From 6 months seismic data continuously recorded by stations directly set up in Tian shan area, We picked clear teleseismic P arrivals, and three dimensional velocity image of Tian shan crust and upper mantle was given with the ACH technique.

Our discussion is focused on the location of the collision boundary between the Sino-Korea and Yangtze blocks in the Yellow Sea, the unusual upper mantle beneath the East China Sea continental shelf and its lithospheric formation and evolution, the cause of the high-velocity layer in the .

Based on the petrological, petrochemical and geochemical analyses about these rocks, it is concluded in this paper that the xenoliths were originated from the upper mantle, and comprised of both primitive pyrolite and the infusible solid residual of the upper pyrolite while the basaltic magma was .

In the former province, the upper mantle rocks consist of harzburgite and lherzolite, characterized by the concentration of mantle type elements (K T) and the smooth-weak enrichment type REE patterns; the ocean volcanic rocks are dominated by basic rocks of subalkaline and oceanic ridge type; lead isotopes are noted for 206Pb/ 204Pb<18.