【摘要】：偉晶狀白崗巖是紅石泉鈾礦床的含礦主巖,主要由鉀長(zhǎng)石、石英以及斜長(zhǎng)石、黑云母、白云母組成,副礦物為黃鐵礦和鋯石。具有富硅(w(SiO_2)平均72.36%)、高堿(w(Na_2O+K_2O)平均8.75%),相對(duì)富鉀貧鈉(w(K_2O/Na_2O)平均2.67),低鐵(w(TFe_2O_3)平均2.75%)、鎂(w(MgO)平均0.70%)、鈣(w(CaO)平均0.74%),弱過(guò)鋁的特點(diǎn),屬于弱過(guò)鋁高鉀鈣堿性系列巖石,具有S型花崗巖特征。微量元素Rb、Th、U、La、Ce、Nd、Zr、Hf等元素相對(duì)富集,Ba、Sr、Ti、P等元素相對(duì)虧損,具有明顯的U、Th富集,Eu負(fù)異常。輕稀土元素相對(duì)富集,較重稀土元素分餾明顯,球粒隕石標(biāo)準(zhǔn)化分布型式圖總體略顯右傾。結(jié)合該區(qū)的構(gòu)造-巖漿演化特點(diǎn),認(rèn)為偉晶狀白崗巖形成于中高溫低壓的后碰撞構(gòu)造環(huán)境。
[Abstract]:Pegmatite is the main ore-bearing rock of Hongshiquan uranium deposit, which is mainly composed of potassium feldspar, quartz, plagioclase, biomica and Muscovite, and the accessory minerals are pyrite and zircon. It has the characteristics of silicon-rich (w (SiO_2 (72.36%), high alkali (w (Na_2O K 鈮，

本文編號(hào)：2505360