Mechanisms of magma generation beneath Hawaii and mid-ocean ridges: uranium/thorium and samarium/neodymium isotopic evidence
Sims KW, Depaolo DJ, Murrell MT, Baldridge WS, Goldstein SJ, Clague DA. 1995. Mechanisms of magma generation beneath Hawaii and mid-ocean ridges: uranium/thorium and samarium/neodymium isotopic evidence. Science. 267(5197):508-512
Measurements of uranium/thorium and samarium/neodymium isotopes and concentrations in a suite of Hawaiian basalts show that uranium/thorium fractionation varies systematically with samarium/neodymium fractionation and major-element composition; these correlations can be understood in terms of simple batch melting models with a garnet-bearing peridotite magma source and melt fractions of 0.25 to 6.5 percent. Mid-ocean ridge basalts shows a systematic but much different relation between uranium/thorium.fractionation and samarium/neodymium fractionation, which, although broadly consistent with melting of a garnet-bearing peridotite source, requires a more complex melting model.
- Type
- Journal Article
- Authors
- Sims, Kenneth; Depaolo, Donald; Murrell, Michael; Baldridge, W; Goldstein, Steven; Clague, David
- Units
- HALE , HAVO
- Keywords
- 1800-1801, 1983, 230Th-234U Decay Series, Age Dating, Chemical Analysis, East Maui Volcano, East Rift Zone, Geochemistry, Haleakala Volcano, Hawaiian-Emperor Chain, Hotspot, Hualalai Volcano, Isotopes, Kilauea Volcano, Lava Flow, Loihi, Mauna Kea Volcano, Mechanism, Neodymium (Nd), Partial Melt, Prehistoric Volcanic Eruption, Rock, Samarium (Sm), Strontium (Sr), Submarine, Thorium (Th), Trace Elements, Uranium (U)