摘要
本文基于已有的勘查资料,利用Surpac建模软件构建鄂西北庙垭铌稀土矿床地层、岩体、断层及矿体的三维模型,直观呈现不同地质单元的空间展布和矿体富集规律,为深部及外围找矿预测提供参考依据。庙垭铌稀土矿床三维地质模型表明:(1)矿体的空间分布受杂岩体接触带与岩相转换带控制,高品位铌矿体产于正长岩与碳酸岩内,而稀土矿则主要富集于正长岩中;稀土矿体规模小于铌矿体,分布于大型铌矿体的中部至底部,空间上呈耦合关系;(2)Nb_(2)O_(5)高品位值在16~18勘探线之间,F1、F_(2)断裂带东段650 m的近地表处和断裂底界;TR_(2)O_(3)高品位值在空间上更靠近F_(2)断裂和地表,其矿体产状与F_(2)断裂相似,显示F_(2)具明显的控矿作用;(3)铌矿化在ZK14终孔深度以下和矿区西部均显示高品位,推测深部存在隐伏矿体,具有较好的找矿潜力。
Based on available exploration data,this study utilizes Surpac modeling software to construct a three-dimensional model of the strata,intrusions,faults,and ore bodies in the Miaoya niobium-rare earth(Nb-REE)deposit,northwestern Hubei.The model visually presents the spatial distribution of various geological units and the enrichment patterns of the ore bodies,providing a reference for prospecting predictions in deeper and peripheral areas.The 3D geological model of the Miaoya deposit reveals that:(1)The spatial distribution of the ore bodies is controlled by the contact zone of the complex intrusion and the lithofacies transition zone.High-grade niobium ore bodies occur within syenite and carbonate rocks,while rare earth mineralization is primarily enriched in syenite.The rare earth ore bodies are smaller in scale than the niobium ore bodies and are distributed from the middle to the bottom of the large niobium ore bodies,exhibiting a spatially coupled relationship.(2)High-grade values of Nb_(2)O_(5) are found between exploration lines 16 and 18,in the eastern section of the F1 and F_(2) fault zones at a shallow depth of approximately 650 m,and at the lower boundary of the faults.High-grade values of TR_(2)O_(3) are spatially closer to the F_(2) fault and near the surface,with the occurrence of the ore body similar to that of the F_(2) fault,indicating a significant mineralization controlling effect of the F_(2).(3)High-grade niobium mineralization is observed below the final depth of borehole ZK14 and in the western part of the mining area,suggesting the presence of concealed ore bodies at depth and indicating promising prospecting potential.
作者
张雨欣
李剑锋
黄啸坤
于玉帅
崔培龙
何洪涛
ZHANG Yu-Xin;LI Jian-Feng;HUANG Xiao-Kun;YU Yu-Shuai;CUI Pei-Long;HE Hong-Tao(College of Geographic Sciences,Liaoning Normal University,Dalian 116029,Liaoning,China;Wuhan Center,China Geological Survey(Geosciences Innovation Center of Central South China),Wuhan 430205,Hubei,China;Research Center for Petrogenesis and Mineralization of Granitoid Rocks,China Geological Survey,Wuhan 430205,Hubei,China;No.8th Geological Team of Hubei Geological Bureau,Xiangyang 441000,Hubei,China)
出处
《华南地质》
2025年第4期773-786,共14页
South China Geology
基金
中国地质调查局地质调查项目(DD202402022)
国家科技重大专项(2025ZD1009108)。
