益阳硐坡金矿地质特征及富集规律初步探讨

益阳岩金矿床的勘查研究表明，该区含金石英脉均受剪切片理化带控制。构造剪切作用形成塑性变形褶皱和糜棱岩化，并使早期石英脉发生塑性变形或脆性碎裂，为成矿提供了构造空间。随着剪切作用的持续进行，派生了里德尔共轭裂隙，再次为金矿化提供了容矿空间。含矿溶液沿裂隙充填或胶结后期糖粒状石英，形成特殊的合会剪切带型金矿。因此，本文提出在北东一近东西向雪峰孤形构造带找金时，应视剪切片理化带为重点靶区，４１８队在硐坡矿段的金矿预测与验证说明，这一认识具有指导意义。

A Brief Discussion on the Geologic Properties and the Enrichment Origin of Tongpo Gold Deposit,Yiyang

The research of Yiyang gold vein deposit shows that the Aubearing quartz veins are controlled by the shear-schistose zone. The tectonic shearing is the cause of plastic deformation folds and myloni-tization of rocks and makes early quartz veins plastic deformation or brittletension fracture so that it provides the tecton- ic space for the metallization. With the proceed of the shearing, the conjugated tension fractures are derived,which provides once more the space for ore accumulation. Ore-bearing solution fills the fractures or cements the late sugar granular quartz to form a special gold deposit of sheared zone type. Therefore, authon believes that the shear-schistose zone should be taken as main target regions when looking for gold deposits. Experience of the prediction of gold deposits and the following check of it by 418 Brigade in Tongpo district show that this theory is an important guidance to indicate the existance of gold edposit.