辽南某地“双峰式”花岗岩与金矿的关系

“双峰式”花岗岩是岩浆热液型金矿床的成矿母岩。金矿床的分布严格受高峰值花岗岩的控制,距高峰值岩体最大距离不超过5km。岩石化学及地球化学特征表明“双峰式”花岗岩为岩浆型花岗岩,是同源同期不同阶段形成的一对花岗岩体,含金量明显呈现两个峰值,即早期为低峰值花岗岩,晚期为高峰值花岗岩,其时代为燕山期。“双峰式”花岗岩是找岩浆热液型金矿床的重要岩浆岩标志。

Bimodal Granite and Genesis of Gold Deposits in South Liaoning Provine

Bimodal granite is considered to be a mineralizing mother rock for magmatic hydrothermal gold deposits in south Liaoning provice. The spateal deposits in south Liaoning provice. The spaeial distribution of those deposits are controlled greatly by high-peak granite, with a longest distance of 5 km at couple of granite bodies which formed with the same source and period but different stages of the Yanshan Period, The content of gold element shows a Characteristics of two Peak-vaLues, early period being low granite and the late being high granite. Bimodal granite is devoted to the key indication magmatic hydrochermed gold de- posits, having quide significance in this region.