87Sr/86Sr ratios in basalts from islands in the Indian Ocean
87 Sr/ 86 Sr ratios of basalts from islands in the Indian Ocean (0.7040) are higher than those of basalts dredged from the Mid-Indian Ocean Ridge (0.7034). The sources of the island basalts have apparently not been in equilibrium with the source of the ridge basalts for roughly 10 9 years. Both ridge and island basalts in the Indian Ocean are higher in 87 Sr/ 86 Sr than are rocks from similar settings in the eastern Pacific.
Earth and Planetary Science Letters↗