在此同位素分化作用所造成的同位素比值差异，而此同位素比值差异可被质谱仪测知。 - All of the mafic samples have age - corrected moderate enriched sr and enriched nd isotopic ratios and the felsic rocks span larger range in the initial sr and nd isotopic ratios than mafic volcanics , similar to isotopic compositions of lower crust of north china block
在sr - nd同位素组成上，中基性火山岩为中等富集的sr和低的nd同位素比值；中酸性火山岩的sr同位素比值总体较中基性岩高且变化大，类似华北陆块下地壳岩石的同位素组成特征。