摘要
三官庙—韭菜沟地区处于秦岭造山带南秦岭北部逆冲推覆构造带内,钠长岩(脉)广泛发育,已发现多处金矿床(体),以三官庙金矿床和韭菜沟金矿床为典型代表。区内钠长岩包括脉型和岩株型,分别集中分布于区内东、西段;岩石类型有石英钠长岩、钠长角砾岩和交代钠长岩3种。论述了区内钠长岩及金矿床(体)地质特征,对钠长岩与金成矿作用的关系进行了探讨,认为在钠长岩形成过程中,形成以交代钠长岩为赋矿岩石的"韭菜沟式"金矿床,在钠长岩围岩地层的断裂系统中形成"三官庙式"金矿床,二者均是与钠长岩有关的同一成矿系列中的不同金矿类型。对矿区找矿方向进行了论述,提出矿区内叠加"中、大比例尺化探异常—含矿(特殊)地质体—控矿因素"等综合信息的找矿思路。
Sanguanmiao-Jiucaigou area is located in the thrust-nappe tectonic belt of northern part of south Qinling mountain in Qinling orogenic belt.In this area,the albitite are widely developed,and several gold deposits （ore bodies）, of which Sanguanmiao gold deposit and Jiucaigou gold deposit are the typical representative, are found.The form of the albitite in the area includes the vein-type and the mass-type.The former are mainly distributed in the east, and the later are mainly distributed in the west.The rock type of the albitite includes quartz-albitite, albite-breccia and metasomatic albitete.Based on the geological characteristics of albitite and gold deposits in the area,the relationship between albitite and gold mineralization is discussed.During the formation of albitite, Jiucaigou-type gold deposit, of which the metasomatic albitete is host lithology, was formed. And simultaneously, Sanguanmiao-type gold deposit was formed in the fault systems developed in the surrounding rocks of the albitite.They are different types of gold deposit in the same metallogenic series, which is associated with the albitite.In the end, the future prospecting direction is put forward.Utilizing comprehensive informations, combined about the medium-large scale geochemical anomalies, the ore-bearing （special） geological bodies and the ore-controlling factors, is the reasonable prospecting strategy in exploration zone prospecting.
出处
《黄金科学技术》
CSCD
2017年第1期35-45,共11页
Gold Science and Technology
基金
陕西省地质勘查基金项目"陕西省商南县三官庙金矿深部及外围普查"(编号:61201405270)和"陕西省商南县过风楼-豆腐尖金矿预查"(编号:61201304218)联合资助
关键词
钠长岩
金矿床
地质特征
找矿前景
三官庙-韭菜沟
albitite
gold deposit
geological characteristics
prospecting potential
Sanguanmiao-Jiucaigou
