238U–230Th–226Ra–210Pb–210Po Disequilibria Constraints on Magma Generation, Ascent, and Degassing during the Ongoing Eruption of Kīlauea

The timescales of magma genesis, ascent, storage and degassing at K lauea volcano, Hawai'i are addressed by measuring 238 U-series radionuclide abundances in lava and tephra erupted between 1982 and 2008. Most analyzed samples represent lavas erupted by steady effusion from Pu'u ' O' o and K upahianaha from 1983 to 2008. Also included are samples erupted at the summit in April 1982 and March 2008, along the East Rift Zone at the onset of the ongoing eruption in January 1983, and during vent shifting episodes 54 and 56, at N apau crater in January 1997, and Kane Nui O Hamo in June 2007.