岩石圈地幔中的熔体-岩石相互作用过程对东北钾质玄武岩成分的影响
Melt-rock interaction is a common mantle process occuring in the mantle during the ascending of melts.Here,we present a case study of Quaternary Nuominhe basalts from the Greater Khingan Range to investigate the effect of melt-rock ineraction on the formation of potassic basalts.The Nuominhe basalts are predominantly basanites with high MgO and alkalinities(MgO=9.0–16.8wt.%,K2O+Na2O=6.0–8.2wt.%).They are characterized by positively Ba,K and Sr,and negative Th,U,Zr,Hf,and Ti anomalies,similar to EM1-type OIBs and average lower continental crust(LCC).
钾质玄武岩 岩石成分 岩石圈地幔 熔体 岩石 相互作用过程
刘建强 陈立辉 王小均 钟源 俞恂 曾罡
南京大学地球科学与工程学院 南京 210023
国内会议
北京
中文
2096-2096
2016-10-15(万方平台首次上网日期,不代表论文的发表时间)