地质科技情报2017，Vol.36Issue(3)：82-91,10.DOI:10.19509/j.cnki.dzkq.2017.0311
甘肃红石泉伟晶状白岗岩岩相学和岩石地球化学
Petrography and Petrogeochemistry of Pegmatoidal Alaskite in Hongshiquan, Gansu
摘要
Abstract
Pegmatoidal alaskite is a hosting rock of Hongshiquan uranium deposit,containing primary minerals k-feldspar,quartz,plagioclase,biotite and muscovite,and accessary minerals,pyrite and zircon.The characteristics of alaskite is its enriched silicon (SiO2 =72.36％),and alkali (Na2O-+-K2O=8.75％),relatively rich in potassium but depleted in Na (K2O/Na2 O =2.67),iron (TFe2 O3 =2.75 ％),magnesium (MgO=0.70％),and calcium(CaO=0.74％),with weak peraluminous.It belongs to the weak aluminum high potassium calc alkaline series rocks,showing the characteristics of S type granite.The trace elements are relatively rich in Rb,Th,U,La,Ce,Nd,Zr,Hf and other elements,and depleted in Sr,Ba,Ti,P and other elements,with obvious U and Th enrichment,and Eu negative anomaly.Rare earth elements are relatively enriched light REE,and LREE fractionation of heavy REE are significant,chondrite standard of distribution pattern diagram slightly tilted to right on the whole.The characteristics of tectonicmagmatic evolution of the area shows the pegmatoidal alaskite is formed in post collisional tectonic environment of middle-high temperature and low pressure.关键词
伟晶状白岗岩/岩石地球化学/岩相学/红石泉/甘肃Key words
pegmatoidal alaskite/petrogeochemistry/petrography/Hongshiquan/Gansu分类
天文与地球科学引用本文复制引用
杨春四,张树明,许迅,秦雨,阮小语,彭瑞强..甘肃红石泉伟晶状白岗岩岩相学和岩石地球化学[J].地质科技情报,2017,36(3):82-91,10.基金项目
国家自然科学基金项目(41172079) （41172079）
