The geochemical characterization of melt glasses formed from rocks by nuclear explesion is made in this paper, and the composition of melt rocks from the hypervelocity meteorite tnpact carters was obtained. Under the conditions far from thermodynamic equilibrium the chemical composition of various glasses and melt rocks is quite homogeneous. They were formed by mixing-melting of bedrocks close to the point of impact (and/or nuclear explosion) in a certain proportion. The concentrations of major and trace elements in the melts are restricted by the background values of target rocks.By high-temperature turbulant flow the material is shown to be mixed melts which chemically is extremely homogeneous during hypervelocity impact. Thus, we can calculate the percentage of components of target rocks on the basis of chemical composition of the melt rocks.The tektite was formed from the upper crust rocks by impact melting. The formation mechanism of tektite is similar to that of glasses by nuclear explosion and melt rocks by impact. Tektites from same strewn field show their chemical composition very approximate to that of their crater bedrocks, but different chemical compositions of tektites are usually attributed tc different combinations of parent rocks. Therefore, we can calculate source rock’s components of tektite. The different ratios A12O3, K2O and Na2O to SiO2 in tektites from the Australasiantektite strewnfield indicate the existance of several craters in the Austalian strewnfield——atleast the Indochinites, Javaites, philippinites and Australites source craters were defined.