COMPARISON OF SEDIMENTATION RATES OBTAINED BY 32SI AND URANIUM DECAY SERIES DETERMINATIONS IN SOME SILICEOUS ANTARCTIC CORES

Three Antarctic cores were analyzed for 32Si and diagnostic isotopes of the uranium decay series for sediment accumulation rate determination. The 32Si method gives rates of about 470 mm/103 yr over the last 1000 years and 230Thexcess method gives sedimentation rates of slightly less than 6 mm/103 yr on the 105 yr scale. The 32Si results and the 230Th rates agree with earlier results for the Antarctic region. © 1969.