MEASUREMENT OF TEMPERATURE DISTRIBUTION ON MINERAL SURFACE DURING ARGON-ARGON LASER STEP HEATING DATING

New pyrometric method of temperature distribution measurement on surface of natural mineral during laser ⁴⁰Ar/³⁹Ar dating has been devised. Peculiarity of this method is that it is relatively simple and does not require in availability of information about under test object absorption ability. It is very important during measurement of temperature distribution on surface of natural mineral. Proposed method includes forming of two digital pictures of sample in one frequency only, using of proposed method in conventional laser complexes intended for ⁴⁰Ar/³⁹Ar dating does not require large additional technical expense. Special program on the basis of platform Framework 4.0 has been devised for data processing automatization. Temperature field in several geological samples has been researched using method proposed. Data obtained indicates that temperature distribution in some of the samples during laser stepwise dating is sufficiently heterogeneous. Nonuniformity of temperature distribution can result in appearance do not taking into account inaccuracy in age value, that larger of analytical inaccuracy in few time. Thus, data obtained indicates that control of temperature distribution homogeneity during laser ⁴⁰Ar/³⁹Ar stepwise dating is necessary condition of accuracy dating result.

Keywords:
heat radiation, temperature, optical pyrometry, laser ⁴⁰Ar/³⁹Ar dating. 
УДК 535.233.4

MEASUREMENT OF TEMPERATURE DISTRIBUTION ON MINERAL SURFACE DURING ARGON-ARGON LASER STEP HEATING DATING