论文部分内容阅读
矿床地质特征团结沟矿床是我国著名的斑岩型金矿床.矿区内主要发育一套侏罗-白垩纪中酸性陆相火山岩及次火山岩.火山活动初期以中酸性熔岩为主,包括玄武安山岩、英安岩等;中期有次火山岩相的花岗闪长斑岩侵入,并带来该区的工业金矿化;火山活动末期以喷发活动为主,并生成各种中酸性火山碎屑岩,包括火山角砾岩、晶屑凝灰岩、凝灰质砂岩等;其底部火山岩中见有含矿斑岩体的角砾.钾氩法测定含矿斑岩体的年龄是100、102、112.6百万年,为燕山期产物.火山岩周围是元古界片岩,更远处往西15公里有混合
The geological characteristics of the deposit Tuanjiegou deposit is a well-known porphyry type gold deposit in our country, where a series of Jurassic-Cretaceous medium-acidic terrestrial volcanic rocks and sub-volcanic rocks are mainly developed.The volcanic activity is dominated by medium-acid lavas, including basaltic andesite, Intrusion of granodiorite porphyry with secondary volcanic facies in the middle period and industrial gold mineralization in this area; At the end of volcanic activity, the eruption activity is dominant, and various moderate-acid volcaniclastic rocks are formed, Including volcanic breccias, crystal tuffs, tuffaceous sandstones, etc. The bottom volcanic rocks are found with breccias containing ore-bearing porphyry bodies.The age of the ore-bearing porphyry bodies measured by potassium-argon method is 100,102,112.6 million years For the Yanshan period products around the volcanic rocks is the Proterozoic schist, farther west 15 km mixed