夹皮沟金矿带蚀变岩型金矿体(带)的分布及找矿方向

夹皮沟金矿带处于华北地台北缘东段与吉黑造山带结合部的台区边缘构造活动带上,区内金矿床主要产在夹皮沟花岗岩-绿岩带和哑铃状钾质花岗岩之间的断裂带中。根据近几年在夹皮沟区域的勘查工作成果,以新探获的蚀变岩型金矿体(带)为研究对象,认为区内发现的蚀变岩型金矿体(带)多与区域韧性剪切带上下盘边界平行,且与含有硅化、绢云母化的绢英岩密切相关,金矿化主要受晚期脆-韧性剪切作用控制,并对未来的找矿方向进行了探讨。

Discussion about the distribution of altered rock type gold ore body(belt) and prospecting direction in Jiapigou gold belt

Jiapigou gold metallogenic belt is located in the active tectonic belt on the margin of the craton that is on the joint section of Ji-Hei orogenic zone and the eastern part of northern margin of North China Craton. Gold de-posits developed in the area usually occur within the fault belt between Jiapigou granite -greenstone belt and the dumbbell-shaped potassic granite. According to prospecting results of Jiapigou area in recent years,the paper studied the newly explored altered rock type gold ore body. It is concluded that altered rock type gold ore bodies are usually parallel to the heading and hanging side boundary of ductile shear zones,and are closely associated to silicified and sericitized sericitolite;the gold mineralization is mainly related to brittle-ductile shearing. The paper also discusses the future prospecting direction.