36Cl Dating of the Young Marine Sediments
Accelerate mass spectrometry(AMS) has been used to the measurement of specific activity I(36Cl/Cl) of high purity AgCl made of “nducing-adsorbed” 36Cl(and Cl) collected and purified from the surface of young marine sediments. Sediment age(t) was calculated from closed specific activity I0(36Cl/Cl) of sediment grain based on the radioactive decay law I=I0e-λt.The study shows that the specific activity I0 of closed 36Cl in earlier marine sediment has linear relationship with latitude. And taking account of latitude factor, the proportionality constant of specific activity-yield (μ) was obtained as 23.652 38. 36Cl specific activity of two sediments grains and a manganese nodule from seabed has measured and the ages of sedimentation for the samples are 83.2×