河南卢氏桃花金矿床地质特征及控矿因素

桃花金矿床位于苍房－胡家院加里东期石英脉型金成矿带上，区域性的瓦穴子－鸭河口断裂从矿区中部通过，是复经加里东－燕山期的历次地质事件形成的由北向南逆冲推覆构造，含金石英脉分布在该断裂以北，数量多，密度大，其走向近南北，受次级南北向断裂控制，石英脉中金的富集与黄铁矿含量成正相关关系，与烟灰色硅化及碳酸盐化关系密切，蚀变带宽，蚀变强烈时金品位较高，宽坪群地层为金的主要矿源层之一，区域性的瓦穴子－鸭河口断裂与矿区北部－韧性剪切带的叠加部位是成矿的有利地带，岩浆活动除为金矿化提供了热源和有利的物化环境之外，其本身也为成矿提供了部分物质来源。

Geological features and ore-controlling factors at Taohua gold deposit in Lushi of Henan province

Taohua gold deposit is located in Canfang_Hujiayuan Caledonian quartz vein type gold mineralization zone.The Waxuezi_Yahekou fault,crossing the central part of the ore district,is a thrust_nappe tectonics running from north to south,which was produced by Caledonian_Yanshan epoch geological events.The gold_containing quartz vein is mainly distributed in the north of the fault.There is a direct correlation between the gold and pyrite in the quartz vein.The gold mineralization is closely related to gray siliconizing and carbonating.The gold grade is high when the alteration belt is wide and alteration is strong.Kuanping group Strata is the main mineral source lay of gold.The folding position of Waxuezi-Yahekou fault and ductile shear zone in the north of the ore district is a favorable place for mineralization.Magmatite also provides part of gold for the deposit in addition to the source and environmental physio_chemistry condition.