摘要
水根萨依铌矿化是谢米斯台地区新发现的找矿线索,基于其地质矿化特征,对赋矿花岗斑岩岩石地球化学特征进行了研究,初步探讨其成矿背景。矿化体的产出受控于正长花岗斑岩与流纹岩接触带,包括花岗斑岩型与伟晶岩型2种,前者具块状构造,铌钽分布均匀,(Nb+Ta)2O5多集中于0.015 4%~0.018 4%,最高为0.030 8%,后者呈带状展布,矿化主要产于微斜长石带,(Nb+Ta)2O5多大于0.01%,个别达0.049 5%。赋矿花岗斑岩具A型花岗岩特征。铌矿化、正长花岗斑岩、花岗质伟晶岩脉成因联系密切,推测水根萨依铌矿化形成于中志留世,成矿背景为后碰撞阶段的挤压-伸展转变期。
Studing the geologic,mineralization,geochemical characteristics of Shuigensayi Niobium Deposit,which is a new prospecting result of Xiemisitai region,this paper aims to discuss its Genesis and significance.The mineralization Shuigensayi Niobium can be divided into two types, syenogranite porphyry and granite pegmatite.The mineralization of the former is massive structure mainly which Niobium is uniform distribution and （Nb＋Ta）20, is focused on 0.0184%- 0.0154%, the highest is 0.0308%.The typemineralization of the latter is mainly vein stxucture,which Niobium is mainly distributed by Microcline feldspar,（Nb＋Ta）20, of which is more than 0.1% and individual 0.0495% .The syenogranite por- phyry belong to A type granite.The genesis of niobium mineralization is closely related to syenogranite porphyry and granite pegmatite,and the background of Niobium mineralization is Extrusion-extension transition period of post - colli- sion phase.
作者
尹松
王元元
杨清茂
张叶军
杨小强
杨延平
Yin Song;Wang Yuanyuan;Yang Qingmao;Zhang Yejun;Yang Xiaoqiang;Yang Yanping(Geologic Party No.216,CNNC,Urumuqi,Xinjiang,830011,China)
出处
《新疆地质》
CAS
CSCD
北大核心
2018年第3期347-352,共6页
Xinjiang Geology
基金
中央财政地勘费项目--新疆西准噶尔火山岩带铀矿资源调查评价与勘查项目(201610)资助
关键词
西准
谢米斯台
水根萨依
铌矿
构造环境
West Junggar
Xiemisitai region
Shuigensayi
Niobium
Background
