Carbonate speleothems that contain ppb-ppm levels of uranium can be dated by the 238U-234U-230Th and 235U- 231Pa disequilibrium techiques. Accurate ages are possible if the initial concentrations of 230Th and 231Pa are well constrained and if the system has remained closed to post-depositional exchange of uranium, thorium, and protactinium.
|Original language||English (US)|
|Title of host publication||Studies of Cave Sediments|
|Subtitle of host publication||Physical and Chemical Records of Paleoclimate|
|Number of pages||21|
|State||Published - Dec 1 2007|