摘要
通过对鄂西龙家沟地区地层、构造及岩浆岩分布特征进行研究分析,发现该脉石英矿床主要发育在区内中厚层白云岩中。根据脉体围岩地层分布特征,确定该种类型矿床的主要控矿构造部位为具张裂隙的背斜核部。包裹体特征研究显示该型脉石英矿体属低温热液裂隙充填型,物质来源主要为燕山期岩浆活动形成的富硅热液。良好的物质来源与中厚层白云岩的弱交代,是高品质脉石英形成的关键因素。
By studying and analyzing the distribution characteristics of stratum,structure and magmatic rocks in Longjiagou area,western Hubei,it is found that the gangue quartz deposit is mainly developed in the middle thick layer dolomite in the area.According to the distribution characteristics of surrounding rock strata of the vein body,the main ore-controlling structure of this type deposit is determined to be the anticline core with tensile fractures.Studies on the characteristics of inclusions show that this type of ganglionite ore body belongs to low-temperature fissure filling type,and the material source is mainly Si-rich hydrothermal fluid formed by the magmatic activity of Yanshanian period.Good material source and weak metasomatism of medium thick dolomite are the key factors for the formation of high-quality gangrenite.
作者
李赵阳
周文文
苗智聪
李伟文
LI Zhao-yang;ZHOU Wen-wen;MIAO Zhi-cong;LI Wei-wen(Hubei Branch of China National Geological Exploration Center of Building Materials Industry,Wuhan 430034,China)
出处
《中国非金属矿工业导刊》
2020年第6期6-9,53,共5页
China Non-Metallic Minerals industry
基金
湖北省自然资源厅地质勘查基金新立项目(编号:DTCG-190401)之子项目“脉石英找矿专项”(编号:[2019]27号)。
关键词
龙家沟
脉石英
成矿特征
矿床成因
Longjiagou area
vein quartz
mineralizing characteristics
genesis of deposit
