长江中下游多金属成矿带逆冲推覆构造的控矿作用初探

长江中下游多金属成矿带中逆冲推覆构造的控矿作用表现在两个方面：１．深部的韧性推覆拆离剪切，控制作为主导成矿要素的中生代花岗岩的形成；２．浅表的台阶式推覆构造是重要的成矿构造，其控矿具有系统性和层控性等特征。

Ore-controlling of Thrust Nappe in Polymetallic Metallogenic Belt in the Lower and Middle Yangtze Reaches

There are two appearing styles for ore-controlling of tarust nappe in polymetallic metallogenic belt. As a leading metallogenic factor, the deep ductile shear of nappes controls the Mesozoic granitoids which surficial stepped thrust structures, with a systematic and stratabound ore-controlling features, acts.as a passage way, layout or accommodation for ore deposites. The polymetallic metallogenic belt in the lower and middle Yangtze reaches is an available position where stepped thrust faults develop in terms of regional tectonic zone. The occurrence and development of stepped thrust faults may be supposed by the box folds distributed widely in Tongling and Fanchang and stratabound ore deposits. Prospecting, tberefore, not only discover the faulted slope structures but also find out the faulted flat structures, which may constitute large scale ore deposits.