摘要
本文通过矿区地质调查,结合该区域以往矿产成果,新发现铌钽矿点1处,圈定铌钽矿体3条,铌钽矿化体6条。赋矿地质体为碱性岩脉,控矿构造为北西向断裂,赋矿岩石为碱性正长斑岩,矿石矿物为铌铁矿、褐钇铌矿、重钽铁矿,脉石矿物以正长石、正条纹长石、微斜条纹长石为主,少量斜长石、黑云母、绢云母、石英,副矿物见榍石、磷灰石。矿床成因类型为岩浆热液型。区域上碱性岩脉分布广泛,数量较多,碱性岩型铌(钽)矿找矿潜力优越。
In this paper,based on geological surveys in the mining area and previous mineral exploration achievements in the region,a new niobium ore occurrence was discovered,and three niobium-tantalum ore bodies as well as six niobium-tantalum mineralized bodies were delineated.The ore-bearing geological bodies are alkaline dikes,within which the ore-bearing rock is alkaline syenite porphyry;the ore-controlling structure is a northwesttrending fault.The ore minerals include niobium-iron ore,yttrium-niobium ore,and heavy tantalum-iron ore.The gangue minerals are mainly orthoclase and microcline,with minor plagioclase,biotite,sericite,and quartz.The accessory minerals are titanite and apatite.The deposit is genetically classified as a magmatic hydrothermal type.Alkaline dikes are widely distributed and numerous in the area,indicating that the prospecting potential for alkaline rock-type niobium-tantalum ore is high.
作者
李超
张洪深
乔倩
Li Chao;Zhang Hongshen;Qiao Qian(Shaanxi Geological Exploration Institute of China Chemical Geology and Mine Bureau,Xi'an,Shaanxi,710065,China)
出处
《化工矿产地质》
2025年第4期305-312,共8页
Geology of Chemical Minerals
基金
陕西省地质勘查基金陕西省西乡县猫儿寨一带稀有稀土矿普查(编号:61202211426)。
关键词
铌钽矿
地质特征
成因分析
西乡县
Niobium deposit
Geological characteristics
Genetic analysis
Xixiang county
