Until I moved to Woods Hole Oceanographic Institution in 1988, I had the impression that mid-ocean ridge basalts (MORB) were the best-understood basalts on Earth. Their Sr isotopic compositions were uniform around 87Sr/86Sr = 0.7025, indicating their derivation from a well-stirred mantle source. Their Nd isotopic compositions were radiogenic, indicating that their source(s) had been light REE depleted for a long period of time. Their crystallisation sequence of olivine-plagioclase-clinopyroxene was well recognised (e.g., Bender et al., 1978; Grove and Bryan, 1983) and their major element characteristics indicated fairly low pressure (10 –...
- Share Icon Share
- Search Site
Nobumichi Shimizu; 5. WHOI: Sims-Based Approaches to MID-Ocean Ridge Magma Genesis. Geochemical Perspectives ; 8 (1): 65–85. doi:
Download citation file: