河南省嵩县东湾-蛮峪地区金矿床地质特征及矿床成因分析

Geological Features and Deposit Cause Analysis of Gold Deposit of Dongwan-Manyu of Song County of Henan Province

东湾-蛮峪地区金矿床赋存于熊耳群鸡蛋坪组火山岩中,金矿体呈不规则脉状产出于熊耳群地层断裂构造带内的英安岩、流纹质英安岩中,严格受地层产状和地层断裂构造带控制,并与燕山期岩浆侵入体密切相关。矿石中金属矿物以黄铁矿为主,方铅矿、闪锌矿和褐铁矿次之。矿石呈自形-半自形晶、它形晶粒状、交代残余和斑状结构,浸染状、细脉-浸染状、脉状-网脉状和蜂窝状构造。综合研究认为,矿床属岩浆热液形成的构造蚀变岩型金矿。

Gold deposit of Dongwan-Luanyu hosted in volcanic rocks of egg group of Xionger group. Gold deposit is irregularly in the dacite and rhyolitic andesites of fault structural zone of Xionger group formation, being controlled seriously by formation＇ s occurrence and formation＇ s fault structural zone, and having close connection with Yanshanian magma intrusion. Metallic minerals in the ore rocks is mainly pyrite, secondly galena, sphalerite and limonite. Ore rocks are euhedral-subhedral, anhedragranular, metasomatic relict texture and porphyritic texture , disseminated structure, veinlet-disseminated structure, vein-net vein structure and honeycomb structure. By comprehensive study, it is thought that deposit is structural and altered rock type gold deposit.