A new type of gold deposit-interlayer-slide-breccia gold deposit, controlled by detachment structure , was discovered recently along the northeast boundary of the Jiaolai Basin in Jiaodong region.

Gold mineralization associated with detachment structure in Jiaodong region;

Detachment fault were closely associated with detachment fold and they formed the detachment structure together in caprock of platform which is a part of Yangtz platform.

The listric normal faults formed by the extention processeson the mine field s edge crossed on the deeplevel detachment structure plane,but the shallowlevel detachment structures were the result of thegravity gliding after the earth crust extended.

The confirmation result of decollement structure in the Zhaitang district of western Beijing in 1991 to 1992 tell us, that the concealed coalfields should be the major prospecting work in the future in the coal basin of western Beijing.

Based on new data from 1∶50 000 regional survey,this paper gives a detailed description on the layer and block features of decollement structure,mechanical and physical properties of rocks and the major and subordinate sliding planes in the Dagangzhou area.

In the North Sinian stage(Eocene-Oligocene),partial tectonic detachments mainly occurred at the intersection among the bottom of lithosphere and pre-existing NW or N-E and NNE striking lithospheric faults.

Owing to the decollement occurring in later stage,the early angular uncon- formity has been resplaced by the blind unconformity——a typical tectonic contact relation of the metamorphic rock area.