Diffusion kinetics of samarium and neodymium in garnet, and a method for determining cooling rates of rocks
Experimental determinations of the diffusion coefficients of samarium and neodymium in almandine garnet and theoretical considerations show that one cannot assign a sufficiently restricted range of closure temperature, TC, to the samarium-neodymium decay system in garnet for the purpose of constraining the cooling rate. However, it is shown that the samarium-neodymium cooling age of garnet can be used to calculate both cooling rate and TC if the temperature and age at the peak metamorphic conditions are known.
Ganguly
J
J. Ganguly and M. Tirone, Department of Geosciences, University of Arizona, Tucson, AZ 85721, USA. R. L. Hervig, Center for Solid State Science, Arizona State University, Tempe, AZ 85287, USA.
Tirone
M
Hervig
RL