ANALYSIS ON GOLD AND COPPER OREFORMING SETTING WITH ORE-FORMING SYSTEM OF EASTERN TIANSHAN

According to tectonostratigraphical division principle, the different units in gold and copper oreforming belt of eastern Tianshan are divided into order and disorder two typical stratumrock assemblages, two tectonovolcanic activity belts and two oreforming system of paleocontinental margin. The collision orogeny and ductile shear zone have strong spacetime coupling. The island arc volcanic rock is distributed in zoning.Graywacke is formed on the edge of island arc in the north part of Tarimu continent. Collision granites are distributed in eastwest belting with middlesmall type. There are geochemical part and geochemical province. There are multistage features of tectonic evolution, which can be divided into 12 stages. The collision orogeny can be detailed classfied three stages and six developped phases.Gold and copper oreforming time is mainly in midlate Hercynian epoch(290～230?Ma).Different oreforming system of palecontionental miargin have different metallogenic types and characteristics.Direction of prospecting for gold and copper deposits are put forward. [