摘要
在野外调查和对已有地质资料进行研究的基础上,阐述了赤峰地区萤石矿成矿地质背景,并重点探讨了萤石矿床的地质特征、控矿条件及时空分布规律。研究表明:萤石矿床属中低温热液充填交代型,燕山期花岗岩类为主要赋矿围岩;萤石矿床的空间分布主要受北东-北北东向断裂控制,以压扭性断裂最有利于成矿;萤石成矿可分为中低温热液成矿期和表生期2个成矿期,前者可进一步划分为早、中、晚3个成矿阶段;并按萤石矿床(点)的分布和控矿构造特点,将赤峰地区萤石矿床划分为5个成矿带;垂向上,矿化分带明显,自上而下表现为硅化顶盖、石英脉带、萤石脉带和尖灭带。最后,建立了赤峰地区中低温热液充填交代型萤石矿床的成因模式。
Based on field investigation and existed geological data researching, the background of nonmetallic mine＇s formation in Chifeng area is expatiate, with the metallogeny feature, metallogenic condition, temporal and spatial distribution of fluorite deposits selective analysed. Re- searchs shows that the tape of fluorite deposit is middle lower temperature hydrothermal filling metasomatism origin in Chifeng area;and the granitoid of stage of yanshan is main ore-host rock. Spatial distribution is mainly controlled by NE-NNE fault. The compression and scissor fault is in favor of mineralize. The metallogenic epoch of fluorite deposit can be divided into middle lower temperature hydrothermal and su- pergene. The former can be further derided into early, middle, later metallogenitic stages. In the vertical profile, mineralization zoning is divid- ed into silicified tectum, quartz vein zone, fluorite vein zone and pinch zone from upper to lower. Finally, the genetic models of middle lower temperature hydrothermal filling metasomatism type fluorite deposit in Chifeng area is established.
出处
《世界科技研究与发展》
CSCD
2012年第6期905-908,915,共5页
World Sci-Tech R&D
关键词
萤石矿床
成矿条件
成因模式
成矿规律
赤峰地区
fluorite deposits
metallogenic conditions
genetic models
metallogenic regularity
Chifeng area
