THERMOLUMINESCENCE OF METEORITIC DIAMONDS OF THE INTERSTELLAR AND SOLAR ORIGIN

Artificially X-ray induced thermoluminescence (TL) of colloidal interstellar diamond of Murchison C2M, Krymka LL3.0 and Efremovka C3V chondrites as well as of diamonds from Novy Urey ureilite and Abee EH4 enstatite chondrite was measured In order to compare TL parameters of meteoritic and terrestrial diamonds the similar measurements were carried out for diamonds synthesised by the detonation and static methods, in CVD-process and those of terrestrial impact crater. The conclusions: a) TL parameters of interstellar diamonds are found to depend on the petrological type of the corresponding chondrites; b) interstellar diamonds could be formed as a result of extremely nonequilibrium process from the chemically bound carbon and/or from the amorphous carbon (e.g, soot) in gaseous phase under action of impact waves; c) Novy Urey ureilite and Abee enstatite chondrite diamond could be related to the impact formed species. Novy Urey diamond is considered to be originated from the amorphous carbon. whereas the Abee diamond is a result of graphite transformation.