胶西北金矿集区“三S”控矿机制探析

Exploration of "tri-S-type" ore-controlling mechanism of Northwest Jiaodong High Gold Ore Concentration Area

胶西北金矿集区自西向东的三山岛、焦家、招平断裂带是世界著名的金成矿带,其上盘均为早前寒武纪变质岩系,呈现断续相连构成了横向上"S"型的大型伸展构造; 3条断裂蚀变带各自无论从纵向(走向)上,还是从垂向(倾向)上都呈"S"型展布延伸,而金矿体就赋存于这3个方向各自呈"S"型的构造所控制的蚀变带中,这就形成了胶西北金矿集区独特的"三S"控矿机制。"三S"控矿机制理念的提出,对寻找深部矿体具有重要的指导意义。

The EW trending Sanshandao,Jiaojia and Zhaoping fault zone are three world-famous gold metallogenic belts in Northwest Jiaodong High Gold Ore Concentration Area. The hanging walls of these faults are all composed of Early Precambrian metamorphic rocks. Based on them,these fault zones constitute a large 'S' type extensional structure in the section perpendicular to the strike of these three faults. Moreover,each of these three fault zones extends and is distributed in 'S' type ones both along the strike and inclination,and gold ore bodies occur in the structural alteration zones controlled by these three 'S' type structures. It is called the unique 'tri-S-type' ore-controlling mechanism of Northwest Jiaodong High Gold Ore Concentration Area. It is believed that this new idea is helpful in discovering deep and blind ore bodies.