内蒙古官地冰长石—绢云母型银金矿床地质特征及找矿标志  

Geological characteristics and prospecting criteria of the Guandi adularia-sericite type electrum deposit in Inner Mongolia

作　　者：潘会彬 PAN Hui-bin(Power China Zhongnan Engineering Corporation Limited, Changsha 410016)

机构地区：[1]中国电建集团中南勘测设计研究院有限公司,长沙410116

出　　处：《矿产勘查》2019年第3期487-492,共6页Mineral Exploration

摘　　要：官地银金矿床位于华北地台北缘早古生代造山带内,为一冰长石—绢云母型(低硫型)浅成低温热液矿床。矿床的形成和分布严格受火山机构及与其有关的北西向断裂构造控制,矿体赋存于闪长岩、闪长玢岩、流纹斑岩和隐爆角砾岩内,多呈脉状产出。典型蚀变有硅化、绢云母化、黄铁矿化、冰长石化、碳酸盐化、高岭土化、绿泥石化等,并围绕矿体具有一定的蚀变分带。硅化、冰长石化、隐爆角砾岩以及铁锰帽是其重要的找矿标志,为矿区及其外围找矿指明了方向。Guandi electrum deposit is a adularia-sericite type epithermal deposit,which occurs in the early Paleozoic orogenic belt in the northern part of north China. The formation and distribution of the deposit are strictly controlled by the volcanism and its related north west fault structure, and the orebody is in diorite and suhvolcanic rocks and mostly pulse output. The typical alteration is silicification, sericitization, pyrite, ice long petrifaction, carbonation, kaolinization, greenification, etc., and has a certain alteration zone around the ore body. Silicification, ice feldspar, cryptoexplosive breccia and iron-manganese hat are important prospecting signs, indicating the direction of mine and its peripheral prospecting for Guandi electrum deposit.

关 键 词：银金矿床 地质特征 找矿标志 官地 内蒙古 

分 类 号：P618.51[天文地球—矿床学] P618.52[天文地球—地质学]