摘要
竹山土地岭一带位于南秦岭石泉—安康—竹山断裂带北侧碱性岩带中,志留纪板块边缘伸展环境为区域内的稀有稀土矿提供了非常有利的成矿条件。1∶5万水系沉积物测量与1∶2 000岩石原生晕异常结果显示,铌、钽异常均与志留纪粗面质火山岩类密切相关。矿体赋存于粗面质火山岩中,含矿岩系为粗面岩、粗面质凝灰熔岩、粗面质岩屑晶屑凝灰岩、含钾长晶屑凝灰质绢云千枚岩等,主要含铌钽矿物为铌铁矿、钽铌铁矿。土地岭铌钽矿床与庙垭铌稀土矿床、杀熊洞铌稀土矿床以及天宝铌矿床应属同一成矿系列,成因类型属于过渡类型的矿床,兼具岩浆型和岩浆热液型矿床的特征。初步估算NbTaⅠ1、NbTaⅡ1、NbTaⅡ2号铌钽矿矿体(Nb_2O_5、Ta_2O_5) 334资源量具大型以上铌钽矿床规模。庙垭西部文家湾—黄家沟一带具有类似成矿地质条件,成矿潜力巨大,极具找矿前景。
The Zhushan Tudiling area is located in the alkaline rock zone in the north of the Shiquan-Ankang-Zhushan fault zone of the South Qinling Mountains.The extensional environment of the Silurian plate margin provides favorable metallogenic conditions for the rare earth deposits in the region.The results of1∶50000stream sediment survey and1:2000rock primary halo anomaly show that the niobium and tantalum anomalies are closely related to Silurian trachytic volcanic rocks.Ore bodies are hosted in trachyte volcanic rocks.The ore-bearing rocks are trachyte,trachyte tuff lava,trachyte clastic tuff,potassium-bearing feldspathic tuff sericite phyllite and so on.The Tudiling niobium-tantalum deposit,Miaoya niobium rare earth deposit,Shaxiongdong niobium rare earth deposit and Tianbao niobium deposit should belong to the same metallogenic series,and the genetic type belongs to the transitional type of deposit,which has the characteristics of both magmatic and magmatic hydrothermal deposits.It is preliminarily estimated that the NbTaⅠ1,NbTaⅡ1,NbTaⅡ2niobium-tantalum ore bodies(Nb2O5,Ta2O5)334resources have the scale of large-scale niobium-tantalum deposits.The Wenjiawan-Huangjiagou area in the west of Miaoya has similar metallogenic geological conditions and great metallogenic potential.
作者
熊意林
钟石玉
李志刚
黄景孟
鲁显松
杜翌超
吴恩政
李忠林
赵生贵
朱正勇
Xiong Yilin;Zhong Shiyu;Li Zhigang;Huang Jingmeng;Lu Xiansong;Du Yichao;Wu Enzheng;Li Zhonglin;Zhao Shenggui;Zhu Zhengyong(Hubei Geological Survey,Wuhan,Hubei 430034)
出处
《资源环境与工程》
2018年第B11期1-7,43,共8页
Resources Environment & Engineering
基金
湖北省竹山-竹溪地区铌金矿调查评价
项目编号[2015]23号
关键词
粗面质火山岩
铌钽矿床
地质特征
找矿前景
土地岭
南秦岭
Trachyte volcanic rocks
niobium-tantalum deposit
geological characteristics
prospecting prospect
Tudiling
southern Qinling Mountains
