Primeval Strontium-87/Strontium-86 Ratio

Abstract

IN a previous communication¹ I described an attempt to estimate the initial concentrations and partition coefficients of rubidium and strontium. The calculation was performed based on two possible values of the slope of the line representing the abundance correlation between rubidium and strontium. In Table 1 are shown the results of previous calculations. (Series I corresponds to the relevant slope = 0.735, while series II to the slope = 0.865.) In addition, theoretical, corrective estimation of original concentration was made for three samples (Nos. 9, 11 and 12) by assuming that they were more or less affected by partial melting (Table 2). In this connexion, it has been suggested that series I is advantageous, though only slightly, over series II.