密云地体铁矿成矿规律及找矿方向研究

A RESEARCH ON THE ORE FORMING REGULARITY AND THE PROSPECTING DIRECTION OF IRON DEPOSIT IN MIYUN TERRAIN,BEIJING,CHINA

应用地体构造理论 ,对密云地体含铁建造特征及构造对铁矿体的控制规律进行了研究。认为表壳岩为原始含矿围岩 ,TTG杂岩破坏了原含矿岩系的连续性 ,使表壳岩呈残体漂浮或呈包体形式被包裹在 TTG杂岩中。矿体的赋存状态主要受两期共轴迭加褶皱构造和韧脆性剪切断裂复合控制。

The characterestics of BIF and the tectonical control patterns on the iron ore body in the Miyun Terrain have been studied with the terrain theory.This paper concludes that the supercrustal rocks are the original host and the TTG complexes intorrupted the continuity of the host and the supercrustal rocks occur as floating residuals or inclusions in the TTG complexes. The ore body was contolled by both the co axial overprinted fold of two periods and the ductil brittle shear fault.