A number of features of zircon (ZrSiO4), including high U-Th concentrations, high
abundance in a wide range of lithologies, refractory nature under metamorphic and some …

In one form or another, geochronologists have been practicing thermochronology1, the use
of radioisotopic dating to constrain thermal histories of rocks and minerals, for over 40 years …

Closure temperature (T c) of a geochronological system may be defined as its temperature
at the time corresponding to its apparent age. For thermally activated diffusion (D= D oe …

The measured radiogenic 40 Ar loss from sized biotite (56% annite) samples following
isothermalhydrothermal treatment have provided model diffusion coefficients in the …

Hydrothermal treatment of closely sized muscovite aggregates in a piston-cylinder
apparatus induced 40Ar∗ loss that is revealed in 40Ar/39Ar step heating spectra. Age …

Measured radiogenic 40 Ar loss from two compositionally contrasting hornblendes following
isothermal-hydrothermal treatment have provided model diffusion coefficients in the …

Since the end of World War II isotope geology has grown into a diversi fied and complex
discipline in the earth sciences. It has progressed by the efforts of a relatively small number …

This study provides new information on the timing and distribution of Mesozoic magmatic
events in the Sierra Nevada batholithic complex chiefly between 36° and 37° N. latitude. U …

Overprinting of white micas from high pressure, low to medium temperature (M 1)
metamorphic assemblages in pelitic schists on Naxos during subsequent thermal dome (M …

With the growing recognition during the last two centuries that the Earth has an immense
age and processes over long periods of time have changed the morphology and …