238U and 232Th-decay series constraints on the timescales of crystal fractionation to produce the phonolite erupted in 2004 near Tristan da Cunha, South Atlantic Ocean

• Published in: Geochimica et Cosmochimica Acta
• Main Authors: Reagan, M.K., Turner, S., Legg, M., Simms, K.W.W., Hards, Vicky
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Elsevier 2008
• Subjects: Earth Sciences; Lava Lake; Tristan; South Atlantic Ocean
• Online Access: http://nora.nerc.ac.uk/id/eprint/4855/; http://www.sciencedirect.com/science/journal/00167037

Phonolite pumice found floating offshore of Tristan da Cunha following intense seismic activity southeast of the island July 29–30, 2004 was analyzed for 238U- and 232Th-series nuclides to determine initial 230Th, 226Ra, 210Pb, 210Po, 228Ra, and 228Th activities. The initial (210Po/210Pb) value of 0...