According to the isotopic age data of inherited zircons in igneous and metamorphic rocks which occur at the surface and are derived from deep crust of the North China, Yangtze blocks and Qinling-Dabie orogenic belt, the paper is mainly reports some new information of Archean rocks (basement) and briefly discusses its geological significance.

The generally north-depping crustal structures and the gently north-dipping Moho interface with several imbricate segment are referred to as the traces of a northward underthrusting of the Yangtze block.

The Neodymium isotopic compositions of metamorphic and sedimentary rocks from major geological units in the north margin of the Yangtze Block,together with previous data, can be used to make a Nd isotopic plot for the eastern section of the Yangtze Block.

Geological and geochemical characteristics of Mayuan Pb-Zn ore deposit on northern margin of Yangtze landmass;