摘要
在东秦岭钼成矿带最近探明的石窑沟大型钼矿床,位于近东西向马超营断裂带与北东向焦园断裂带的交汇部位,获得钼金属储量10余万吨,平均品位0.064%。矿区位于狮子庙金矿田上,钼矿外围有多个金及多金属矿床及矿点。笔者根据石瑶沟钼矿的赋矿地质条件和化探异常特征,阐述了钼矿的成矿地质条件,钼矿与外围金(银)矿之间的成因联系,提出本区成矿母岩为隐伏的小斑岩体,矿化富集部位为小岩体内外接触带,金银矿质来源主要为坡前街组地层,其成矿与岩浆活动关系密切。同时指出钼矿与金(银)矿床应属于同一成矿系统。据化探成果和钻探资料推测,在隐伏小岩体的周边还存在有类似石瑶沟隐伏岩体的小隐伏岩体,为该区今后的工作提出了新的找矿思路。
The Shiyaogou deposit,located in the intersection part of the nearly EW-strike Machaoying fault belt with NE-strike Jiaoyuan fault belt,is a large molybdenum deposit newly discovered in molybdenum metallogenic belt,east Qingling,Henan Province.Currently,the proved reserve of the deposit is more than one hundred thousand tons,and the average grade is 0.064%.This molybdenum deposit is located in the Shizimiao gold orefield,and there are several gold or polymetallic deposits or ore spots in the surrounding area.Base on the ore-bearing conditions and the characteristics of the geochemical anomaly,the paper mainly expounds the ore-forming geological conditions and genetic connection between this molybdenum deposit and the surrounding gold deposits,and proposes that the mineralization mother rock is the concealed small pophyry intrusions,the mineralization enrichment position is in the internal or external contact zones of the small intrusion bodies.The ore-forming material source of the gold and silver is Poqian Formation,which is closely related to magmatism.Meanwhile,the author suggests that the deposits of the molybdenum and glod,silver belong to a same ore-forming system.According to the geochemical results and drilling data,it is predicted that there are some small concealed ore-bearing pophyries which are similar to the concealed pophyry bodies in Shiyaogou,which provide a new clue for further prospecting work.
出处
《地质调查与研究》
2010年第1期19-27,共9页
Geological Survey and Research
基金
黄金专项业务费用项目
项目名称:河南省栾川县石瑶沟一带钼金矿普查
关键词
成矿地质条件
隐伏岩体
化探异常
石瑶沟钼矿
concealed rock body
Shiyaoguo mo deposit
ore-forming condition
geochemical anomaly
