丹东四道沟金矿控矿构造及找矿方向

Ore-controlling Structure and Ore-hunting Guideline of the Sidaogou Au-deposit,Dandong,Liaoning

四道沟金矿赋存于辽河群盖县组中部岩性段的浅粒岩与少量片岩组成的互层带中,金矿化严格受层控。矿石矿物为石英和黄铁矿。金矿化受回曲构造控制,矿体主要产于次级倾向褶曲的核部。燕山期的韧性剪切变形切割破坏了金矿体。金矿化发生在吕梁期。该矿床为变质热液—混合岩化热液矿床。研究倾向褶曲是指导找矿的关键。

The Sidaogou Au-deposit occurs in the interclated zone which consists of mainly leptite and a small amoutn of schist and is locatetad dtthe central part of Gaixian Formation of Liaohe Group,with gold mineralization strictly controlled by the strata.Ore-mineral assemblage is quartz and pyrite.Ore bodies,controlled by Omega structure,sitrate at the core of the secondary tiltedfold,and have been broken up by ductile shear deformation at Yanshanian Perild.The gold deposit,formed at Luliang Perild,isrecognized as metamor-phosed-hydrothermal and migmatized-hydrothermal type.Tilted fold study is the key to guide the ore ex-ploration.