Most radioisotopic systems are associated with a closure temperature that is the

Question

Most radioisotopic systems are associated with a closure temperature that is the temperature below which daughter product does not escape from the mineral Suppose an eclogite crystallized at temperature of 750 degree C and this rock was dated by the Ar-Ar technique using muscovite, which has a closure temperature for Ar diffusion of about 400 degree C It is most likely that the age obtained will he YOUNGER or OLDER than the actual crystallization age (circle best answer (e.i Younger or Older) and IGNORE the possibility of the phenomenon known as excess Argon).

Explanation / Answer

clouser temperature is the temperature of the system that has cool so that there is  there is no longer any significant diffusion of the parent or daughter in external environment.if the system is in clouser temperature then we can determine the exact age of the rock or mineral sample. and if the daughter sample is less then there will be less accurecy in estimation of the age . if the temperature is more than the clouser temperature then we will get less daughter in system thus the age of the rock sample will younger than the actual age.

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