胶东“玲珑-焦家式”金矿资源潜力与找矿

Potentiality and Ore Exploration of Linglong-Jiaojia Type Gold Resource in Jiaodong Area

摘要:

“玲珑焦家式”金矿的成岩成矿,从新太古代至中生代存在着继承性的成因关系,成矿具有长期性、多源性特点,但中生代燕山早期岩浆活动是主导成矿因素。区域化探成果显示胶东金矿直接矿源岩———郭家岭花岗岩金的丰度比原始矿源岩———早前寒武纪变质沉积岩系及侵入岩系金的丰度低1/2。郭家岭花岗岩面积在2 km2以上岩体定量估计金亏损总量与胶东金矿总量预测的资源量相当,从一个侧面展现了胶东金矿资源的潜力。望儿山金矿的找矿实践展示,焦家式金矿在1 000 m以下尚有巨大潜力,整个胶东金矿产区在3 000 m以上的资源潜力应在5000 t以上。

Abstract:

Ore-forming of Linglong-Jiaojia type gold deposit has the characteristics of long-term and multi-source property,but volcanic movement in early Mesozoic Yanshan period is major element for ore-forming.As proved by regional geochemical achievements,abundance of direct ore source rocks——Guojialing granite is 1/2 lower than its in original ore source rock——metamorphic sedimentary rocks and intrusive rocks in early Precambrian.Estimated gold loss amount of Guojialing granites with the square of 2km~2 is equal t...