Geochronological studies on rock and minerals is carried out by:

Rubidium- Strontium method

Samarium-Neodymium method

Uranium-lead method

Initially, the organisation had fabricated one mass spectrometer in 1964. Presently, a fully automated, multicollector thermal ionisation mass spectrometer, VG 354 is used for isotopic analyses of Rb, Sr, Sm, Nd, U and Pb.

Data generated from this laboratory have found place in different publications.

Sulphur isotope analysis is also carried out with the help of a triple collector, electron bombardment (gaseous source) mass spectrometer equivalent to VG 903. Facility for the separation of CO₂ gas from carbonate mineral sample in order to carry out carbon isotope analyses is also available.